Version bump

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

.gitignore

@@ -15,3 +15,4 @@ build/
 *.iml
 *.jks
 keystore.properties
+package-info.java

.idea/codeStyles/Project.xml

@@ -94,6 +94,8 @@
       <option name="XML_LEGACY_SETTINGS_IMPORTED" value="true" />
     </XML>
     <codeStyleSettings language="JAVA">
+      <option name="METHOD_ANNOTATION_WRAP" value="0" />
+      <option name="FIELD_ANNOTATION_WRAP" value="0" />
       <arrangement>
         <groups />
         <rules>

.idea/copyright/Default.xml

@@ -1,6 +1,6 @@
 <component name="CopyrightManager">
   <copyright>
-    <option name="notice" value="Copyright © &amp;#36;today.year Firstname Lastname &lt;email@example.org&gt;&#10;SPDX-License-Identifier:" />
+    <option name="notice" value="Copyright © &amp;#36;today.year Firstname Lastname &lt;email@example.org&gt;&#10;SPDX-License-Identifier: Apache-2.0
     <option name="myName" value="Default" />
   </copyright>
 </component>

.idea/copyright/GPL_2_0_or_later.xml

@@ -1,6 +0,0 @@
-<component name="CopyrightManager">
-  <copyright>
-    <option name="myName" value="GPL-2.0-or-later" />
-    <option name="notice" value="Copyright © &amp;#36;today.year Firstname Lastname &lt;email@example.com&gt;&#10;SPDX-License-Identifier: GPL-2.0-or-later" />
-  </copyright>
-</component>

COPYING

@@ -1,338 +1,202 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
 
-                            Preamble
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Lesser General Public License instead.)  You can apply it to
-your programs, too.
+   1. Definitions.
 
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
 
-  To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
 
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have.  You must make sure that they, too, receive or can get the
-source code.  And you must show them these terms so they know their
-rights.
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
 
-  We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
 
-  Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software.  If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
 
-  Finally, any free program is threatened constantly by software
-patents.  We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary.  To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
 
-  The precise terms and conditions for copying, distribution and
-modification follow.
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
 
-                    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
 
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License.  The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language.  (Hereinafter, translation is included without limitation in
-the term "modification".)  Each licensee is addressed as "you".
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
 
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope.  The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
 
-  1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
 
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
 
-  2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
 
-    a) You must cause the modified files to carry prominent notices
-    stating that you changed the files and the date of any change.
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
 
-    b) You must cause any work that you distribute or publish, that in
-    whole or in part contains or is derived from the Program or any
-    part thereof, to be licensed as a whole at no charge to all third
-    parties under the terms of this License.
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
 
-    c) If the modified program normally reads commands interactively
-    when run, you must cause it, when started running for such
-    interactive use in the most ordinary way, to print or display an
-    announcement including an appropriate copyright notice and a
-    notice that there is no warranty (or else, saying that you provide
-    a warranty) and that users may redistribute the program under
-    these conditions, and telling the user how to view a copy of this
-    License.  (Exception: if the Program itself is interactive but
-    does not normally print such an announcement, your work based on
-    the Program is not required to print an announcement.)
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
 
-These requirements apply to the modified work as a whole.  If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works.  But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
 
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
 
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
 
-  3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
 
-    a) Accompany it with the complete corresponding machine-readable
-    source code, which must be distributed under the terms of Sections
-    1 and 2 above on a medium customarily used for software interchange; or,
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
 
-    b) Accompany it with a written offer, valid for at least three
-    years, to give any third party, for a charge no more than your
-    cost of physically performing source distribution, a complete
-    machine-readable copy of the corresponding source code, to be
-    distributed under the terms of Sections 1 and 2 above on a medium
-    customarily used for software interchange; or,
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
 
-    c) Accompany it with the information you received as to the offer
-    to distribute corresponding source code.  (This alternative is
-    allowed only for noncommercial distribution and only if you
-    received the program in object code or executable form with such
-    an offer, in accord with Subsection b above.)
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
 
-The source code for a work means the preferred form of the work for
-making modifications to it.  For an executable work, complete source
-code means all the source code for all modules it contains, plus any
-associated interface definition files, plus the scripts used to
-control compilation and installation of the executable.  However, as a
-special exception, the source code distributed need not include
-anything that is normally distributed (in either source or binary
-form) with the major components (compiler, kernel, and so on) of the
-operating system on which the executable runs, unless that component
-itself accompanies the executable.
+   END OF TERMS AND CONDITIONS
 
-If distribution of executable or object code is made by offering
-access to copy from a designated place, then offering equivalent
-access to copy the source code from the same place counts as
-distribution of the source code, even though third parties are not
-compelled to copy the source along with the object code.
+   APPENDIX: How to apply the Apache License to your work.
 
-  4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License.  Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
-this License will not have their licenses terminated so long as such
-parties remain in full compliance.
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
 
-  5. You are not required to accept this License, since you have not
-signed it.  However, nothing else grants you permission to modify or
-distribute the Program or its derivative works.  These actions are
-prohibited by law if you do not accept this License.  Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
+   Copyright [yyyy] [name of copyright owner]
 
-  6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions.  You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
-this License.
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
 
-  7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all.  For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
+       http://www.apache.org/licenses/LICENSE-2.0
 
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices.  Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
-  8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded.  In such case, this License incorporates
-the limitation as if written in the body of this License.
-
-  9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-Each version is given a distinguishing version number.  If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation.  If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
-  10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission.  For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this.  Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
-                            NO WARRANTY
-
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
-
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License version 2
-    as published by the Free Software Foundation.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
-
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Ty Coon>, 1 April 1989
-  Ty Coon, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs.  If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -13,19 +13,3 @@ $ git submodule init
 $ git submodule update
 $ ./gradlew assembleRelease
 ```
-
-## License
-
-    This program is free software; you can redistribute it and/or
-    modify it under the terms of the GNU General Public License
-    as published by the Free Software Foundation; either version 2
-    of the License, or (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

app/build.gradle

@@ -1,11 +1,12 @@
 apply plugin: 'com.android.application'
+apply from: 'nonnull.gradle'
 
 // Create a variable called keystorePropertiesFile, and initialize it to your
 // keystore.properties file, in the rootProject folder.
 final def keystorePropertiesFile = rootProject.file("keystore.properties")
 
 android {
-    buildToolsVersion '28.0.0'
+    buildToolsVersion '28.0.1'
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
@@ -16,8 +17,8 @@ android {
         applicationId 'com.wireguard.android'
         minSdkVersion 21
         targetSdkVersion 27
-        versionCode 427
-        versionName '0.0.20180625'
+        versionCode 433
+        versionName '0.0.20180716'
     }
     // If the keystore file exists
     if (keystorePropertiesFile.exists()) {
@@ -40,6 +41,10 @@ android {
         release {
             if (keystorePropertiesFile.exists()) signingConfig signingConfigs.release
         }
+        debug {
+            applicationIdSuffix ".debug"
+            versionNameSuffix "-debug"
+        }
     }
     externalNativeBuild {
         cmake {
@@ -52,6 +57,7 @@ ext {
     databindingVersion = '3.1.3'
     supportLibsVersion = '27.1.1'
     streamsupportVersion = '1.6.0'
+    jsr305Version = '3.0.2'
 }
 
 dependencies {
@@ -63,6 +69,7 @@ dependencies {
     implementation "com.android.support:support-annotations:$supportLibsVersion"
     implementation "net.sourceforge.streamsupport:android-retrofuture:$streamsupportVersion"
     implementation "net.sourceforge.streamsupport:android-retrostreams:$streamsupportVersion"
+    implementation "com.google.code.findbugs:jsr305:$jsr305Version"
 }
 
 tasks.withType(JavaCompile) {

app/nonnull.gradle

@@ -0,0 +1,87 @@
+/*
+ * Copyright © 2018 Eric Kuck <eric@bluelinelabs.com>.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+task generateNonNullJavaFiles(dependsOn: "assembleDebug", type: Copy) {
+    group = "Copying"
+    description = "Generate package-info.java classes"
+
+    def basePackage = "com" + File.separatorChar + "wireguard"
+    def mainSrcPhrase = "src" + File.separatorChar + "main" + File.separatorChar +
+            "java" + File.separatorChar
+    def mainTestSrcPhrase = "src" + File.separatorChar + "test" + File.separatorChar +
+            "java" + File.separatorChar
+    def mainAndroidTestSrcPhrase = "src" + File.separatorChar + "androidTest" + File.separatorChar +
+            "java" + File.separatorChar
+
+    def sourceDir = file( "${projectDir}" + File.separatorChar + "src" + File.separatorChar +
+            "main" + File.separatorChar + "java" + File.separatorChar +
+            basePackage )
+    def testSourceDir = file( "${projectDir}" + File.separatorChar + "src" + File.separatorChar +
+            "test" + File.separatorChar + "java" + File.separatorChar +
+            basePackage)
+    def androidTestSourceDir = file( "${projectDir}" + File.separatorChar + "src" + File
+            .separatorChar +
+            "androidTest" + File.separatorChar + "java" + File.separatorChar +
+            basePackage )
+
+    generateInfoFiles(sourceDir, mainSrcPhrase);
+    sourceDir.eachDirRecurse { dir ->
+        generateInfoFiles(dir, mainSrcPhrase)
+    }
+    if (file(testSourceDir).exists()) {
+        generateInfoFiles(testSourceDir, mainTestSrcPhrase);
+        testSourceDir.eachDirRecurse { dir ->
+            generateInfoFiles(dir, mainTestSrcPhrase)
+        }
+    }
+    if (file(androidTestSourceDir).exists()) {
+        generateInfoFiles(androidTestSourceDir, mainAndroidTestSrcPhrase);
+        androidTestSourceDir.eachDirRecurse { dir ->
+            generateInfoFiles(dir, mainAndroidTestSrcPhrase)
+        }
+    }
+    println "[SUCCESS] NonNull generator: package-info.java files checked"
+}
+
+private void generateInfoFiles(File dir, String mainSrcPhrase) {
+    def infoFileContentHeader = getFileContentHeader();
+    def infoFileContentFooter = getFileContentFooter();
+    def infoFilePath = dir.getAbsolutePath() + File.separatorChar + "package-info.java"
+
+    //file(infoFilePath).delete(); //do not use in production code
+    if (!file(infoFilePath).exists()) {
+        def infoFileContentPackage = getFileContentPackage(dir.getAbsolutePath(), mainSrcPhrase);
+        new File(infoFilePath).write(infoFileContentHeader +
+                infoFileContentPackage + infoFileContentFooter)
+        println "[dir] " + infoFilePath + "  created";
+    }
+}
+
+def getFileContentPackage(String path, String mainSrcPhrase) {
+    def mainSrcPhraseIndex = path.indexOf(mainSrcPhrase)
+    def output = path.substring(mainSrcPhraseIndex)
+
+    // Win hotfix
+    if (System.properties['os.name'].toLowerCase().contains('windows')) {
+        output = output.replace("\\", "/")
+        mainSrcPhrase = mainSrcPhrase.replace("\\", "/")
+    }
+
+    return "package " + output.replaceAll(mainSrcPhrase, "").replaceAll(
+                "/", ".") + ";\n"
+}
+
+def getFileContentHeader() {
+    return  "/**\n" +
+            " * Make all method parameters @NonNull by default.\n" +
+            " */\n" +
+            "@NonNullForAll\n"
+}
+
+def getFileContentFooter() {
+    return  "\n" +
+            "import com.wireguard.util.NonNullForAll;\n"
+}
+

app/src/debug/res/values/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">WireGuard β</string>
+</resources>

app/src/main/AndroidManifest.xml

@@ -9,7 +9,7 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
     <permission
-        android:name="com.wireguard.android.permission.CONTROL_TUNNELS"
+        android:name="${applicationId}.permission.CONTROL_TUNNELS"
         android:protectionLevel="dangerous"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/permission_label"
@@ -59,7 +59,7 @@
 
         <receiver
             android:name=".model.TunnelManager$IntentReceiver"
-            android:permission="com.wireguard.android.permission.CONTROL_TUNNELS">
+            android:permission="${applicationId}.permission.CONTROL_TUNNELS">
             <intent-filter>
                 <action android:name="com.wireguard.android.action.REFRESH_TUNNEL_STATES" />
                 <action android:name="com.wireguard.android.action.SET_TUNNEL_UP" />

app/src/main/java/com/wireguard/android/Application.java

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android;
@@ -10,6 +10,7 @@ import android.os.AsyncTask;
 import android.os.Handler;
 import android.os.Looper;
 import android.preference.PreferenceManager;
+import android.support.annotation.Nullable;
 import android.support.v7.app.AppCompatDelegate;
 
 import com.wireguard.android.backend.Backend;
@@ -25,19 +26,20 @@ import com.wireguard.android.util.ToolsInstaller;
 import java.io.File;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
-import java.util.List;
+import java.util.Collection;
+import java.util.Objects;
 import java.util.concurrent.Executor;
 
 public class Application extends android.app.Application {
-    private static WeakReference<Application> weakSelf;
-    private AsyncWorker asyncWorker;
-    private Backend backend;
-    private RootShell rootShell;
-    private SharedPreferences sharedPreferences;
-    private ToolsInstaller toolsInstaller;
-    private TunnelManager tunnelManager;
-    private Handler handler;
-    private List<BackendCallback> haveBackendCallbacks = new ArrayList<>();
+    @SuppressWarnings("NullableProblems") private static WeakReference<Application> weakSelf;
+    @SuppressWarnings("NullableProblems") private AsyncWorker asyncWorker;
+    @SuppressWarnings("NullableProblems") private RootShell rootShell;
+    @SuppressWarnings("NullableProblems") private SharedPreferences sharedPreferences;
+    @SuppressWarnings("NullableProblems") private ToolsInstaller toolsInstaller;
+    @SuppressWarnings("NullableProblems") private TunnelManager tunnelManager;
+    @SuppressWarnings("NullableProblems") private Handler handler;
+    @Nullable private Backend backend;
+    @Nullable private Collection<BackendCallback> haveBackendCallbacks = new ArrayList<>();
     private final Object haveBackendCallbacksLock = new Object();
 
     public Application() {
@@ -65,9 +67,11 @@ public class Application extends android.app.Application {
                 if (app.backend == null)
                     app.backend = new GoBackend(app.getApplicationContext());
                 synchronized (app.haveBackendCallbacksLock) {
-                    for (final BackendCallback callback : app.haveBackendCallbacks)
-                        app.handler.post(() -> callback.callback(app.backend));
-                    app.haveBackendCallbacks = null;
+                    if (app.haveBackendCallbacks != null) {
+                        for (final BackendCallback callback : app.haveBackendCallbacks)
+                            app.handler.post(() -> callback.callback(app.backend));
+                        app.haveBackendCallbacks = null;
+                    }
                 }
             }
             return app.backend;
@@ -82,10 +86,12 @@ public class Application extends android.app.Application {
     public static void onHaveBackend(final BackendCallback callback) {
         final Application app = get();
         synchronized (app.haveBackendCallbacksLock) {
-            if (app.haveBackendCallbacks == null)
+            if (app.haveBackendCallbacks == null) {
+                Objects.requireNonNull(app.backend, "Backend still null in onHaveBackend call");
                 callback.callback(app.backend);
-            else
+            } else {
                 app.haveBackendCallbacks.add(callback);
+            }
         }
     }
 

app/src/main/java/com/wireguard/android/BootShutdownReceiver.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android;
@@ -21,7 +21,7 @@ public class BootShutdownReceiver extends BroadcastReceiver {
     @Override
     public void onReceive(final Context context, final Intent intent) {
         Application.onHaveBackend(backend -> {
-            if (backend.getClass() != WgQuickBackend.class)
+            if (!(backend instanceof WgQuickBackend))
                 return;
             final String action = intent.getAction();
             if (action == null)

app/src/main/java/com/wireguard/android/QuickTileService.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android;
@@ -10,10 +10,13 @@ import android.annotation.TargetApi;
 import android.content.Intent;
 import android.databinding.Observable;
 import android.databinding.Observable.OnPropertyChangedCallback;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
 import android.graphics.drawable.Icon;
 import android.os.Build;
 import android.service.quicksettings.Tile;
 import android.service.quicksettings.TileService;
+import android.support.annotation.Nullable;
 import android.util.Log;
 import android.widget.Toast;
 
@@ -21,6 +24,7 @@ import com.wireguard.android.activity.MainActivity;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.Tunnel.State;
 import com.wireguard.android.util.ExceptionLoggers;
+import com.wireguard.android.widget.SlashDrawable;
 
 import java.util.Objects;
 
@@ -36,11 +40,35 @@ public class QuickTileService extends TileService {
 
     private final OnStateChangedCallback onStateChangedCallback = new OnStateChangedCallback();
     private final OnTunnelChangedCallback onTunnelChangedCallback = new OnTunnelChangedCallback();
-    private Tunnel tunnel;
+    @Nullable private Tunnel tunnel;
+    @Nullable private Icon iconOn;
+    @Nullable private Icon iconOff;
+
+    @SuppressWarnings("deprecation")
+    @Override
+    public void onCreate() {
+        final SlashDrawable icon = new SlashDrawable(getResources().getDrawable(R.drawable.ic_tile));
+        icon.setAnimationEnabled(false); /* Unfortunately we can't have animations, since Icons are marshaled. */
+        icon.setSlashed(false);
+        Bitmap b = Bitmap.createBitmap(icon.getIntrinsicWidth(), icon.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
+        Canvas c = new Canvas(b);
+        icon.setBounds(0, 0, c.getWidth(), c.getHeight());
+        icon.draw(c);
+        iconOn = Icon.createWithBitmap(b);
+        icon.setSlashed(true);
+        b = Bitmap.createBitmap(icon.getIntrinsicWidth(), icon.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
+        c = new Canvas(b);
+        icon.setBounds(0, 0, c.getWidth(), c.getHeight());
+        icon.draw(c);
+        iconOff = Icon.createWithBitmap(b);
+    }
 
     @Override
     public void onClick() {
         if (tunnel != null) {
+            final Tile tile = getQsTile();
+            tile.setIcon(tile.getIcon() == iconOn ? iconOff : iconOn);
+            tile.updateTile();
             tunnel.setState(State.TOGGLE).whenComplete(this::onToggleFinished);
         } else {
             final Intent intent = new Intent(this, MainActivity.class);
@@ -65,7 +93,7 @@ public class QuickTileService extends TileService {
     }
 
     private void onToggleFinished(@SuppressWarnings("unused") final State state,
-                                  final Throwable throwable) {
+                                  @Nullable final Throwable throwable) {
         if (throwable == null)
             return;
         final String error = ExceptionLoggers.unwrapMessage(throwable);
@@ -99,10 +127,7 @@ public class QuickTileService extends TileService {
             return;
         tile.setLabel(label);
         if (tile.getState() != state) {
-            // The icon must be changed every time the state changes, or the shade will not change.
-            final Integer iconResource = state == Tile.STATE_ACTIVE ? R.drawable.ic_tile
-                    : R.drawable.ic_tile_disabled;
-            tile.setIcon(Icon.createWithResource(this, iconResource));
+            tile.setIcon(state == Tile.STATE_ACTIVE ? iconOn : iconOff);
             tile.setState(state);
         }
         tile.updateTile();

app/src/main/java/com/wireguard/android/activity/BaseActivity.java

@@ -1,18 +1,17 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.activity;
 
-import android.content.Intent;
 import android.databinding.CallbackRegistry;
 import android.databinding.CallbackRegistry.NotifierCallback;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 
 import com.wireguard.android.Application;
-import com.wireguard.android.backend.GoBackend;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.TunnelManager;
 
@@ -26,19 +25,19 @@ public abstract class BaseActivity extends ThemeChangeAwareActivity {
     private static final String KEY_SELECTED_TUNNEL = "selected_tunnel";
 
     private final SelectionChangeRegistry selectionChangeRegistry = new SelectionChangeRegistry();
-    private Tunnel selectedTunnel;
+    @Nullable private Tunnel selectedTunnel;
 
-    public void addOnSelectedTunnelChangedListener(
-            final OnSelectedTunnelChangedListener listener) {
+    public void addOnSelectedTunnelChangedListener(final OnSelectedTunnelChangedListener listener) {
         selectionChangeRegistry.add(listener);
     }
 
+    @Nullable
     public Tunnel getSelectedTunnel() {
         return selectedTunnel;
     }
 
     @Override
-    protected void onCreate(final Bundle savedInstanceState) {
+    protected void onCreate(@Nullable final Bundle savedInstanceState) {
         // Restore the saved tunnel if there is one; otherwise grab it from the arguments.
         String savedTunnelName = null;
         if (savedInstanceState != null)
@@ -52,14 +51,6 @@ public abstract class BaseActivity extends ThemeChangeAwareActivity {
 
         // The selected tunnel must be set before the superclass method recreates fragments.
         super.onCreate(savedInstanceState);
-
-        Application.onHaveBackend(backend -> {
-            if (backend.getClass() == GoBackend.class) {
-                final Intent intent = GoBackend.VpnService.prepare(this);
-                if (intent != null)
-                    startActivityForResult(intent, 0);
-            }
-        });
     }
 
     @Override
@@ -69,14 +60,14 @@ public abstract class BaseActivity extends ThemeChangeAwareActivity {
         super.onSaveInstanceState(outState);
     }
 
-    protected abstract void onSelectedTunnelChanged(Tunnel oldTunnel, Tunnel newTunnel);
+    protected abstract void onSelectedTunnelChanged(@Nullable Tunnel oldTunnel, @Nullable Tunnel newTunnel);
 
     public void removeOnSelectedTunnelChangedListener(
             final OnSelectedTunnelChangedListener listener) {
         selectionChangeRegistry.remove(listener);
     }
 
-    public void setSelectedTunnel(final Tunnel tunnel) {
+    public void setSelectedTunnel(@Nullable final Tunnel tunnel) {
         final Tunnel oldTunnel = selectedTunnel;
         if (Objects.equals(oldTunnel, tunnel))
             return;
@@ -86,7 +77,7 @@ public abstract class BaseActivity extends ThemeChangeAwareActivity {
     }
 
     public interface OnSelectedTunnelChangedListener {
-        void onSelectedTunnelChanged(Tunnel oldTunnel, Tunnel newTunnel);
+        void onSelectedTunnelChanged(@Nullable Tunnel oldTunnel, @Nullable Tunnel newTunnel);
     }
 
     private static final class SelectionChangeNotifier

app/src/main/java/com/wireguard/android/activity/MainActivity.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.activity;
@@ -9,6 +9,7 @@ package com.wireguard.android.activity;
 import android.annotation.SuppressLint;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
@@ -22,6 +23,8 @@ import com.wireguard.android.fragment.TunnelEditorFragment;
 import com.wireguard.android.fragment.TunnelListFragment;
 import com.wireguard.android.model.Tunnel;
 
+import java.util.List;
+
 import java9.util.stream.Stream;
 
 /**
@@ -33,6 +36,7 @@ import java9.util.stream.Stream;
 public class MainActivity extends BaseActivity {
     private static final String KEY_STATE = "fragment_state";
     private static final String TAG = "WireGuard/" + MainActivity.class.getSimpleName();
+
     private State state = State.EMPTY;
 
     private boolean moveToState(final State nextState) {
@@ -70,13 +74,19 @@ public class MainActivity extends BaseActivity {
 
     @Override
     public void onBackPressed() {
-        TunnelListFragment fragment = null;
-        try {
-            fragment = ((TunnelListFragment) getSupportFragmentManager().getFragments().get(0));
-        } catch (final ClassCastException ignored) { }
-        if (fragment == null || !fragment.collapseActionMenu()) {
-            if (!moveToState(State.ofLayer(state.layer - 1)))
-                super.onBackPressed();
+        final List<Fragment> fragments = getSupportFragmentManager().getFragments();
+
+        boolean handled = false;
+        if (!fragments.isEmpty() && fragments.get(0) instanceof TunnelListFragment) {
+            handled = ((TunnelListFragment) fragments.get(0)).collapseActionMenu();
+        }
+
+        if (!handled) {
+            handled = moveToState(State.ofLayer(state.layer - 1));
+        }
+
+        if (!handled) {
+            super.onBackPressed();
         }
     }
 
@@ -84,7 +94,7 @@ public class MainActivity extends BaseActivity {
     // calling View#performClick defeats the purpose of it.
     @SuppressLint("ClickableViewAccessibility")
     @Override
-    protected void onCreate(final Bundle savedInstanceState) {
+    protected void onCreate(@Nullable final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main_activity);
         if (savedInstanceState != null && savedInstanceState.getString(KEY_STATE) != null)
@@ -99,9 +109,10 @@ public class MainActivity extends BaseActivity {
         final int actionBarId = getResources().getIdentifier("action_bar", "id", getPackageName());
         if (actionBarId != 0 && findViewById(actionBarId) != null) {
             findViewById(actionBarId).setOnTouchListener((v, e) -> {
-                try {
-                    ((TunnelListFragment) getSupportFragmentManager().getFragments().get(0)).collapseActionMenu();
-                } catch (final ClassCastException ignored) { }
+                final List<Fragment> fragments = getSupportFragmentManager().getFragments();
+                if (!fragments.isEmpty() && fragments.get(0) instanceof TunnelListFragment) {
+                    ((TunnelListFragment) fragments.get(0)).collapseActionMenu();
+                }
                 return false;
             });
         }
@@ -142,7 +153,7 @@ public class MainActivity extends BaseActivity {
     }
 
     @Override
-    protected void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
+    protected void onSelectedTunnelChanged(@Nullable final Tunnel oldTunnel, @Nullable final Tunnel newTunnel) {
         moveToState(newTunnel != null ? State.DETAIL : State.LIST);
     }
 
@@ -157,10 +168,10 @@ public class MainActivity extends BaseActivity {
         DETAIL(TunnelDetailFragment.class, 2),
         EDITOR(TunnelEditorFragment.class, 3);
 
-        private final String fragment;
+        @Nullable private final String fragment;
         private final int layer;
 
-        State(final Class<? extends Fragment> fragment, final int layer) {
+        State(@Nullable final Class<? extends Fragment> fragment, final int layer) {
             this.fragment = fragment != null ? fragment.getName() : null;
             this.layer = layer;
         }

app/src/main/java/com/wireguard/android/activity/SettingsActivity.java

@@ -1,19 +1,20 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.activity;
 
 import android.content.pm.PackageManager;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceFragmentCompat;
 import android.support.v7.preference.PreferenceScreen;
+import android.util.SparseArray;
 import android.view.MenuItem;
 
 import com.wireguard.android.Application;
@@ -22,16 +23,14 @@ import com.wireguard.android.backend.WgQuickBackend;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
 /**
  * Interface for changing application-global persistent settings.
  */
 
 public class SettingsActivity extends ThemeChangeAwareActivity {
-    private final Map<Integer, PermissionRequestCallback> permissionRequestCallbacks = new HashMap<>();
+    private final SparseArray<PermissionRequestCallback> permissionRequestCallbacks = new SparseArray<>();
     private int permissionRequestCounter;
 
     public void ensurePermissions(final String[] permissions, final PermissionRequestCallback cb) {
@@ -54,7 +53,7 @@ public class SettingsActivity extends ThemeChangeAwareActivity {
     }
 
     @Override
-    protected void onCreate(final Bundle savedInstanceState) {
+    protected void onCreate(@Nullable final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         if (getSupportFragmentManager().findFragmentById(android.R.id.content) == null) {
             getSupportFragmentManager().beginTransaction()
@@ -76,8 +75,8 @@ public class SettingsActivity extends ThemeChangeAwareActivity {
 
     @Override
     public void onRequestPermissionsResult(final int requestCode,
-                                           @NonNull final String[] permissions,
-                                           @NonNull final int[] grantResults) {
+                                           final String[] permissions,
+                                           final int[] grantResults) {
         final PermissionRequestCallback f = permissionRequestCallbacks.get(requestCode);
         if (f != null) {
             permissionRequestCallbacks.remove(requestCode);
@@ -102,7 +101,7 @@ public class SettingsActivity extends ThemeChangeAwareActivity {
             final PreferenceScreen screen = getPreferenceScreen();
             Application.onHaveBackend(backend -> {
                 for (final Preference pref : wgQuickOnlyPrefs) {
-                    if (backend.getClass() == WgQuickBackend.class)
+                    if (backend instanceof WgQuickBackend)
                         pref.setVisible(true);
                     else
                         screen.removePreference(pref);

app/src/main/java/com/wireguard/android/activity/ThemeChangeAwareActivity.java

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.activity;
@@ -8,6 +8,7 @@ package com.wireguard.android.activity;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.app.AppCompatDelegate;
 import android.util.Log;
@@ -19,7 +20,7 @@ import java.lang.reflect.Field;
 public abstract class ThemeChangeAwareActivity extends AppCompatActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
     private static final String TAG = "WireGuard/" + ThemeChangeAwareActivity.class.getSimpleName();
 
-    private static Resources lastResources;
+    @Nullable private static Resources lastResources;
     private static boolean lastDarkMode;
     private static synchronized void invalidateDrawableCache(final Resources resources, final boolean darkMode) {
         if (resources == lastResources && darkMode == lastDarkMode)
@@ -51,7 +52,7 @@ public abstract class ThemeChangeAwareActivity extends AppCompatActivity impleme
 
 
     @Override
-    protected void onCreate(final Bundle savedInstanceState) {
+    protected void onCreate(@Nullable final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         Application.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
     }

app/src/main/java/com/wireguard/android/activity/TunnelCreatorActivity.java

@@ -1,12 +1,13 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.activity;
 
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 
 import com.wireguard.android.fragment.TunnelEditorFragment;
 import com.wireguard.android.model.Tunnel;
@@ -18,7 +19,7 @@ import com.wireguard.android.model.Tunnel;
 public class TunnelCreatorActivity extends BaseActivity {
     @Override
     @SuppressWarnings("UnnecessaryFullyQualifiedName")
-    protected void onCreate(final Bundle savedInstanceState) {
+    protected void onCreate(@Nullable final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         if (getSupportFragmentManager().findFragmentById(android.R.id.content) == null) {
             getSupportFragmentManager().beginTransaction()
@@ -28,7 +29,7 @@ public class TunnelCreatorActivity extends BaseActivity {
     }
 
     @Override
-    protected void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
+    protected void onSelectedTunnelChanged(@Nullable final Tunnel oldTunnel, @Nullable final Tunnel newTunnel) {
         finish();
     }
 }

app/src/main/java/com/wireguard/android/backend/Backend.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.backend;

app/src/main/java/com/wireguard/android/backend/GoBackend.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.backend;
@@ -10,6 +10,7 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.os.ParcelFileDescriptor;
+import android.support.annotation.Nullable;
 import android.support.v4.util.ArraySet;
 import android.util.Log;
 
@@ -29,6 +30,7 @@ import com.wireguard.crypto.KeyEncoding;
 import java.net.InetAddress;
 import java.util.Collections;
 import java.util.Formatter;
+import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
@@ -40,7 +42,7 @@ public final class GoBackend implements Backend {
     private static CompletableFuture<VpnService> vpnService = new CompletableFuture<>();
 
     private final Context context;
-    private Tunnel currentTunnel;
+    @Nullable private Tunnel currentTunnel;
     private int currentTunnelHandle = -1;
 
     public GoBackend(final Context context) {
@@ -114,12 +116,14 @@ public final class GoBackend implements Backend {
         return getState(tunnel);
     }
 
-    private void setStateInternal(final Tunnel tunnel, final Config config, final State state)
+    private void setStateInternal(final Tunnel tunnel, @Nullable final Config config, final State state)
             throws Exception {
 
         if (state == State.UP) {
             Log.i(TAG, "Bringing tunnel up");
 
+            Objects.requireNonNull(config, "Trying to bring up a tunnel with no config");
+
             if (VpnService.prepare(context) != null)
                 throw new Exception("VPN service not authorized by user");
 
@@ -171,6 +175,9 @@ public final class GoBackend implements Backend {
             configureIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             builder.setConfigureIntent(PendingIntent.getActivity(context, 0, configureIntent, 0));
 
+            for (final String excludedApplication : config.getInterface().getExcludedApplications())
+                builder.addDisallowedApplication(excludedApplication);
+
             for (final InetNetwork addr : config.getInterface().getAddresses())
                 builder.addAddress(addr.getAddress(), addr.getMask());
 
@@ -242,7 +249,7 @@ public final class GoBackend implements Backend {
         }
 
         @Override
-        public int onStartCommand(final Intent intent, final int flags, final int startId) {
+        public int onStartCommand(@Nullable final Intent intent, final int flags, final int startId) {
             vpnService.complete(this);
             if (intent == null || intent.getComponent() == null || !intent.getComponent().getPackageName().equals(getPackageName())) {
                 Log.d(TAG, "Service started by Always-on VPN feature");
@@ -250,5 +257,6 @@ public final class GoBackend implements Backend {
             }
             return super.onStartCommand(intent, flags, startId);
         }
+
     }
 }

app/src/main/java/com/wireguard/android/backend/WgQuickBackend.java

@@ -1,12 +1,13 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.backend;
 
 import android.content.Context;
+import android.support.annotation.Nullable;
 import android.util.Log;
 
 import com.wireguard.android.Application;
@@ -21,6 +22,7 @@ import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
 import java.util.Set;
 
 import java9.util.stream.Collectors;
@@ -106,8 +108,9 @@ public final class WgQuickBackend implements Backend {
         return getState(tunnel);
     }
 
-    private void setStateInternal(final Tunnel tunnel, final Config config, final State state)
-            throws Exception {
+    private void setStateInternal(final Tunnel tunnel, @Nullable final Config config, final State state) throws Exception {
+        Objects.requireNonNull(config, "Trying to set state with a null config");
+
         final File tempFile = new File(localTemporaryDir, tunnel.getName() + ".conf");
         try (final FileOutputStream stream = new FileOutputStream(tempFile, false)) {
             stream.write(config.toString().getBytes(StandardCharsets.UTF_8));

app/src/main/java/com/wireguard/android/configStore/ConfigStore.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.configStore;

app/src/main/java/com/wireguard/android/configStore/FileConfigStore.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.configStore;

app/src/main/java/com/wireguard/android/databinding/BindingAdapters.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.databinding;
@@ -9,16 +9,18 @@ package com.wireguard.android.databinding;
 import android.databinding.BindingAdapter;
 import android.databinding.ObservableList;
 import android.databinding.adapters.ListenerUtil;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.text.InputFilter;
 import android.widget.LinearLayout;
-import android.widget.ListView;
 import android.widget.TextView;
 
 import com.wireguard.android.R;
-import com.wireguard.util.Keyed;
+import com.wireguard.android.databinding.ObservableKeyedRecyclerViewAdapter.RowConfigurationHandler;
 import com.wireguard.android.util.ObservableKeyedList;
 import com.wireguard.android.widget.ToggleSwitch;
 import com.wireguard.android.widget.ToggleSwitch.OnBeforeCheckedChangeListener;
+import com.wireguard.util.Keyed;
 
 /**
  * Static methods for use by generated code in the Android data binding library.
@@ -65,16 +67,19 @@ public final class BindingAdapters {
         listener.setList(newList);
     }
 
-    @BindingAdapter({"items", "layout"})
+    @BindingAdapter(requireAll = false, value = {"items", "layout", "configurationHandler"})
     public static <K, E extends Keyed<? extends K>>
-    void setItems(final ListView view,
-                  final ObservableKeyedList<K, E> oldList, final int oldLayoutId,
-                  final ObservableKeyedList<K, E> newList, final int newLayoutId) {
+    void setItems(final RecyclerView view,
+                  final ObservableKeyedList<K, E> oldList, final int oldLayoutId, final RowConfigurationHandler oldRowConfigurationHandler,
+                  final ObservableKeyedList<K, E> newList, final int newLayoutId, final RowConfigurationHandler newRowConfigurationHandler) {
+        if (view.getLayoutManager() == null)
+            view.setLayoutManager(new LinearLayoutManager(view.getContext(), RecyclerView.VERTICAL, false));
+
         if (oldList == newList && oldLayoutId == newLayoutId)
             return;
         // The ListAdapter interface is not generic, so this cannot be checked.
-        @SuppressWarnings("unchecked") ObservableKeyedListAdapter<K, E> adapter =
-                (ObservableKeyedListAdapter<K, E>) view.getAdapter();
+        @SuppressWarnings("unchecked") ObservableKeyedRecyclerViewAdapter<K, E> adapter =
+                (ObservableKeyedRecyclerViewAdapter<K, E>) view.getAdapter();
         // If the layout changes, any existing adapter must be replaced.
         if (adapter != null && oldList != null && oldLayoutId != newLayoutId) {
             adapter.setList(null);
@@ -84,9 +89,11 @@ public final class BindingAdapters {
         if (newList == null || newLayoutId == 0)
             return;
         if (adapter == null) {
-            adapter = new ObservableKeyedListAdapter<>(view.getContext(), newLayoutId, newList);
+            adapter = new ObservableKeyedRecyclerViewAdapter<>(view.getContext(), newLayoutId, newList);
             view.setAdapter(adapter);
         }
+
+        adapter.setRowConfigurationHandler(newRowConfigurationHandler);
         // Either the list changed, or this is an entirely new listener because the layout changed.
         adapter.setList(newList);
     }
@@ -96,4 +103,5 @@ public final class BindingAdapters {
                                                  final OnBeforeCheckedChangeListener listener) {
         view.setOnBeforeCheckedChangeListener(listener);
     }
+
 }

app/src/main/java/com/wireguard/android/databinding/ItemChangeListener.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.databinding;
@@ -9,6 +9,7 @@ package com.wireguard.android.databinding;
 import android.databinding.DataBindingUtil;
 import android.databinding.ObservableList;
 import android.databinding.ViewDataBinding;
+import android.support.annotation.Nullable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -16,6 +17,7 @@ import android.view.ViewGroup;
 import com.wireguard.android.BR;
 
 import java.lang.ref.WeakReference;
+import java.util.Objects;
 
 /**
  * Helper class for binding an ObservableList to the children of a ViewGroup.
@@ -26,7 +28,7 @@ class ItemChangeListener<T> {
     private final ViewGroup container;
     private final int layoutId;
     private final LayoutInflater layoutInflater;
-    private ObservableList<T> list;
+    @Nullable private ObservableList<T> list;
 
     ItemChangeListener(final ViewGroup container, final int layoutId) {
         this.container = container;
@@ -34,17 +36,21 @@ class ItemChangeListener<T> {
         layoutInflater = LayoutInflater.from(container.getContext());
     }
 
-    private View getView(final int position, final View convertView) {
-        ViewDataBinding binding = DataBindingUtil.getBinding(convertView);
-        if (binding == null)
+    private View getView(final int position, @Nullable final View convertView) {
+        ViewDataBinding binding = convertView != null ? DataBindingUtil.getBinding(convertView) : null;
+        if (binding == null) {
             binding = DataBindingUtil.inflate(layoutInflater, layoutId, container, false);
+        }
+
+        Objects.requireNonNull(list, "Trying to get a view while list is still null");
+
         binding.setVariable(BR.collection, list);
         binding.setVariable(BR.item, list.get(position));
         binding.executePendingBindings();
         return binding.getRoot();
     }
 
-    void setList(final ObservableList<T> newList) {
+    void setList(@Nullable final ObservableList<T> newList) {
         if (list != null)
             list.removeOnListChangedCallback(callback);
         list = newList;

app/src/main/java/com/wireguard/android/databinding/ObservableKeyedRecyclerViewAdapter.java

@@ -1,7 +1,7 @@
 /*
- * Copyright © 2018 Samuel Holland <samuel@sholland.org>
+ * Copyright © 2018 Eric Kuck <eric@bluelinelabs.com>.
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.databinding;
@@ -10,41 +10,44 @@ import android.content.Context;
 import android.databinding.DataBindingUtil;
 import android.databinding.ObservableList;
 import android.databinding.ViewDataBinding;
+import android.support.annotation.Nullable;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.RecyclerView.Adapter;
 import android.view.LayoutInflater;
-import android.view.View;
 import android.view.ViewGroup;
-import android.widget.BaseAdapter;
 
 import com.wireguard.android.BR;
-import com.wireguard.util.Keyed;
 import com.wireguard.android.util.ObservableKeyedList;
+import com.wireguard.util.Keyed;
 
 import java.lang.ref.WeakReference;
 
 /**
- * A generic {@code ListAdapter} backed by a {@code ObservableKeyedList}.
+ * A generic {@code RecyclerView.Adapter} backed by a {@code ObservableKeyedList}.
  */
 
-class ObservableKeyedListAdapter<K, E extends Keyed<? extends K>> extends BaseAdapter {
+public class ObservableKeyedRecyclerViewAdapter<K, E extends Keyed<? extends K>> extends Adapter<ObservableKeyedRecyclerViewAdapter.ViewHolder> {
+
     private final OnListChangedCallback<E> callback = new OnListChangedCallback<>(this);
     private final int layoutId;
     private final LayoutInflater layoutInflater;
-    private ObservableKeyedList<K, E> list;
+    @Nullable private ObservableKeyedList<K, E> list;
+    @Nullable private RowConfigurationHandler rowConfigurationHandler;
 
-    ObservableKeyedListAdapter(final Context context, final int layoutId,
-                               final ObservableKeyedList<K, E> list) {
+    ObservableKeyedRecyclerViewAdapter(final Context context, final int layoutId,
+                                       final ObservableKeyedList<K, E> list) {
         this.layoutId = layoutId;
         layoutInflater = LayoutInflater.from(context);
         setList(list);
     }
 
     @Override
-    public int getCount() {
+    public int getItemCount() {
         return list != null ? list.size() : 0;
     }
 
-    @Override
-    public E getItem(final int position) {
+    @Nullable
+    private E getItem(final int position) {
         if (list == null || position < 0 || position >= list.size())
             return null;
         return list.get(position);
@@ -56,29 +59,34 @@ class ObservableKeyedListAdapter<K, E extends Keyed<? extends K>> extends BaseAd
         return key != null ? key.hashCode() : -1;
     }
 
+    @Nullable
     private K getKey(final int position) {
         final E item = getItem(position);
         return item != null ? item.getKey() : null;
     }
 
     @Override
-    public View getView(final int position, final View convertView, final ViewGroup parent) {
-        ViewDataBinding binding = DataBindingUtil.getBinding(convertView);
-        if (binding == null)
-            binding = DataBindingUtil.inflate(layoutInflater, layoutId, parent, false);
-        binding.setVariable(BR.collection, list);
-        binding.setVariable(BR.key, getKey(position));
-        binding.setVariable(BR.item, getItem(position));
-        binding.executePendingBindings();
-        return binding.getRoot();
+    public ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
+        return new ViewHolder(DataBindingUtil.inflate(layoutInflater, layoutId, parent, false));
     }
 
+    @SuppressWarnings("unchecked")
     @Override
-    public boolean hasStableIds() {
-        return true;
+    public void onBindViewHolder(final ViewHolder holder, final int position) {
+        holder.binding.setVariable(BR.collection, list);
+        holder.binding.setVariable(BR.key, getKey(position));
+        holder.binding.setVariable(BR.item, getItem(position));
+        holder.binding.executePendingBindings();
+
+        if (rowConfigurationHandler != null) {
+            E item = getItem(position);
+            if (item != null) {
+                rowConfigurationHandler.onConfigureRow(holder.binding, item, position);
+            }
+        }
     }
 
-    void setList(final ObservableKeyedList<K, E> newList) {
+    void setList(@Nullable final ObservableKeyedList<K, E> newList) {
         if (list != null)
             list.removeOnListChangedCallback(callback);
         list = newList;
@@ -88,18 +96,22 @@ class ObservableKeyedListAdapter<K, E extends Keyed<? extends K>> extends BaseAd
         notifyDataSetChanged();
     }
 
+    void setRowConfigurationHandler(final RowConfigurationHandler rowConfigurationHandler) {
+        this.rowConfigurationHandler = rowConfigurationHandler;
+    }
+
     private static final class OnListChangedCallback<E extends Keyed<?>>
             extends ObservableList.OnListChangedCallback<ObservableList<E>> {
 
-        private final WeakReference<ObservableKeyedListAdapter<?, E>> weakAdapter;
+        private final WeakReference<ObservableKeyedRecyclerViewAdapter<?, E>> weakAdapter;
 
-        private OnListChangedCallback(final ObservableKeyedListAdapter<?, E> adapter) {
+        private OnListChangedCallback(final ObservableKeyedRecyclerViewAdapter<?, E> adapter) {
             weakAdapter = new WeakReference<>(adapter);
         }
 
         @Override
         public void onChanged(final ObservableList<E> sender) {
-            final ObservableKeyedListAdapter adapter = weakAdapter.get();
+            final ObservableKeyedRecyclerViewAdapter adapter = weakAdapter.get();
             if (adapter != null)
                 adapter.notifyDataSetChanged();
             else
@@ -130,4 +142,19 @@ class ObservableKeyedListAdapter<K, E extends Keyed<? extends K>> extends BaseAd
             onChanged(sender);
         }
     }
+
+    public static class ViewHolder extends RecyclerView.ViewHolder {
+        final ViewDataBinding binding;
+
+        public ViewHolder(final ViewDataBinding binding) {
+            super(binding.getRoot());
+
+            this.binding = binding;
+        }
+    }
+
+    public interface RowConfigurationHandler<B extends ViewDataBinding, T> {
+        void onConfigureRow(B binding, T item, int position);
+    }
+
 }

app/src/main/java/com/wireguard/android/fragment/AppListDialogFragment.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright © 2018 Eric Kuck <eric@bluelinelabs.com>.
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.android.fragment;
+
+import android.app.Activity;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.Fragment;
+import android.support.v7.app.AlertDialog;
+import android.widget.Toast;
+
+import com.wireguard.android.Application;
+import com.wireguard.android.R;
+import com.wireguard.android.activity.BaseActivity;
+import com.wireguard.android.databinding.AppListDialogFragmentBinding;
+import com.wireguard.android.model.ApplicationData;
+import com.wireguard.android.model.Tunnel;
+import com.wireguard.android.util.ExceptionLoggers;
+import com.wireguard.android.util.ObservableKeyedArrayList;
+import com.wireguard.android.util.ObservableKeyedList;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class AppListDialogFragment extends DialogFragment {
+
+    private static final String KEY_EXCLUDED_APPS = "excludedApps";
+
+    private final List<String> currentlyExcludedApps = Arrays.asList(getArguments().getStringArray(KEY_EXCLUDED_APPS));
+    private final ObservableKeyedList<String, ApplicationData> appData = new ObservableKeyedArrayList<>();
+
+    public static <T extends Fragment & AppExclusionListener> AppListDialogFragment newInstance(final String[] excludedApps, final T target) {
+        final Bundle extras = new Bundle();
+        extras.putStringArray(KEY_EXCLUDED_APPS, excludedApps);
+        final AppListDialogFragment fragment = new AppListDialogFragment();
+        fragment.setTargetFragment(target, 0);
+        fragment.setArguments(extras);
+        return fragment;
+    }
+
+    @Override
+    public Dialog onCreateDialog(final Bundle savedInstanceState) {
+        final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity());
+        alertDialogBuilder.setTitle(R.string.excluded_applications);
+
+        final AppListDialogFragmentBinding binding = AppListDialogFragmentBinding.inflate(getActivity().getLayoutInflater(), null, false);
+        binding.executePendingBindings();
+        alertDialogBuilder.setView(binding.getRoot());
+
+        alertDialogBuilder.setPositiveButton(R.string.set_exclusions, (dialog, which) -> setExclusionsAndDismiss());
+        alertDialogBuilder.setNegativeButton(R.string.cancel, (dialog, which) -> dialog.dismiss());
+        alertDialogBuilder.setNeutralButton(R.string.deselect_all, (dialog, which) -> { });
+
+        binding.setFragment(this);
+        binding.setAppData(appData);
+
+        loadData();
+
+        final AlertDialog dialog = alertDialogBuilder.create();
+        dialog.setOnShowListener(d -> dialog.getButton(DialogInterface.BUTTON_NEUTRAL).setOnClickListener(view -> {
+                for (final ApplicationData app : appData)
+                    app.setExcludedFromTunnel(false);
+        }));
+        return dialog;
+    }
+
+    private void loadData() {
+        final Activity activity = getActivity();
+        if (activity == null) {
+            return;
+        }
+
+        final PackageManager pm = activity.getPackageManager();
+        Application.getAsyncWorker().supplyAsync(() -> {
+            final Intent launcherIntent = new Intent(Intent.ACTION_MAIN, null);
+            launcherIntent.addCategory(Intent.CATEGORY_LAUNCHER);
+            final List<ResolveInfo> resolveInfos = pm.queryIntentActivities(launcherIntent, 0);
+
+            final List<ApplicationData> appData = new ArrayList<>();
+            for (ResolveInfo resolveInfo : resolveInfos) {
+                String packageName = resolveInfo.activityInfo.packageName;
+                appData.add(new ApplicationData(resolveInfo.loadIcon(pm), resolveInfo.loadLabel(pm).toString(), packageName, currentlyExcludedApps.contains(packageName)));
+            }
+
+            Collections.sort(appData, (lhs, rhs) -> lhs.getName().toLowerCase().compareTo(rhs.getName().toLowerCase()));
+            return appData;
+        }).whenComplete(((data, throwable) -> {
+            if (data != null) {
+                appData.clear();
+                appData.addAll(data);
+            } else {
+                final String error = throwable != null ? ExceptionLoggers.unwrapMessage(throwable) : "Unknown";
+                final String message = activity.getString(R.string.error_fetching_apps, error);
+                Toast.makeText(activity, message, Toast.LENGTH_LONG).show();
+                dismissAllowingStateLoss();
+            }
+        }));
+    }
+
+    void setExclusionsAndDismiss() {
+        final List<String> excludedApps = new ArrayList<>();
+        for (final ApplicationData data : appData) {
+            if (data.isExcludedFromTunnel()) {
+                excludedApps.add(data.getPackageName());
+            }
+        }
+
+        ((AppExclusionListener) getTargetFragment()).onExcludedAppsSelected(excludedApps);
+        dismiss();
+    }
+
+    public interface AppExclusionListener {
+        void onExcludedAppsSelected(List<String> excludedApps);
+    }
+
+}

app/src/main/java/com/wireguard/android/fragment/BaseFragment.java

@@ -1,17 +1,32 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.fragment;
 
 import android.content.Context;
+import android.content.Intent;
+import android.databinding.DataBindingUtil;
+import android.databinding.ViewDataBinding;
+import android.support.annotation.Nullable;
+import android.support.design.widget.Snackbar;
 import android.support.v4.app.Fragment;
+import android.util.Log;
+import android.view.View;
+import android.widget.Toast;
 
+import com.wireguard.android.Application;
+import com.wireguard.android.R;
 import com.wireguard.android.activity.BaseActivity;
 import com.wireguard.android.activity.BaseActivity.OnSelectedTunnelChangedListener;
+import com.wireguard.android.backend.GoBackend;
+import com.wireguard.android.databinding.TunnelDetailFragmentBinding;
+import com.wireguard.android.databinding.TunnelListItemBinding;
 import com.wireguard.android.model.Tunnel;
+import com.wireguard.android.model.Tunnel.State;
+import com.wireguard.android.util.ExceptionLoggers;
 
 /**
  * Base class for fragments that need to know the currently-selected tunnel. Only does anything when
@@ -19,8 +34,14 @@ import com.wireguard.android.model.Tunnel;
  */
 
 public abstract class BaseFragment extends Fragment implements OnSelectedTunnelChangedListener {
-    private BaseActivity activity;
+    private static final String TAG = "WireGuard/" + BaseFragment.class.getSimpleName();
+    private static final int REQUEST_CODE_VPN_PERMISSION = 23491;
 
+    @Nullable private BaseActivity activity;
+    @Nullable private Tunnel pendingTunnel;
+    @Nullable private Boolean pendingTunnelUp;
+
+    @Nullable
     protected Tunnel getSelectedTunnel() {
         return activity != null ? activity.getSelectedTunnel() : null;
     }
@@ -44,8 +65,64 @@ public abstract class BaseFragment extends Fragment implements OnSelectedTunnelC
         super.onDetach();
     }
 
-    protected void setSelectedTunnel(final Tunnel tunnel) {
+    @Override
+    public void onActivityResult(final int requestCode, final int resultCode, @Nullable final Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+
+        if (requestCode == REQUEST_CODE_VPN_PERMISSION) {
+            if (pendingTunnel != null && pendingTunnelUp != null)
+                setTunnelStateWithPermissionsResult(pendingTunnel, pendingTunnelUp);
+            pendingTunnel = null;
+            pendingTunnelUp = null;
+        }
+    }
+
+    protected void setSelectedTunnel(@Nullable final Tunnel tunnel) {
         if (activity != null)
             activity.setSelectedTunnel(tunnel);
     }
+
+    public void setTunnelState(final View view, final boolean checked) {
+        final ViewDataBinding binding = DataBindingUtil.findBinding(view);
+        final Tunnel tunnel;
+        if (binding instanceof TunnelDetailFragmentBinding)
+            tunnel = ((TunnelDetailFragmentBinding) binding).getTunnel();
+        else if (binding instanceof TunnelListItemBinding)
+            tunnel = ((TunnelListItemBinding) binding).getItem();
+        else
+            return;
+        if (tunnel == null)
+            return;
+
+        Application.onHaveBackend(backend -> {
+            if (backend instanceof GoBackend) {
+                final Intent intent = GoBackend.VpnService.prepare(view.getContext());
+                if (intent != null) {
+                    pendingTunnel = tunnel;
+                    pendingTunnelUp = checked;
+                    startActivityForResult(intent, REQUEST_CODE_VPN_PERMISSION);
+                    return;
+                }
+            }
+
+            setTunnelStateWithPermissionsResult(tunnel, checked);
+        });
+    }
+
+    private void setTunnelStateWithPermissionsResult(final Tunnel tunnel, final boolean checked) {
+        tunnel.setState(State.of(checked)).whenComplete((state, throwable) -> {
+            if (throwable == null)
+                return;
+            final String error = ExceptionLoggers.unwrapMessage(throwable);
+            final int messageResId = checked ? R.string.error_up : R.string.error_down;
+            final String message = getContext().getString(messageResId, error);
+            final View view = getView();
+            if (view != null)
+                Snackbar.make(view, message, Snackbar.LENGTH_LONG).show();
+            else
+                Toast.makeText(getContext(), message, Toast.LENGTH_LONG).show();
+            Log.e(TAG, message, throwable);
+        });
+    }
+
 }

app/src/main/java/com/wireguard/android/fragment/TunnelController.java

@@ -1,58 +0,0 @@
-/*
- * Copyright © 2018 Samuel Holland <samuel@sholland.org>
- * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
-package com.wireguard.android.fragment;
-
-import android.content.Context;
-import android.databinding.DataBindingUtil;
-import android.databinding.ViewDataBinding;
-import android.support.design.widget.Snackbar;
-import android.util.Log;
-import android.view.View;
-
-import com.wireguard.android.R;
-import com.wireguard.android.databinding.TunnelDetailFragmentBinding;
-import com.wireguard.android.databinding.TunnelListItemBinding;
-import com.wireguard.android.model.Tunnel;
-import com.wireguard.android.model.Tunnel.State;
-import com.wireguard.android.util.ExceptionLoggers;
-
-/**
- * Helper method shared by TunnelListFragment and TunnelDetailFragment.
- */
-
-public final class TunnelController {
-    private static final String TAG = "WireGuard/" + TunnelController.class.getSimpleName();
-
-    private TunnelController() {
-        // Prevent instantiation.
-    }
-
-    public static void setTunnelState(final View view, final boolean checked) {
-        final ViewDataBinding binding = DataBindingUtil.findBinding(view);
-        final Tunnel tunnel;
-        if (binding instanceof TunnelDetailFragmentBinding)
-            tunnel = ((TunnelDetailFragmentBinding) binding).getTunnel();
-        else if (binding instanceof TunnelListItemBinding)
-            tunnel = ((TunnelListItemBinding) binding).getItem();
-        else
-            tunnel = null;
-        if (tunnel == null) {
-            Log.e(TAG, "setChecked() from a null tunnel", new IllegalStateException("No tunnel"));
-            return;
-        }
-        tunnel.setState(State.of(checked)).whenComplete((state, throwable) -> {
-            if (throwable == null)
-                return;
-            final Context context = view.getContext();
-            final String error = ExceptionLoggers.unwrapMessage(throwable);
-            final int messageResId = checked ? R.string.error_up : R.string.error_down;
-            final String message = context.getString(messageResId, error);
-            Snackbar.make(view, message, Snackbar.LENGTH_LONG).show();
-            Log.e(TAG, message, throwable);
-        });
-    }
-}

app/src/main/java/com/wireguard/android/fragment/TunnelDetailFragment.java

@@ -1,13 +1,13 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.fragment;
 
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -24,14 +24,16 @@ import com.wireguard.config.Config;
  */
 
 public class TunnelDetailFragment extends BaseFragment {
-    private TunnelDetailFragmentBinding binding;
+    @Nullable private TunnelDetailFragmentBinding binding;
 
     private void onConfigLoaded(final String name, final Config config) {
-        binding.setConfig(new Config.Observable(config, name));
+        if (binding != null) {
+            binding.setConfig(new Config.Observable(config, name));
+        }
     }
 
     @Override
-    public void onCreate(final Bundle savedInstanceState) {
+    public void onCreate(@Nullable final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setHasOptionsMenu(true);
     }
@@ -42,8 +44,8 @@ public class TunnelDetailFragment extends BaseFragment {
     }
 
     @Override
-    public View onCreateView(@NonNull final LayoutInflater inflater, final ViewGroup container,
-                             final Bundle savedInstanceState) {
+    public View onCreateView(final LayoutInflater inflater, @Nullable final ViewGroup container,
+                             @Nullable final Bundle savedInstanceState) {
         super.onCreateView(inflater, container, savedInstanceState);
         binding = TunnelDetailFragmentBinding.inflate(inflater, container, false);
         binding.executePendingBindings();
@@ -57,7 +59,7 @@ public class TunnelDetailFragment extends BaseFragment {
     }
 
     @Override
-    public void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
+    public void onSelectedTunnelChanged(@Nullable final Tunnel oldTunnel, @Nullable final Tunnel newTunnel) {
         if (binding == null)
             return;
         binding.setTunnel(newTunnel);
@@ -68,8 +70,14 @@ public class TunnelDetailFragment extends BaseFragment {
     }
 
     @Override
-    public void onViewStateRestored(final Bundle savedInstanceState) {
+    public void onViewStateRestored(@Nullable final Bundle savedInstanceState) {
+        if (binding == null) {
+            return;
+        }
+
+        binding.setFragment(this);
         onSelectedTunnelChanged(null, getSelectedTunnel());
         super.onViewStateRestored(savedInstanceState);
     }
+
 }

app/src/main/java/com/wireguard/android/fragment/TunnelEditorFragment.java

@@ -1,16 +1,19 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.fragment;
 
 import android.app.Activity;
 import android.content.Context;
+import android.databinding.Observable;
+import android.databinding.ObservableList;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.design.widget.Snackbar;
+import android.support.v4.app.FragmentManager;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -22,31 +25,40 @@ import android.view.inputmethod.InputMethodManager;
 import android.widget.Toast;
 
 import com.wireguard.android.Application;
+import com.wireguard.android.BR;
 import com.wireguard.android.R;
 import com.wireguard.android.databinding.TunnelEditorFragmentBinding;
+import com.wireguard.android.fragment.AppListDialogFragment.AppExclusionListener;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.model.TunnelManager;
 import com.wireguard.android.util.ExceptionLoggers;
+import com.wireguard.config.Attribute;
 import com.wireguard.config.Config;
+import com.wireguard.config.Peer;
+
+import java.util.List;
+import java.util.Objects;
 
 /**
  * Fragment for editing a WireGuard configuration.
  */
 
-public class TunnelEditorFragment extends BaseFragment {
+public class TunnelEditorFragment extends BaseFragment implements AppExclusionListener {
     private static final String KEY_LOCAL_CONFIG = "local_config";
     private static final String KEY_ORIGINAL_NAME = "original_name";
     private static final String TAG = "WireGuard/" + TunnelEditorFragment.class.getSimpleName();
 
-    private TunnelEditorFragmentBinding binding;
-    private Tunnel tunnel;
+    @Nullable private TunnelEditorFragmentBinding binding;
+    @Nullable private Tunnel tunnel;
 
     private void onConfigLoaded(final String name, final Config config) {
-        binding.setConfig(new Config.Observable(config, name));
+        if (binding != null) {
+            binding.setConfig(new Config.Observable(config, name));
+        }
     }
 
     private void onConfigSaved(final Tunnel savedTunnel,
-                               final Throwable throwable) {
+                               @Nullable final Throwable throwable) {
         final String message;
         if (throwable == null) {
             message = getString(R.string.config_save_success, savedTunnel.getName());
@@ -64,7 +76,7 @@ public class TunnelEditorFragment extends BaseFragment {
     }
 
     @Override
-    public void onCreate(final Bundle savedInstanceState) {
+    public void onCreate(@Nullable final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setHasOptionsMenu(true);
     }
@@ -74,11 +86,54 @@ public class TunnelEditorFragment extends BaseFragment {
         inflater.inflate(R.menu.config_editor, menu);
     }
 
+    private final ObservableList.OnListChangedCallback<? extends ObservableList<Peer.Observable>> breakObjectListOrientedLayeringHandler = new ObservableList.OnListChangedCallback<ObservableList<Peer.Observable>>() {
+        @Override
+        public void onChanged(final ObservableList<Peer.Observable> sender) { }
+        @Override
+        public void onItemRangeChanged(final ObservableList<Peer.Observable> sender, final int positionStart, final int itemCount) { }
+        @Override
+        public void onItemRangeMoved(final ObservableList<Peer.Observable> sender, final int fromPosition, final int toPosition, final int itemCount) { }
+
+        @Override
+        public void onItemRangeInserted(final ObservableList<Peer.Observable> sender, final int positionStart, final int itemCount) {
+            breakObjectOrientedLayeringHandler.onPropertyChanged(binding.getConfig(), BR.peers);
+        }
+        @Override
+        public void onItemRangeRemoved(final ObservableList<Peer.Observable> sender, final int positionStart, final int itemCount) {
+            breakObjectOrientedLayeringHandler.onPropertyChanged(binding.getConfig(), BR.peers);
+        }
+    };
+
+    private final Observable.OnPropertyChangedCallback breakObjectOrientedLayeringHandler = new Observable.OnPropertyChangedCallback() {
+        @Override
+        public void onPropertyChanged(final Observable sender, final int propertyId) {
+            if (binding == null)
+                return;
+            final Config.Observable config = binding.getConfig();
+            if (config == null)
+                return;
+            if (propertyId == BR.config) {
+                config.addOnPropertyChangedCallback(breakObjectOrientedLayeringHandler);
+                config.getInterfaceSection().addOnPropertyChangedCallback(breakObjectOrientedLayeringHandler);
+                config.getPeers().addOnListChangedCallback(breakObjectListOrientedLayeringHandler);
+            } else if (propertyId == BR.dnses || propertyId == BR.peers)
+                ;
+            else
+                return;
+            final int numSiblings = config.getPeers().size() - 1;
+            for (final Peer.Observable peer : config.getPeers()) {
+                peer.setInterfaceDNSRoutes(config.getInterfaceSection().getDnses());
+                peer.setNumSiblings(numSiblings);
+            }
+        }
+    };
+
     @Override
-    public View onCreateView(@NonNull final LayoutInflater inflater, final ViewGroup container,
-                             final Bundle savedInstanceState) {
+    public View onCreateView(final LayoutInflater inflater, @Nullable final ViewGroup container,
+                             @Nullable final Bundle savedInstanceState) {
         super.onCreateView(inflater, container, savedInstanceState);
         binding = TunnelEditorFragmentBinding.inflate(inflater, container, false);
+        binding.addOnPropertyChangedCallback(breakObjectOrientedLayeringHandler);
         binding.executePendingBindings();
         return binding.getRoot();
     }
@@ -147,14 +202,14 @@ public class TunnelEditorFragment extends BaseFragment {
     }
 
     @Override
-    public void onSaveInstanceState(@NonNull final Bundle outState) {
+    public void onSaveInstanceState(final Bundle outState) {
         outState.putParcelable(KEY_LOCAL_CONFIG, binding.getConfig());
         outState.putString(KEY_ORIGINAL_NAME, tunnel == null ? null : tunnel.getName());
         super.onSaveInstanceState(outState);
     }
 
     @Override
-    public void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
+    public void onSelectedTunnelChanged(@Nullable final Tunnel oldTunnel, @Nullable final Tunnel newTunnel) {
         tunnel = newTunnel;
         if (binding == null)
             return;
@@ -163,7 +218,7 @@ public class TunnelEditorFragment extends BaseFragment {
             tunnel.getConfigAsync().thenAccept(a -> onConfigLoaded(tunnel.getName(), a));
     }
 
-    private void onTunnelCreated(final Tunnel newTunnel, final Throwable throwable) {
+    private void onTunnelCreated(final Tunnel newTunnel, @Nullable final Throwable throwable) {
         final String message;
         if (throwable == null) {
             tunnel = newTunnel;
@@ -182,7 +237,7 @@ public class TunnelEditorFragment extends BaseFragment {
     }
 
     private void onTunnelRenamed(final Tunnel renamedTunnel, final Config newConfig,
-                                 final Throwable throwable) {
+                                 @Nullable final Throwable throwable) {
         final String message;
         if (throwable == null) {
             message = getString(R.string.tunnel_rename_success, renamedTunnel.getName());
@@ -201,7 +256,13 @@ public class TunnelEditorFragment extends BaseFragment {
     }
 
     @Override
-    public void onViewStateRestored(final Bundle savedInstanceState) {
+    public void onViewStateRestored(@Nullable final Bundle savedInstanceState) {
+        if (binding == null) {
+            return;
+        }
+
+        binding.setFragment(this);
+
         if (savedInstanceState == null) {
             onSelectedTunnelChanged(null, getSelectedTunnel());
         } else {
@@ -216,4 +277,20 @@ public class TunnelEditorFragment extends BaseFragment {
 
         super.onViewStateRestored(savedInstanceState);
     }
+
+    public void onRequestSetExcludedApplications(@SuppressWarnings("unused") final View view) {
+        final FragmentManager fragmentManager = getFragmentManager();
+        if (fragmentManager != null && binding != null) {
+            final String[] excludedApps = Attribute.stringToList(binding.getConfig().getInterfaceSection().getExcludedApplications());
+            final AppListDialogFragment fragment = AppListDialogFragment.newInstance(excludedApps, this);
+            fragment.show(fragmentManager, null);
+        }
+    }
+
+    @Override
+    public void onExcludedAppsSelected(final List<String> excludedApps) {
+        Objects.requireNonNull(binding, "Tried to set excluded apps while no view was loaded");
+        binding.getConfig().getInterfaceSection().setExcludedApplications(Attribute.iterableToString(excludedApps));
+    }
+
 }

app/src/main/java/com/wireguard/android/fragment/TunnelListFragment.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.fragment;
@@ -16,27 +16,23 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.provider.OpenableColumns;
 import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.design.widget.Snackbar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.view.ActionMode;
 import android.util.Log;
-import android.util.SparseBooleanArray;
-import android.view.ActionMode;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.MotionEvent;
 import android.view.View;
-import android.view.View.OnTouchListener;
 import android.view.ViewGroup;
-import android.widget.AbsListView;
-import android.widget.AbsListView.MultiChoiceModeListener;
-import android.widget.AdapterView;
-import android.widget.AdapterView.OnItemClickListener;
-import android.widget.AdapterView.OnItemLongClickListener;
 
 import com.wireguard.android.Application;
 import com.wireguard.android.R;
 import com.wireguard.android.activity.TunnelCreatorActivity;
+import com.wireguard.android.databinding.ObservableKeyedRecyclerViewAdapter;
 import com.wireguard.android.databinding.TunnelListFragmentBinding;
+import com.wireguard.android.databinding.TunnelListItemBinding;
 import com.wireguard.android.model.Tunnel;
 import com.wireguard.android.util.ExceptionLoggers;
 import com.wireguard.config.Config;
@@ -47,13 +43,12 @@ import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
 import java9.util.concurrent.CompletableFuture;
-import java9.util.stream.Collectors;
-import java9.util.stream.IntStream;
 import java9.util.stream.StreamSupport;
 
 /**
@@ -64,22 +59,21 @@ public class TunnelListFragment extends BaseFragment {
     private static final int REQUEST_IMPORT = 1;
     private static final String TAG = "WireGuard/" + TunnelListFragment.class.getSimpleName();
 
-    private final MultiChoiceModeListener actionModeListener = new ActionModeListener();
-    private final ListViewCallbacks listViewCallbacks = new ListViewCallbacks();
-    private ActionMode actionMode;
-    private TunnelListFragmentBinding binding;
+    private final ActionModeListener actionModeListener = new ActionModeListener();
+    @Nullable private ActionMode actionMode;
+    @Nullable private TunnelListFragmentBinding binding;
 
     public boolean collapseActionMenu() {
-        if (binding.createMenu.isExpanded()) {
+        if (binding != null && binding.createMenu.isExpanded()) {
             binding.createMenu.collapse();
             return true;
         }
         return false;
     }
 
-    private void importTunnel(final Uri uri) {
+    private void importTunnel(@Nullable final Uri uri) {
         final Activity activity = getActivity();
-        if (activity == null)
+        if (activity == null || uri == null)
             return;
         final ContentResolver contentResolver = activity.getContentResolver();
 
@@ -171,10 +165,10 @@ public class TunnelListFragment extends BaseFragment {
     }
 
     @Override
-    public void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
+    public void onActivityResult(final int requestCode, final int resultCode, @Nullable final Intent data) {
         switch (requestCode) {
             case REQUEST_IMPORT:
-                if (resultCode == Activity.RESULT_OK)
+                if (resultCode == Activity.RESULT_OK && data != null)
                     importTunnel(data.getData());
                 return;
             default:
@@ -182,20 +176,19 @@ public class TunnelListFragment extends BaseFragment {
         }
     }
 
+    @SuppressLint("ClickableViewAccessibility")
     @Override
-    public void onCreate(final Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-    }
-
-    @Override
-    public View onCreateView(@NonNull final LayoutInflater inflater, final ViewGroup container,
-                             final Bundle savedInstanceState) {
+    public View onCreateView(@NonNull final LayoutInflater inflater, @Nullable final ViewGroup container,
+                             @Nullable final Bundle savedInstanceState) {
         super.onCreateView(inflater, container, savedInstanceState);
         binding = TunnelListFragmentBinding.inflate(inflater, container, false);
-        binding.tunnelList.setMultiChoiceModeListener(actionModeListener);
-        binding.tunnelList.setOnItemClickListener(listViewCallbacks);
-        binding.tunnelList.setOnItemLongClickListener(listViewCallbacks);
-        binding.tunnelList.setOnTouchListener(listViewCallbacks);
+
+        binding.tunnelList.setOnTouchListener((view, motionEvent) -> {
+            if (binding != null) {
+                binding.createMenu.collapse();
+            }
+            return false;
+        });
         binding.executePendingBindings();
         return binding.getRoot();
     }
@@ -223,16 +216,18 @@ public class TunnelListFragment extends BaseFragment {
 
     @Override
     public void onPause() {
-        binding.createMenu.collapse();
+        if (binding != null) {
+            binding.createMenu.collapse();
+        }
         super.onPause();
     }
 
     @Override
-    public void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
+    public void onSelectedTunnelChanged(@Nullable final Tunnel oldTunnel, @Nullable final Tunnel newTunnel) {
         // Do nothing.
     }
 
-    private void onTunnelDeletionFinished(final Integer count, final Throwable throwable) {
+    private void onTunnelDeletionFinished(final Integer count, @Nullable final Throwable throwable) {
         final String message;
         if (throwable == null) {
             message = getResources().getQuantityString(R.plurals.delete_success, count, count);
@@ -272,39 +267,62 @@ public class TunnelListFragment extends BaseFragment {
     }
 
     @Override
-    public void onViewStateRestored(final Bundle savedInstanceState) {
+    public void onViewStateRestored(@Nullable final Bundle savedInstanceState) {
         super.onViewStateRestored(savedInstanceState);
+
+        if (binding == null) {
+            return;
+        }
+
         binding.setFragment(this);
         binding.setTunnels(Application.getTunnelManager().getTunnels());
+        binding.setRowConfigurationHandler((ObservableKeyedRecyclerViewAdapter.RowConfigurationHandler<TunnelListItemBinding, Tunnel>) (binding, tunnel, position) -> {
+            binding.setFragment(this);
+            binding.getRoot().setOnClickListener(clicked -> {
+                if (actionMode == null) {
+                    setSelectedTunnel(tunnel);
+                } else {
+                    actionModeListener.toggleItemChecked(position);
+                }
+            });
+            binding.getRoot().setOnLongClickListener(clicked -> {
+                actionModeListener.toggleItemChecked(position);
+                return true;
+            });
+
+            binding.getRoot().setActivated(actionModeListener.checkedItems.contains(position));
+        });
     }
 
-    private final class ActionModeListener implements MultiChoiceModeListener {
-        private Resources resources;
-        private AbsListView tunnelList;
+    private final class ActionModeListener implements ActionMode.Callback {
+        private final Collection<Integer> checkedItems = new HashSet<>();
 
-        private IntStream getCheckedPositions() {
-            final SparseBooleanArray checkedItemPositions = tunnelList.getCheckedItemPositions();
-            return IntStream.range(0, checkedItemPositions.size())
-                    .filter(checkedItemPositions::valueAt)
-                    .map(checkedItemPositions::keyAt);
-        }
+        @Nullable private Resources resources;
 
         @Override
         public boolean onActionItemClicked(final ActionMode mode, final MenuItem item) {
             switch (item.getItemId()) {
                 case R.id.menu_action_delete:
-                    // Must operate in two steps: positions change once we start deleting things.
-                    final List<Tunnel> tunnelsToDelete = getCheckedPositions()
-                            .mapToObj(pos -> (Tunnel) tunnelList.getItemAtPosition(pos))
-                            .collect(Collectors.toList());
+                    final Collection<Tunnel> tunnelsToDelete = new ArrayList<>();
+                    for (final Integer position : checkedItems) {
+                        tunnelsToDelete.add(Application.getTunnelManager().getTunnels().get(position));
+                    }
+
                     final CompletableFuture[] futures = StreamSupport.stream(tunnelsToDelete)
                             .map(Tunnel::delete)
                             .toArray(CompletableFuture[]::new);
                     CompletableFuture.allOf(futures)
                             .thenApply(x -> futures.length)
                             .whenComplete(TunnelListFragment.this::onTunnelDeletionFinished);
+
+                    checkedItems.clear();
                     mode.finish();
                     return true;
+                case R.id.menu_action_select_all:
+                    for (int i = 0; i < Application.getTunnelManager().getTunnels().size(); ++i) {
+                        setItemChecked(i, true);
+                    }
+                    return true;
                 default:
                     return false;
             }
@@ -313,9 +331,9 @@ public class TunnelListFragment extends BaseFragment {
         @Override
         public boolean onCreateActionMode(final ActionMode mode, final Menu menu) {
             actionMode = mode;
-            if (getActivity() != null)
+            if (getActivity() != null) {
                 resources = getActivity().getResources();
-            tunnelList = binding.tunnelList;
+            }
             mode.getMenuInflater().inflate(R.menu.tunnel_list_action_mode, menu);
             return true;
         }
@@ -324,12 +342,33 @@ public class TunnelListFragment extends BaseFragment {
         public void onDestroyActionMode(final ActionMode mode) {
             actionMode = null;
             resources = null;
+
+            checkedItems.clear();
+            binding.tunnelList.getAdapter().notifyDataSetChanged();
         }
 
-        @Override
-        public void onItemCheckedStateChanged(final ActionMode mode, final int position,
-                                              final long id, final boolean checked) {
-            updateTitle(mode);
+        void toggleItemChecked(final int position) {
+            setItemChecked(position, !checkedItems.contains(position));
+        }
+
+        void setItemChecked(final int position, final boolean checked) {
+            if (checked) {
+                checkedItems.add(position);
+            } else {
+                checkedItems.remove(position);
+            }
+
+            if (actionMode == null && !checkedItems.isEmpty() && getActivity() != null) {
+                ((AppCompatActivity) getActivity()).startSupportActionMode(this);
+            } else if (actionMode != null && checkedItems.isEmpty()) {
+                actionMode.finish();
+            }
+
+            if (binding != null) {
+                binding.tunnelList.getAdapter().notifyItemChanged(position);
+            }
+
+            updateTitle(actionMode);
         }
 
         @Override
@@ -338,8 +377,12 @@ public class TunnelListFragment extends BaseFragment {
             return false;
         }
 
-        private void updateTitle(final ActionMode mode) {
-            final int count = (int) getCheckedPositions().count();
+        private void updateTitle(@Nullable final ActionMode mode) {
+            if (mode == null) {
+                return;
+            }
+
+            final int count = checkedItems.size();
             if (count == 0) {
                 mode.setTitle("");
             } else {
@@ -348,30 +391,4 @@ public class TunnelListFragment extends BaseFragment {
         }
     }
 
-    private final class ListViewCallbacks
-            implements OnItemClickListener, OnItemLongClickListener, OnTouchListener {
-        @Override
-        public void onItemClick(final AdapterView<?> parent, final View view,
-                                final int position, final long id) {
-            setSelectedTunnel((Tunnel) parent.getItemAtPosition(position));
-        }
-
-        @Override
-        public boolean onItemLongClick(final AdapterView<?> parent, final View view,
-                                       final int position, final long id) {
-            if (actionMode != null)
-                return false;
-            if (binding != null)
-                binding.tunnelList.setItemChecked(position, true);
-            return true;
-        }
-
-        @Override
-        @SuppressLint("ClickableViewAccessibility")
-        public boolean onTouch(final View view, final MotionEvent motionEvent) {
-            if (binding != null)
-                binding.createMenu.collapse();
-            return false;
-        }
-    }
 }

app/src/main/java/com/wireguard/android/model/ApplicationData.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright © 2018 Eric Kuck <eric@bluelinelabs.com>.
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.android.model;
+
+import android.databinding.BaseObservable;
+import android.databinding.Bindable;
+import android.graphics.drawable.Drawable;
+
+import com.wireguard.android.BR;
+import com.wireguard.util.Keyed;
+
+public class ApplicationData extends BaseObservable implements Keyed<String> {
+
+    private final Drawable icon;
+    private final String name;
+    private final String packageName;
+    private boolean excludedFromTunnel;
+
+    public ApplicationData(final Drawable icon, final String name, final String packageName, final boolean excludedFromTunnel) {
+        this.icon = icon;
+        this.name = name;
+        this.packageName = packageName;
+        this.excludedFromTunnel = excludedFromTunnel;
+    }
+
+    public Drawable getIcon() {
+        return icon;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getPackageName() {
+        return packageName;
+    }
+
+    @Bindable
+    public boolean isExcludedFromTunnel() {
+        return excludedFromTunnel;
+    }
+
+    public void setExcludedFromTunnel(final boolean excludedFromTunnel) {
+        this.excludedFromTunnel = excludedFromTunnel;
+        notifyPropertyChanged(BR.excludedFromTunnel);
+    }
+
+    @Override
+    public String getKey() {
+        return name;
+    }
+}

app/src/main/java/com/wireguard/android/model/Tunnel.java

@@ -1,20 +1,19 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.model;
 
 import android.databinding.BaseObservable;
 import android.databinding.Bindable;
-import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
 import com.wireguard.android.BR;
 import com.wireguard.android.util.ExceptionLoggers;
-import com.wireguard.util.Keyed;
 import com.wireguard.config.Config;
+import com.wireguard.util.Keyed;
 
 import java.util.regex.Pattern;
 
@@ -30,20 +29,20 @@ public class Tunnel extends BaseObservable implements Keyed<String> {
     private static final Pattern NAME_PATTERN = Pattern.compile("[a-zA-Z0-9_=+.-]{1,15}");
 
     private final TunnelManager manager;
-    private Config config;
+    @Nullable private Config config;
     private String name;
     private State state;
-    private Statistics statistics;
+    @Nullable private Statistics statistics;
 
-    Tunnel(@NonNull final TunnelManager manager, @NonNull final String name,
-           @Nullable final Config config, @NonNull final State state) {
+    Tunnel(final TunnelManager manager, final String name,
+           @Nullable final Config config, final State state) {
         this.manager = manager;
         this.name = name;
         this.config = config;
         this.state = state;
     }
 
-    public static boolean isNameInvalid(@NonNull final CharSequence name) {
+    public static boolean isNameInvalid(final CharSequence name) {
         return !NAME_PATTERN.matcher(name).matches();
     }
 
@@ -51,7 +50,7 @@ public class Tunnel extends BaseObservable implements Keyed<String> {
         return manager.delete(this);
     }
 
-    @Bindable
+    @Bindable @Nullable
     public Config getConfig() {
         if (config == null)
             manager.getTunnelConfig(this).whenComplete(ExceptionLoggers.E);
@@ -80,21 +79,21 @@ public class Tunnel extends BaseObservable implements Keyed<String> {
     }
 
     public CompletionStage<State> getStateAsync() {
-        return manager.getTunnelState(this);
+        return TunnelManager.getTunnelState(this);
     }
 
-    @Bindable
+    @Bindable @Nullable
     public Statistics getStatistics() {
         // FIXME: Check age of statistics.
         if (statistics == null)
-            manager.getTunnelStatistics(this).whenComplete(ExceptionLoggers.E);
+            TunnelManager.getTunnelStatistics(this).whenComplete(ExceptionLoggers.E);
         return statistics;
     }
 
     public CompletionStage<Statistics> getStatisticsAsync() {
         // FIXME: Check age of statistics.
         if (statistics == null)
-            return manager.getTunnelStatistics(this);
+            return TunnelManager.getTunnelStatistics(this);
         return CompletableFuture.completedFuture(statistics);
     }
 
@@ -118,25 +117,26 @@ public class Tunnel extends BaseObservable implements Keyed<String> {
         return state;
     }
 
-    Statistics onStatisticsChanged(final Statistics statistics) {
+    @Nullable
+    Statistics onStatisticsChanged(@Nullable final Statistics statistics) {
         this.statistics = statistics;
         notifyPropertyChanged(BR.statistics);
         return statistics;
     }
 
-    public CompletionStage<Config> setConfig(@NonNull final Config config) {
+    public CompletionStage<Config> setConfig(final Config config) {
         if (!config.equals(this.config))
             return manager.setTunnelConfig(this, config);
         return CompletableFuture.completedFuture(this.config);
     }
 
-    public CompletionStage<String> setName(@NonNull final String name) {
+    public CompletionStage<String> setName(final String name) {
         if (!name.equals(this.name))
             return manager.setTunnelName(this, name);
         return CompletableFuture.completedFuture(this.name);
     }
 
-    public CompletionStage<State> setState(@NonNull final State state) {
+    public CompletionStage<State> setState(final State state) {
         if (state != this.state)
             return manager.setTunnelState(this, state);
         return CompletableFuture.completedFuture(this.state);
@@ -152,6 +152,5 @@ public class Tunnel extends BaseObservable implements Keyed<String> {
         }
     }
 
-    public static class Statistics extends BaseObservable {
-    }
+    public static class Statistics extends BaseObservable { }
 }

app/src/main/java/com/wireguard/android/model/TunnelManager.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.model;
@@ -11,7 +11,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.databinding.BaseObservable;
 import android.databinding.Bindable;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 
 import com.wireguard.android.Application;
 import com.wireguard.android.BR;
@@ -47,9 +47,8 @@ public final class TunnelManager extends BaseObservable {
     private static final String KEY_RUNNING_TUNNELS = "enabled_configs";
 
     private final ConfigStore configStore;
-    private final ObservableSortedKeyedList<String, Tunnel> tunnels =
-            new ObservableSortedKeyedArrayList<>(COMPARATOR);
-    private Tunnel lastUsedTunnel;
+    private final ObservableSortedKeyedList<String, Tunnel> tunnels = new ObservableSortedKeyedArrayList<>(COMPARATOR);
+    @Nullable private Tunnel lastUsedTunnel;
     private boolean haveLoaded;
     private final ArrayList<CompletableFuture<Void>> delayedLoadRestoreTunnels = new ArrayList<>();
 
@@ -57,13 +56,13 @@ public final class TunnelManager extends BaseObservable {
         this.configStore = configStore;
     }
 
-    private Tunnel addToList(final String name, final Config config, final State state) {
+    private Tunnel addToList(final String name, @Nullable final Config config, final State state) {
         final Tunnel tunnel = new Tunnel(this, name, config, state);
         tunnels.add(tunnel);
         return tunnel;
     }
 
-    public CompletionStage<Tunnel> create(@NonNull final String name, final Config config) {
+    public CompletionStage<Tunnel> create(final String name, @Nullable final Config config) {
         if (Tunnel.isNameInvalid(name))
             return CompletableFuture.failedFuture(new IllegalArgumentException("Invalid name"));
         if (tunnels.containsKey(name)) {
@@ -102,7 +101,7 @@ public final class TunnelManager extends BaseObservable {
         });
     }
 
-    @Bindable
+    @Bindable @Nullable
     public Tunnel getLastUsedTunnel() {
         return lastUsedTunnel;
     }
@@ -112,12 +111,12 @@ public final class TunnelManager extends BaseObservable {
                 .thenApply(tunnel::onConfigChanged);
     }
 
-    CompletionStage<State> getTunnelState(final Tunnel tunnel) {
+    static CompletionStage<State> getTunnelState(final Tunnel tunnel) {
         return Application.getAsyncWorker().supplyAsync(() -> Application.getBackend().getState(tunnel))
                 .thenApply(tunnel::onStateChanged);
     }
 
-    CompletionStage<Statistics> getTunnelStatistics(final Tunnel tunnel) {
+    static CompletionStage<Statistics> getTunnelStatistics(final Tunnel tunnel) {
         return Application.getAsyncWorker().supplyAsync(() -> Application.getBackend().getStatistics(tunnel))
                 .thenApply(tunnel::onStatisticsChanged);
     }
@@ -191,7 +190,7 @@ public final class TunnelManager extends BaseObservable {
         Application.getSharedPreferences().edit().putStringSet(KEY_RUNNING_TUNNELS, runningTunnels).apply();
     }
 
-    private void setLastUsedTunnel(final Tunnel tunnel) {
+    private void setLastUsedTunnel(@Nullable final Tunnel tunnel) {
         if (tunnel == lastUsedTunnel)
             return;
         lastUsedTunnel = tunnel;
@@ -256,7 +255,7 @@ public final class TunnelManager extends BaseObservable {
 
     public static final class IntentReceiver extends BroadcastReceiver {
         @Override
-        public void onReceive(final Context context, final Intent intent) {
+        public void onReceive(final Context context, @Nullable final Intent intent) {
             final TunnelManager manager = Application.getTunnelManager();
             if (intent == null)
                 return;

app/src/main/java/com/wireguard/android/preference/LogExporterPreference.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.preference;
@@ -10,6 +10,7 @@ import android.Manifest;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Environment;
+import android.support.annotation.Nullable;
 import android.support.design.widget.Snackbar;
 import android.support.v7.preference.Preference;
 import android.util.AttributeSet;
@@ -33,7 +34,7 @@ import java.io.InputStreamReader;
 public class LogExporterPreference extends Preference {
     private static final String TAG = "WireGuard/" + LogExporterPreference.class.getSimpleName();
 
-    private String exportedFilePath;
+    @Nullable private String exportedFilePath;
 
     public LogExporterPreference(final Context context, final AttributeSet attrs) {
         super(context, attrs);
@@ -73,7 +74,7 @@ public class LogExporterPreference extends Preference {
         }).whenComplete(this::exportLogComplete);
     }
 
-    private void exportLogComplete(final String filePath, final Throwable throwable) {
+    private void exportLogComplete(final String filePath, @Nullable final Throwable throwable) {
         if (throwable != null) {
             final String error = ExceptionLoggers.unwrapMessage(throwable);
             final String message = getContext().getString(R.string.log_export_error, error);

app/src/main/java/com/wireguard/android/preference/ToolsInstallerPreference.java

@@ -1,13 +1,13 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.preference;
 
 import android.content.Context;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.v7.preference.Preference;
 import android.util.AttributeSet;
 
@@ -43,7 +43,7 @@ public class ToolsInstallerPreference extends Preference {
         Application.getAsyncWorker().supplyAsync(Application.getToolsInstaller()::areInstalled).whenComplete(this::onCheckResult);
     }
 
-    private void onCheckResult(final int state, final Throwable throwable) {
+    private void onCheckResult(final int state, @Nullable final Throwable throwable) {
         if (throwable != null || state == ToolsInstaller.ERROR)
             setState(State.INITIAL);
         else if ((state & ToolsInstaller.YES) == ToolsInstaller.YES)
@@ -62,7 +62,7 @@ public class ToolsInstallerPreference extends Preference {
         Application.getAsyncWorker().supplyAsync(Application.getToolsInstaller()::install).whenComplete(this::onInstallResult);
     }
 
-    private void onInstallResult(final Integer result, final Throwable throwable) {
+    private void onInstallResult(final Integer result, @Nullable final Throwable throwable) {
         if (throwable != null)
             setState(State.FAILURE);
         else if ((result & (ToolsInstaller.YES | ToolsInstaller.MAGISK)) == (ToolsInstaller.YES | ToolsInstaller.MAGISK))
@@ -73,7 +73,7 @@ public class ToolsInstallerPreference extends Preference {
             setState(State.FAILURE);
     }
 
-    private void setState(@NonNull final State state) {
+    private void setState(final State state) {
         if (this.state == state)
             return;
         this.state = state;

app/src/main/java/com/wireguard/android/preference/VersionPreference.java

@@ -1,13 +1,15 @@
 /*
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.preference;
 
+import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.support.annotation.Nullable;
 import android.support.v7.preference.Preference;
 import android.util.AttributeSet;
 
@@ -16,7 +18,7 @@ import com.wireguard.android.BuildConfig;
 import com.wireguard.android.R;
 
 public class VersionPreference extends Preference {
-    private String versionSummary;
+    @Nullable private String versionSummary;
 
     public VersionPreference(final Context context, final AttributeSet attrs) {
         super(context, attrs);
@@ -32,7 +34,7 @@ public class VersionPreference extends Preference {
         });
     }
 
-    @Override
+    @Override @Nullable
     public CharSequence getSummary() {
         return versionSummary;
     }
@@ -46,7 +48,9 @@ public class VersionPreference extends Preference {
     protected void onClick() {
         final Intent intent = new Intent(Intent.ACTION_VIEW);
         intent.setData(Uri.parse("https://www.wireguard.com/"));
-        getContext().startActivity(intent);
+        try {
+            getContext().startActivity(intent);
+        } catch (final ActivityNotFoundException ignored) { }
     }
 
 }

app/src/main/java/com/wireguard/android/preference/ZipExporterPreference.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.preference;
@@ -10,6 +10,7 @@ import android.Manifest;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Environment;
+import android.support.annotation.Nullable;
 import android.support.design.widget.Snackbar;
 import android.support.v7.preference.Preference;
 import android.util.AttributeSet;
@@ -40,7 +41,7 @@ import java9.util.concurrent.CompletableFuture;
 public class ZipExporterPreference extends Preference {
     private static final String TAG = "WireGuard/" + ZipExporterPreference.class.getSimpleName();
 
-    private String exportedFilePath;
+    @Nullable private String exportedFilePath;
 
     public ZipExporterPreference(final Context context, final AttributeSet attrs) {
         super(context, attrs);
@@ -79,7 +80,7 @@ public class ZipExporterPreference extends Preference {
                 }).whenComplete(this::exportZipComplete));
     }
 
-    private void exportZipComplete(final String filePath, final Throwable throwable) {
+    private void exportZipComplete(@Nullable final String filePath, @Nullable final Throwable throwable) {
         if (throwable != null) {
             final String error = ExceptionLoggers.unwrapMessage(throwable);
             final String message = getContext().getString(R.string.zip_export_error, error);

app/src/main/java/com/wireguard/android/util/AsyncWorker.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;

app/src/main/java/com/wireguard/android/util/ClipboardUtils.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;

app/src/main/java/com/wireguard/android/util/ExceptionLoggers.java

@@ -1,13 +1,14 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;
 
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.util.Log;
+
 import java9.util.concurrent.CompletionException;
 import java9.util.function.BiConsumer;
 
@@ -34,7 +35,6 @@ public enum ExceptionLoggers implements BiConsumer<Object, Throwable> {
         return throwable;
     }
 
-    @NonNull
     public static String unwrapMessage(Throwable throwable) {
         throwable = unwrap(throwable);
         final String message = throwable.getMessage();
@@ -44,7 +44,7 @@ public enum ExceptionLoggers implements BiConsumer<Object, Throwable> {
     }
 
     @Override
-    public void accept(final Object result, final Throwable throwable) {
+    public void accept(final Object result, @Nullable final Throwable throwable) {
         if (throwable != null)
             Log.println(Log.ERROR, TAG, Log.getStackTraceString(throwable));
         else if (priority <= Log.DEBUG)

app/src/main/java/com/wireguard/android/util/FragmentUtils.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Harsh Shandilya <msfjarvis@gmail.com>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 package com.wireguard.android.util;
 

app/src/main/java/com/wireguard/android/util/ObservableKeyedArrayList.java

@@ -1,13 +1,13 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;
 
 import android.databinding.ObservableArrayList;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 
 import com.wireguard.util.Keyed;
 
@@ -25,28 +25,28 @@ import java.util.Objects;
 public class ObservableKeyedArrayList<K, E extends Keyed<? extends K>>
         extends ObservableArrayList<E> implements ObservableKeyedList<K, E> {
     @Override
-    public boolean add(final E e) {
+    public boolean add(@Nullable final E e) {
         if (e == null)
             throw new NullPointerException("Trying to add a null element");
         return super.add(e);
     }
 
     @Override
-    public void add(final int index, final E e) {
+    public void add(final int index, @Nullable final E e) {
         if (e == null)
             throw new NullPointerException("Trying to add a null element");
         super.add(index, e);
     }
 
     @Override
-    public boolean addAll(@NonNull final Collection<? extends E> c) {
+    public boolean addAll(final Collection<? extends E> c) {
         if (c.contains(null))
             throw new NullPointerException("Trying to add a collection with null element(s)");
         return super.addAll(c);
     }
 
     @Override
-    public boolean addAll(final int index, @NonNull final Collection<? extends E> c) {
+    public boolean addAll(final int index, final Collection<? extends E> c) {
         if (c.contains(null))
             throw new NullPointerException("Trying to add a collection with null element(s)");
         return super.addAll(index, c);
@@ -65,13 +65,13 @@ public class ObservableKeyedArrayList<K, E extends Keyed<? extends K>>
         return indexOfKey(key) >= 0;
     }
 
-    @Override
+    @Override @Nullable
     public E get(final K key) {
         final int index = indexOfKey(key);
         return index >= 0 ? get(index) : null;
     }
 
-    @Override
+    @Override @Nullable
     public E getLast(final K key) {
         final int index = lastIndexOfKey(key);
         return index >= 0 ? get(index) : null;
@@ -100,7 +100,7 @@ public class ObservableKeyedArrayList<K, E extends Keyed<? extends K>>
     }
 
     @Override
-    public E set(final int index, final E e) {
+    public E set(final int index, @Nullable final E e) {
         if (e == null)
             throw new NullPointerException("Trying to set a null key");
         return super.set(index, e);

app/src/main/java/com/wireguard/android/util/ObservableKeyedList.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;

app/src/main/java/com/wireguard/android/util/ObservableSortedKeyedArrayList.java

@@ -1,12 +1,12 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;
 
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 
 import com.wireguard.util.Keyed;
 import com.wireguard.util.SortedKeyedList;
@@ -29,6 +29,7 @@ import java.util.Spliterator;
 
 public class ObservableSortedKeyedArrayList<K, E extends Keyed<? extends K>>
         extends ObservableKeyedArrayList<K, E> implements ObservableSortedKeyedList<K, E> {
+    @Nullable
     private final Comparator<? super K> comparator;
     private final transient KeyList<K, E> keyList = new KeyList<>(this);
 
@@ -75,7 +76,7 @@ public class ObservableSortedKeyedArrayList<K, E extends Keyed<? extends K>>
     }
 
     @Override
-    public boolean addAll(@NonNull final Collection<? extends E> c) {
+    public boolean addAll(final Collection<? extends E> c) {
         boolean didChange = false;
         for (final E e : c)
             if (add(e))
@@ -84,12 +85,13 @@ public class ObservableSortedKeyedArrayList<K, E extends Keyed<? extends K>>
     }
 
     @Override
-    public boolean addAll(int index, @NonNull final Collection<? extends E> c) {
+    public boolean addAll(int index, final Collection<? extends E> c) {
         for (final E e : c)
             add(index++, e);
         return true;
     }
 
+    @Nullable
     @Override
     public Comparator<? super K> comparator() {
         return comparator;
@@ -128,7 +130,6 @@ public class ObservableSortedKeyedArrayList<K, E extends Keyed<? extends K>>
     }
 
     @Override
-    @NonNull
     public Set<K> keySet() {
         return keyList;
     }
@@ -168,7 +169,6 @@ public class ObservableSortedKeyedArrayList<K, E extends Keyed<? extends K>>
     }
 
     @Override
-    @NonNull
     public Collection<E> values() {
         return this;
     }

app/src/main/java/com/wireguard/android/util/ObservableSortedKeyedList.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;

app/src/main/java/com/wireguard/android/util/RootShell.java

@@ -1,12 +1,13 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;
 
 import android.content.Context;
+import android.support.annotation.Nullable;
 import android.util.Log;
 
 import com.wireguard.android.R;
@@ -34,10 +35,10 @@ public class RootShell {
     private final File localTemporaryDir;
     private final Object lock = new Object();
     private final String preamble;
-    private Process process;
-    private BufferedReader stderr;
-    private OutputStreamWriter stdin;
-    private BufferedReader stdout;
+    @Nullable private Process process;
+    @Nullable private BufferedReader stderr;
+    @Nullable private OutputStreamWriter stdin;
+    @Nullable private BufferedReader stdout;
 
     public RootShell(final Context context) {
         deviceNotRootedMessage = context.getString(R.string.error_root);
@@ -80,7 +81,7 @@ public class RootShell {
      * @param command Command to run as root.
      * @return The exit value of the command.
      */
-    public int run(final Collection<String> output, final String command)
+    public int run(@Nullable final Collection<String> output, final String command)
             throws IOException, NoRootException {
         synchronized (lock) {
             /* Start inside synchronized block to prevent a concurrent call to stop(). */

app/src/main/java/com/wireguard/android/util/SharedLibraryLoader.java

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;
@@ -19,8 +19,7 @@ import java.util.zip.ZipFile;
 public final class SharedLibraryLoader {
     private static final String TAG = "WireGuard/" + SharedLibraryLoader.class.getSimpleName();
 
-    private SharedLibraryLoader() {
-    }
+    private SharedLibraryLoader() { }
 
     public static void loadSharedLibrary(final Context context, final String libName) {
         Throwable noAbiException;

app/src/main/java/com/wireguard/android/util/ToolsInstaller.java

@@ -1,12 +1,13 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util;
 
 import android.content.Context;
+import android.support.annotation.Nullable;
 import android.system.OsConstants;
 import android.util.Log;
 
@@ -39,20 +40,21 @@ public final class ToolsInstaller {
             new File("/system/xbin"),
             new File("/system/bin"),
     };
-    private static final File INSTALL_DIR = getInstallDir();
+    @Nullable private static final File INSTALL_DIR = getInstallDir();
     private static final String TAG = "WireGuard/" + ToolsInstaller.class.getSimpleName();
 
     private final File localBinaryDir;
     private final Object lock = new Object();
     private final File nativeLibraryDir;
-    private Boolean areToolsAvailable;
-    private Boolean installAsMagiskModule;
+    @Nullable private Boolean areToolsAvailable;
+    @Nullable private Boolean installAsMagiskModule;
 
     public ToolsInstaller(final Context context) {
         localBinaryDir = new File(context.getCacheDir(), "bin");
         nativeLibraryDir = new File(context.getApplicationInfo().nativeLibraryDir);
     }
 
+    @Nullable
     private static File getInstallDir() {
         final String path = System.getenv("PATH");
         if (path == null)

app/src/main/java/com/wireguard/android/widget/KeyInputFilter.java

@@ -1,11 +1,12 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.widget;
 
+import android.support.annotation.Nullable;
 import android.text.InputFilter;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
@@ -25,7 +26,7 @@ public class KeyInputFilter implements InputFilter {
         return new KeyInputFilter();
     }
 
-    @Override
+    @Override @Nullable
     public CharSequence filter(final CharSequence source,
                                final int sStart, final int sEnd,
                                final Spanned dest,

app/src/main/java/com/wireguard/android/widget/NameInputFilter.java

@@ -1,11 +1,12 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.widget;
 
+import android.support.annotation.Nullable;
 import android.text.InputFilter;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
@@ -25,7 +26,7 @@ public class NameInputFilter implements InputFilter {
         return new NameInputFilter();
     }
 
-    @Override
+    @Override @Nullable
     public CharSequence filter(final CharSequence source,
                                final int sStart, final int sEnd,
                                final Spanned dest,

app/src/main/java/com/wireguard/android/widget/SlashDrawable.java

@@ -0,0 +1,221 @@
+/*
+ * Copyright © 2018 The Android Open Source Project
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.android.widget;
+
+import android.animation.ObjectAnimator;
+import android.animation.ValueAnimator;
+import android.annotation.TargetApi;
+import android.content.res.ColorStateList;
+import android.graphics.Canvas;
+import android.graphics.ColorFilter;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.Path.Direction;
+import android.graphics.PixelFormat;
+import android.graphics.PorterDuff.Mode;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.Region;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.support.annotation.ColorInt;
+import android.support.annotation.IntRange;
+import android.support.annotation.Nullable;
+import android.util.FloatProperty;
+
+@TargetApi(Build.VERSION_CODES.N)
+public class SlashDrawable extends Drawable {
+
+    private static final float CORNER_RADIUS = Build.VERSION.SDK_INT < Build.VERSION_CODES.O ? 0f : 1f;
+    private static final long QS_ANIM_LENGTH = 350;
+
+    private final Path mPath = new Path();
+    private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+
+    // These values are derived in un-rotated (vertical) orientation
+    private static final float SLASH_WIDTH = 1.8384776f;
+    private static final float SLASH_HEIGHT = 28f;
+    private static final float CENTER_X = 10.65f;
+    private static final float CENTER_Y = 11.869239f;
+    private static final float SCALE = 24f;
+
+    // Bottom is derived during animation
+    private static final float LEFT = (CENTER_X - (SLASH_WIDTH / 2)) / SCALE;
+    private static final float TOP = (CENTER_Y - (SLASH_HEIGHT / 2)) / SCALE;
+    private static final float RIGHT = (CENTER_X + (SLASH_WIDTH / 2)) / SCALE;
+    // Draw the slash washington-monument style; rotate to no-u-turn style
+    private static final float DEFAULT_ROTATION = -45f;
+
+    private final Drawable mDrawable;
+    private final RectF mSlashRect = new RectF(0, 0, 0, 0);
+    private float mRotation;
+    private boolean mSlashed;
+    private boolean mAnimationEnabled = true;
+
+    public SlashDrawable(final Drawable d) {
+        mDrawable = d;
+    }
+
+    @Override
+    public int getIntrinsicHeight() {
+        return mDrawable.getIntrinsicHeight();
+    }
+
+    @Override
+    public int getIntrinsicWidth() {
+        return mDrawable.getIntrinsicWidth();
+    }
+
+    @Override
+    protected void onBoundsChange(final Rect bounds) {
+        super.onBoundsChange(bounds);
+        mDrawable.setBounds(bounds);
+    }
+
+    public void setRotation(final float rotation) {
+        if (mRotation == rotation)
+            return;
+        mRotation = rotation;
+        invalidateSelf();
+    }
+
+    public void setAnimationEnabled(final boolean enabled) {
+        mAnimationEnabled = enabled;
+    }
+
+    // Animate this value on change
+    private float mCurrentSlashLength;
+    private static final FloatProperty mSlashLengthProp = new FloatProperty<SlashDrawable>("slashLength") {
+        @Override
+        public void setValue(final SlashDrawable object, final float value) {
+            object.mCurrentSlashLength = value;
+        }
+
+        @Override
+        public Float get(final SlashDrawable object) {
+            return object.mCurrentSlashLength;
+        }
+    };
+
+    @SuppressWarnings("unchecked")
+    public void setSlashed(final boolean slashed) {
+        if (mSlashed == slashed) return;
+
+        mSlashed = slashed;
+
+        final float end = mSlashed ? SLASH_HEIGHT / SCALE : 0f;
+        final float start = mSlashed ? 0f : SLASH_HEIGHT / SCALE;
+
+        if (mAnimationEnabled) {
+            final ObjectAnimator anim = ObjectAnimator.ofFloat(this, mSlashLengthProp, start, end);
+            anim.addUpdateListener((ValueAnimator valueAnimator) -> invalidateSelf());
+            anim.setDuration(QS_ANIM_LENGTH);
+            anim.start();
+        } else {
+            mCurrentSlashLength = end;
+            invalidateSelf();
+        }
+    }
+
+    @SuppressWarnings("deprecation")
+    @Override
+    public void draw(final Canvas canvas) {
+        canvas.save();
+        final Matrix m = new Matrix();
+        final int width = getBounds().width();
+        final int height = getBounds().height();
+        final float radiusX = scale(CORNER_RADIUS, width);
+        final float radiusY = scale(CORNER_RADIUS, height);
+        updateRect(
+                scale(LEFT, width),
+                scale(TOP, height),
+                scale(RIGHT, width),
+                scale(TOP + mCurrentSlashLength, height)
+        );
+
+        mPath.reset();
+        // Draw the slash vertically
+        mPath.addRoundRect(mSlashRect, radiusX, radiusY, Direction.CW);
+        // Rotate -45 + desired rotation
+        m.setRotate(mRotation + DEFAULT_ROTATION, width / 2, height / 2);
+        mPath.transform(m);
+        canvas.drawPath(mPath, mPaint);
+
+        // Rotate back to vertical
+        m.setRotate(-mRotation - DEFAULT_ROTATION, width / 2, height / 2);
+        mPath.transform(m);
+
+        // Draw another rect right next to the first, for clipping
+        m.setTranslate(mSlashRect.width(), 0);
+        mPath.transform(m);
+        mPath.addRoundRect(mSlashRect, 1.0f * width, 1.0f * height, Direction.CW);
+        m.setRotate(mRotation + DEFAULT_ROTATION, width / 2, height / 2);
+        mPath.transform(m);
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O)
+            canvas.clipPath(mPath, Region.Op.DIFFERENCE);
+        else
+            canvas.clipOutPath(mPath);
+
+        mDrawable.draw(canvas);
+        canvas.restore();
+    }
+
+    private float scale(final float frac, final int width) {
+        return frac * width;
+    }
+
+    private void updateRect(final float left, final float top, final float right, final float bottom) {
+        mSlashRect.left = left;
+        mSlashRect.top = top;
+        mSlashRect.right = right;
+        mSlashRect.bottom = bottom;
+    }
+
+    @Override
+    public void setTint(@ColorInt final int tintColor) {
+        super.setTint(tintColor);
+        mDrawable.setTint(tintColor);
+        mPaint.setColor(tintColor);
+    }
+
+    @Override
+    public void setTintList(@Nullable final ColorStateList tint) {
+        super.setTintList(tint);
+        setDrawableTintList(tint);
+        mPaint.setColor(tint == null ? 0 : tint.getDefaultColor());
+        invalidateSelf();
+    }
+
+    private void setDrawableTintList(@Nullable final ColorStateList tint) {
+        mDrawable.setTintList(tint);
+    }
+
+    @Override
+    public void setTintMode(final Mode tintMode) {
+        super.setTintMode(tintMode);
+        mDrawable.setTintMode(tintMode);
+    }
+
+    @Override
+    public void setAlpha(@IntRange(from = 0, to = 255) final int alpha) {
+        mDrawable.setAlpha(alpha);
+        mPaint.setAlpha(alpha);
+    }
+
+    @Override
+    public void setColorFilter(@Nullable final ColorFilter colorFilter) {
+        mDrawable.setColorFilter(colorFilter);
+        mPaint.setColorFilter(colorFilter);
+    }
+
+    @Override
+    public int getOpacity() {
+        return PixelFormat.OPAQUE;
+    }
+}

app/src/main/java/com/wireguard/android/widget/ToggleSwitch.java

@@ -7,22 +7,23 @@ package com.wireguard.android.widget;
 
 import android.content.Context;
 import android.os.Parcelable;
+import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.widget.Switch;
 
 public class ToggleSwitch extends Switch {
     private boolean isRestoringState;
-    private OnBeforeCheckedChangeListener listener;
-
-    @SuppressWarnings({"SameParameterValue", "WeakerAccess"})
-    public ToggleSwitch(final Context context, final AttributeSet attrs) {
-        super(context, attrs);
-    }
+    @Nullable private OnBeforeCheckedChangeListener listener;
 
     public ToggleSwitch(final Context context) {
         this(context, null);
     }
 
+    @SuppressWarnings({"SameParameterValue", "WeakerAccess"})
+    public ToggleSwitch(final Context context, @Nullable final AttributeSet attrs) {
+        super(context, attrs);
+    }
+
     @Override
     public void onRestoreInstanceState(final Parcelable state) {
         isRestoringState = true;

app/src/main/java/com/wireguard/android/widget/fab/AddFloatingActionButton.java

@@ -1,97 +0,0 @@
-/*
- * Copyright © 2014 Jerzy Chalupski
- * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
-package com.wireguard.android.widget.fab;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.graphics.Canvas;
-import android.graphics.Paint;
-import android.graphics.Paint.Style;
-import android.graphics.drawable.Drawable;
-import android.graphics.drawable.ShapeDrawable;
-import android.graphics.drawable.shapes.Shape;
-import android.support.annotation.ColorRes;
-import android.support.annotation.DrawableRes;
-import android.support.v4.content.ContextCompat;
-import android.util.AttributeSet;
-
-import com.wireguard.android.R;
-
-public class AddFloatingActionButton extends FloatingActionButton {
-    int mPlusColor;
-
-    public AddFloatingActionButton(final Context context) {
-        this(context, null);
-    }
-
-    public AddFloatingActionButton(final Context context, final AttributeSet attrs) {
-        super(context, attrs);
-    }
-
-    public AddFloatingActionButton(final Context context, final AttributeSet attrs, final int defStyle) {
-        super(context, attrs, defStyle);
-    }
-
-    @Override
-    void init(final Context context, final AttributeSet attributeSet) {
-        final TypedArray attr = context.obtainStyledAttributes(attributeSet, R.styleable.AddFloatingActionButton, 0, 0);
-        mPlusColor = attr.getColor(R.styleable.AddFloatingActionButton_fab_plusIconColor, FloatingActionButton.getColorFromTheme(context, android.R.attr.colorBackground, android.R.color.white));
-        attr.recycle();
-
-        super.init(context, attributeSet);
-    }
-
-    /**
-     * @return the current Color of plus icon.
-     */
-    public int getPlusColor() {
-        return mPlusColor;
-    }
-
-    public void setPlusColor(final int color) {
-        if (mPlusColor != color) {
-            mPlusColor = color;
-            updateBackground();
-        }
-    }
-
-    public void setPlusColorResId(@ColorRes final int plusColor) {
-        setPlusColor(ContextCompat.getColor(getContext(), plusColor));
-    }
-
-    @Override
-    public void setIcon(@DrawableRes final int icon) {
-        throw new UnsupportedOperationException("Use FloatingActionButton if you want to use custom icon");
-    }
-
-    @Override
-    Drawable getIconDrawable() {
-        final float iconSize = getDimension(R.dimen.fab_icon_size);
-        final float iconHalfSize = iconSize / 2f;
-
-        final float plusSize = getDimension(R.dimen.fab_plus_icon_size);
-        final float plusHalfStroke = getDimension(R.dimen.fab_plus_icon_stroke) / 2f;
-        final float plusOffset = (iconSize - plusSize) / 2f;
-
-        final Shape shape = new Shape() {
-            @Override
-            public void draw(final Canvas canvas, final Paint paint) {
-                canvas.drawRect(plusOffset, iconHalfSize - plusHalfStroke, iconSize - plusOffset, iconHalfSize + plusHalfStroke, paint);
-                canvas.drawRect(iconHalfSize - plusHalfStroke, plusOffset, iconHalfSize + plusHalfStroke, iconSize - plusOffset, paint);
-            }
-        };
-
-        final ShapeDrawable drawable = new ShapeDrawable(shape);
-
-        final Paint paint = drawable.getPaint();
-        paint.setColor(mPlusColor);
-        paint.setStyle(Style.FILL);
-        paint.setAntiAlias(true);
-
-        return drawable;
-    }
-}

app/src/main/java/com/wireguard/android/widget/fab/FloatingActionButton.java

@@ -1,446 +0,0 @@
-/*
- * Copyright © 2014 Jerzy Chalupski
- * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
- */
-
-package com.wireguard.android.widget.fab;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.graphics.Canvas;
-import android.graphics.Color;
-import android.graphics.LinearGradient;
-import android.graphics.Paint;
-import android.graphics.Paint.Style;
-import android.graphics.Rect;
-import android.graphics.Shader;
-import android.graphics.Shader.TileMode;
-import android.graphics.drawable.ColorDrawable;
-import android.graphics.drawable.Drawable;
-import android.graphics.drawable.LayerDrawable;
-import android.graphics.drawable.ShapeDrawable;
-import android.graphics.drawable.ShapeDrawable.ShaderFactory;
-import android.graphics.drawable.StateListDrawable;
-import android.graphics.drawable.shapes.OvalShape;
-import android.support.annotation.ColorRes;
-import android.support.annotation.DimenRes;
-import android.support.annotation.DrawableRes;
-import android.support.annotation.IntDef;
-import android.support.annotation.NonNull;
-import android.support.v4.content.ContextCompat;
-import android.support.v7.widget.AppCompatImageButton;
-import android.util.AttributeSet;
-import android.widget.TextView;
-
-import com.wireguard.android.R;
-
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-
-public class FloatingActionButton extends AppCompatImageButton {
-
-    public static final int SIZE_NORMAL = 0;
-    public static final int SIZE_MINI = 1;
-    int mColorNormal;
-    int mColorPressed;
-    int mColorDisabled;
-    String mTitle;
-    boolean mStrokeVisible;
-    @DrawableRes
-    private int mIcon;
-    private Drawable mIconDrawable;
-    private int mSize;
-
-    private float mCircleSize;
-    private float mShadowRadius;
-    private float mShadowOffset;
-    private int mDrawableSize;
-    public FloatingActionButton(final Context context) {
-        this(context, null);
-    }
-
-    public FloatingActionButton(final Context context, final AttributeSet attrs) {
-        super(context, attrs);
-        init(context, attrs);
-    }
-
-    public FloatingActionButton(final Context context, final AttributeSet attrs, final int defStyle) {
-        super(context, attrs, defStyle);
-        init(context, attrs);
-    }
-
-    public static int getColorFromTheme(final Context context, final int themeResource, @ColorRes final int fallback) {
-        final TypedArray a = context.obtainStyledAttributes(new int[]{themeResource});
-        try {
-            return a.getColor(0, ContextCompat.getColor(context, fallback));
-        } finally {
-            a.recycle();
-        }
-    }
-
-    void init(final Context context, final AttributeSet attributeSet) {
-        final TypedArray attr = context.obtainStyledAttributes(attributeSet,
-                R.styleable.FloatingActionButton, 0, 0);
-        mColorNormal = attr.getColor(R.styleable.FloatingActionButton_fab_colorNormal,
-                getColorFromTheme(context, android.R.attr.colorAccent, android.R.color.holo_blue_bright));
-        mColorPressed = attr.getColor(R.styleable.FloatingActionButton_fab_colorPressed,
-                darkenOrLightenColor(mColorNormal)); //TODO(msf): use getColorForState on the accent color from theme instead to get darker states
-        mColorDisabled = attr.getColor(R.styleable.FloatingActionButton_fab_colorDisabled,
-                ContextCompat.getColor(context, android.R.color.darker_gray)); //TODO(msf): load from theme
-        mSize = attr.getInt(R.styleable.FloatingActionButton_fab_size, SIZE_NORMAL);
-        mIcon = attr.getResourceId(R.styleable.FloatingActionButton_fab_icon, 0);
-        mTitle = attr.getString(R.styleable.FloatingActionButton_fab_title);
-        mStrokeVisible = attr.getBoolean(R.styleable.FloatingActionButton_fab_stroke_visible, true);
-        attr.recycle();
-
-        updateCircleSize();
-        mShadowRadius = getDimension(R.dimen.fab_shadow_radius);
-        mShadowOffset = getDimension(R.dimen.fab_shadow_offset);
-        updateDrawableSize();
-
-        updateBackground();
-    }
-
-    private void updateDrawableSize() {
-        mDrawableSize = (int) (mCircleSize + 2 * mShadowRadius);
-    }
-
-    private void updateCircleSize() {
-        mCircleSize = getDimension(mSize == SIZE_NORMAL ? R.dimen.fab_size_normal : R.dimen.fab_size_mini);
-    }
-
-    @FAB_SIZE
-    public int getSize() {
-        return mSize;
-    }
-
-    public void setSize(@FAB_SIZE final int size) {
-        if (size != SIZE_MINI && size != SIZE_NORMAL) {
-            throw new IllegalArgumentException("Use @FAB_SIZE constants only!");
-        }
-
-        if (mSize != size) {
-            mSize = size;
-            updateCircleSize();
-            updateDrawableSize();
-            updateBackground();
-        }
-    }
-
-    public void setIcon(@DrawableRes final int icon) {
-        if (mIcon != icon) {
-            mIcon = icon;
-            mIconDrawable = null;
-            updateBackground();
-        }
-    }
-
-    /**
-     * @return the current Color for normal state.
-     */
-    public int getColorNormal() {
-        return mColorNormal;
-    }
-
-    public void setColorNormal(final int color) {
-        if (mColorNormal != color) {
-            mColorNormal = color;
-            updateBackground();
-        }
-    }
-
-    public void setColorNormalResId(@ColorRes final int colorNormal) {
-        setColorNormal(ContextCompat.getColor(getContext(), colorNormal));
-    }
-
-    /**
-     * @return the current color for pressed state.
-     */
-    public int getColorPressed() {
-        return mColorPressed;
-    }
-
-    public void setColorPressed(final int color) {
-        if (mColorPressed != color) {
-            mColorPressed = color;
-            updateBackground();
-        }
-    }
-
-    public void setColorPressedResId(@ColorRes final int colorPressed) {
-        setColorPressed(ContextCompat.getColor(getContext(), colorPressed));
-    }
-
-    /**
-     * @return the current color for disabled state.
-     */
-    public int getColorDisabled() {
-        return mColorDisabled;
-    }
-
-    public void setColorDisabled(final int color) {
-        if (mColorDisabled != color) {
-            mColorDisabled = color;
-            updateBackground();
-        }
-    }
-
-    public void setColorDisabledResId(@ColorRes final int colorDisabled) {
-        setColorDisabled(ContextCompat.getColor(getContext(), colorDisabled));
-    }
-
-    public boolean isStrokeVisible() {
-        return mStrokeVisible;
-    }
-
-    public void setStrokeVisible(final boolean visible) {
-        if (mStrokeVisible != visible) {
-            mStrokeVisible = visible;
-            updateBackground();
-        }
-    }
-
-    float getDimension(@DimenRes final int id) {
-        return getResources().getDimension(id);
-    }
-
-    TextView getLabelView() {
-        return (TextView) getTag(R.id.fab_label);
-    }
-
-    public String getTitle() {
-        return mTitle;
-    }
-
-    public void setTitle(final String title) {
-        mTitle = title;
-        final TextView label = getLabelView();
-        if (label != null) {
-            label.setText(title);
-        }
-    }
-
-    @Override
-    protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
-        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-        setMeasuredDimension(mDrawableSize, mDrawableSize);
-    }
-
-    void updateBackground() {
-        final float strokeWidth = getDimension(R.dimen.fab_stroke_width);
-        final float halfStrokeWidth = strokeWidth / 2f;
-
-        final LayerDrawable layerDrawable = new LayerDrawable(
-                new Drawable[]{
-                        //TODO(msf); replace these pngs with programatic elevation
-                        getResources().getDrawable(mSize == SIZE_NORMAL ? R.drawable.fab_bg_normal : R.drawable.fab_bg_mini, null),
-                        createFillDrawable(strokeWidth),
-                        createOuterStrokeDrawable(strokeWidth),
-                        getIconDrawable()
-                });
-
-        final int iconOffset = (int) (mCircleSize - getDimension(R.dimen.fab_icon_size)) / 2;
-
-        final int circleInsetHorizontal = (int) (mShadowRadius);
-        final int circleInsetTop = (int) (mShadowRadius - mShadowOffset);
-        final int circleInsetBottom = (int) (mShadowRadius + mShadowOffset);
-
-        layerDrawable.setLayerInset(1,
-                circleInsetHorizontal,
-                circleInsetTop,
-                circleInsetHorizontal,
-                circleInsetBottom);
-
-        layerDrawable.setLayerInset(2,
-                (int) (circleInsetHorizontal - halfStrokeWidth),
-                (int) (circleInsetTop - halfStrokeWidth),
-                (int) (circleInsetHorizontal - halfStrokeWidth),
-                (int) (circleInsetBottom - halfStrokeWidth));
-
-        layerDrawable.setLayerInset(3,
-                circleInsetHorizontal + iconOffset,
-                circleInsetTop + iconOffset,
-                circleInsetHorizontal + iconOffset,
-                circleInsetBottom + iconOffset);
-
-        setBackground(layerDrawable);
-    }
-
-    Drawable getIconDrawable() {
-        if (mIconDrawable != null) {
-            return mIconDrawable;
-        } else if (mIcon != 0) {
-            return ContextCompat.getDrawable(getContext(), mIcon);
-        } else {
-            return new ColorDrawable(Color.TRANSPARENT);
-        }
-    }
-
-    public void setIconDrawable(@NonNull final Drawable iconDrawable) {
-        if (mIconDrawable != iconDrawable) {
-            mIcon = 0;
-            mIconDrawable = iconDrawable;
-            updateBackground();
-        }
-    }
-
-    private StateListDrawable createFillDrawable(final float strokeWidth) {
-        final StateListDrawable drawable = new StateListDrawable();
-        drawable.addState(new int[]{-android.R.attr.state_enabled}, createCircleDrawable(mColorDisabled, strokeWidth));
-        drawable.addState(new int[]{android.R.attr.state_pressed}, createCircleDrawable(mColorPressed, strokeWidth));
-        drawable.addState(new int[]{}, createCircleDrawable(mColorNormal, strokeWidth));
-        return drawable;
-    }
-
-    private Drawable createCircleDrawable(final int color, final float strokeWidth) {
-        final int alpha = Color.alpha(color);
-        final int opaqueColor = opaque(color);
-
-        final ShapeDrawable fillDrawable = new ShapeDrawable(new OvalShape());
-
-        final Paint paint = fillDrawable.getPaint();
-        paint.setAntiAlias(true);
-        paint.setColor(opaqueColor);
-
-        final Drawable[] layers = {
-                fillDrawable,
-                createInnerStrokesDrawable(opaqueColor, strokeWidth)
-        };
-
-        final LayerDrawable drawable = alpha == 255 || !mStrokeVisible
-                ? new LayerDrawable(layers)
-                : new TranslucentLayerDrawable(alpha, layers);
-
-        final int halfStrokeWidth = (int) (strokeWidth / 2f);
-        drawable.setLayerInset(1, halfStrokeWidth, halfStrokeWidth, halfStrokeWidth, halfStrokeWidth);
-
-        return drawable;
-    }
-
-    private static Drawable createOuterStrokeDrawable(final float strokeWidth) {
-        final ShapeDrawable shapeDrawable = new ShapeDrawable(new OvalShape());
-
-        final Paint paint = shapeDrawable.getPaint();
-        paint.setAntiAlias(true);
-        paint.setStrokeWidth(strokeWidth);
-        paint.setStyle(Style.STROKE);
-        paint.setColor(Color.BLACK);
-        paint.setAlpha(opacityToAlpha(0.02f));
-
-        return shapeDrawable;
-    }
-
-    private static int opacityToAlpha(final float opacity) {
-        return (int) (255f * opacity);
-    }
-
-    private static int darkenColor(final int argb) {
-        return adjustColorBrightness(argb, 0.9f);
-    }
-
-    private static int lightenColor(final int argb) {
-        return adjustColorBrightness(argb, 1.1f);
-    }
-
-    public static int darkenOrLightenColor(final int argb) {
-        final float[] hsv = new float[3];
-        Color.colorToHSV(argb, hsv);
-        final float factor;
-        if (hsv[2] < 0.2)
-            factor = 1.2f;
-        else
-            factor = 0.8f;
-
-        hsv[2] = Math.min(hsv[2] * factor, 1f);
-        return Color.HSVToColor(Color.alpha(argb), hsv);
-    }
-
-    private static int adjustColorBrightness(final int argb, final float factor) {
-        final float[] hsv = new float[3];
-        Color.colorToHSV(argb, hsv);
-
-        hsv[2] = Math.min(hsv[2] * factor, 1f);
-
-        return Color.HSVToColor(Color.alpha(argb), hsv);
-    }
-
-    private static int halfTransparent(final int argb) {
-        return Color.argb(
-                Color.alpha(argb) / 2,
-                Color.red(argb),
-                Color.green(argb),
-                Color.blue(argb)
-        );
-    }
-
-    private static int opaque(final int argb) {
-        return Color.rgb(
-                Color.red(argb),
-                Color.green(argb),
-                Color.blue(argb)
-        );
-    }
-
-    private Drawable createInnerStrokesDrawable(final int color, final float strokeWidth) {
-        if (!mStrokeVisible) {
-            return new ColorDrawable(Color.TRANSPARENT);
-        }
-
-        final ShapeDrawable shapeDrawable = new ShapeDrawable(new OvalShape());
-
-        final int bottomStrokeColor = darkenColor(color);
-        final int bottomStrokeColorHalfTransparent = halfTransparent(bottomStrokeColor);
-        final int topStrokeColor = lightenColor(color);
-        final int topStrokeColorHalfTransparent = halfTransparent(topStrokeColor);
-
-        final Paint paint = shapeDrawable.getPaint();
-        paint.setAntiAlias(true);
-        paint.setStrokeWidth(strokeWidth);
-        paint.setStyle(Style.STROKE);
-        shapeDrawable.setShaderFactory(new ShaderFactory() {
-            @Override
-            public Shader resize(int width, int height) {
-                return new LinearGradient(width / 2, 0, width / 2, height,
-                        new int[]{topStrokeColor, topStrokeColorHalfTransparent, color, bottomStrokeColorHalfTransparent, bottomStrokeColor},
-                        new float[]{0f, 0.2f, 0.5f, 0.8f, 1f},
-                        TileMode.CLAMP
-                );
-            }
-        });
-
-        return shapeDrawable;
-    }
-
-    @Override
-    public void setVisibility(final int visibility) {
-        final TextView label = getLabelView();
-        if (label != null) {
-            label.setVisibility(visibility);
-        }
-
-        super.setVisibility(visibility);
-    }
-
-    @Retention(RetentionPolicy.SOURCE)
-    @IntDef({SIZE_NORMAL, SIZE_MINI})
-    public @interface FAB_SIZE {
-    }
-
-    private static final class TranslucentLayerDrawable extends LayerDrawable {
-        private final int mAlpha;
-
-        private TranslucentLayerDrawable(final int alpha, final Drawable... layers) {
-            super(layers);
-            mAlpha = alpha;
-        }
-
-        @Override
-        public void draw(final Canvas canvas) {
-            final Rect bounds = getBounds();
-            canvas.saveLayerAlpha(bounds.left, bounds.top, bounds.right, bounds.bottom, mAlpha);
-            super.draw(canvas);
-            canvas.restore();
-        }
-    }
-}

app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2014 Jerzy Chalupski
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.widget.fab;
@@ -20,7 +20,9 @@ import android.graphics.drawable.LayerDrawable;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.support.annotation.Keep;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.design.widget.FloatingActionButton;
+import android.support.v4.content.res.ResourcesCompat;
 import android.support.v7.widget.AppCompatTextView;
 import android.util.AttributeSet;
 import android.view.ContextThemeWrapper;
@@ -33,7 +35,6 @@ import android.widget.TextView;
 
 import com.wireguard.android.R;
 
-@SuppressWarnings("ReturnOfInnerClass")
 public class FloatingActionsMenu extends ViewGroup {
     public static final int EXPAND_UP = 0;
     public static final int EXPAND_DOWN = 1;
@@ -49,11 +50,6 @@ public class FloatingActionsMenu extends ViewGroup {
     private static final TimeInterpolator EXPAND_INTERPOLATOR = new OvershootInterpolator();
     private static final TimeInterpolator COLLAPSE_INTERPOLATOR = new DecelerateInterpolator(3f);
     private static final TimeInterpolator ALPHA_EXPAND_INTERPOLATOR = new DecelerateInterpolator();
-    private int mAddButtonPlusColor;
-    private int mAddButtonColorNormal;
-    private int mAddButtonColorPressed;
-    private int mAddButtonSize;
-    private boolean mAddButtonStrokeVisible;
     private int mExpandDirection;
     private int mButtonSpacing;
     private int mLabelsMargin;
@@ -61,33 +57,33 @@ public class FloatingActionsMenu extends ViewGroup {
     private boolean mExpanded;
     private final AnimatorSet mExpandAnimation = new AnimatorSet().setDuration(ANIMATION_DURATION);
     private final AnimatorSet mCollapseAnimation = new AnimatorSet().setDuration(ANIMATION_DURATION);
-    private AddFloatingActionButton mAddButton;
-    private RotatingDrawable mRotatingDrawable;
+    @Nullable private FloatingActionButton mAddButton;
+    @Nullable private RotatingDrawable mRotatingDrawable;
     private int mMaxButtonWidth;
     private int mMaxButtonHeight;
     private int mLabelsStyle;
     private int mLabelsPosition;
     private int mButtonsCount;
-    private TouchDelegateGroup mTouchDelegateGroup;
-    private OnFloatingActionsMenuUpdateListener mListener;
+    @Nullable private TouchDelegateGroup mTouchDelegateGroup;
+    @Nullable private OnFloatingActionsMenuUpdateListener mListener;
     private final Rect touchArea = new Rect(0, 0, 0, 0);
 
     public FloatingActionsMenu(final Context context) {
         this(context, null);
     }
 
-    public FloatingActionsMenu(final Context context, final AttributeSet attrs) {
+    public FloatingActionsMenu(final Context context, @Nullable final AttributeSet attrs) {
         super(context, attrs);
         init(context, attrs);
     }
 
-    public FloatingActionsMenu(final Context context, final AttributeSet attrs, final int defStyle) {
+    public FloatingActionsMenu(final Context context, @Nullable final AttributeSet attrs, final int defStyle) {
         super(context, attrs, defStyle);
         init(context, attrs);
     }
 
-    private void init(final Context context, final AttributeSet attributeSet) {
-        mButtonSpacing = (int) (getResources().getDimension(R.dimen.fab_actions_spacing) - getResources().getDimension(R.dimen.fab_shadow_radius) - getResources().getDimension(R.dimen.fab_shadow_offset));
+    private void init(final Context context, @Nullable final AttributeSet attributeSet) {
+        mButtonSpacing = (int) (getResources().getDimension(R.dimen.fab_actions_spacing));
         mLabelsMargin = getResources().getDimensionPixelSize(R.dimen.fab_labels_margin);
         mLabelsVerticalOffset = getResources().getDimensionPixelSize(R.dimen.fab_shadow_offset);
 
@@ -95,14 +91,6 @@ public class FloatingActionsMenu extends ViewGroup {
         setTouchDelegate(mTouchDelegateGroup);
 
         final TypedArray attr = context.obtainStyledAttributes(attributeSet, R.styleable.FloatingActionsMenu, 0, 0);
-        mAddButtonPlusColor = attr.getColor(R.styleable.FloatingActionsMenu_fab_addButtonPlusIconColor,
-                FloatingActionButton.getColorFromTheme(context, android.R.attr.colorBackground, android.R.color.white));
-        mAddButtonColorNormal = attr.getColor(R.styleable.FloatingActionsMenu_fab_addButtonColorNormal,
-                FloatingActionButton.getColorFromTheme(context, android.R.attr.colorAccent, android.R.color.holo_blue_bright));
-        mAddButtonColorPressed = attr.getColor(R.styleable.FloatingActionsMenu_fab_addButtonColorPressed,
-                FloatingActionButton.darkenOrLightenColor(mAddButtonColorNormal)); //TODO(msf): use getColorForState on the accent color from theme instead to get darker states
-        mAddButtonSize = attr.getInt(R.styleable.FloatingActionsMenu_fab_addButtonSize, FloatingActionButton.SIZE_NORMAL);
-        mAddButtonStrokeVisible = attr.getBoolean(R.styleable.FloatingActionsMenu_fab_addButtonStrokeVisible, true);
         mExpandDirection = attr.getInt(R.styleable.FloatingActionsMenu_fab_expandDirection, EXPAND_UP);
         mLabelsStyle = attr.getResourceId(R.styleable.FloatingActionsMenu_fab_labelStyle, 0);
         mLabelsPosition = attr.getInt(R.styleable.FloatingActionsMenu_fab_labelsPosition, LABELS_ON_LEFT_SIDE);
@@ -124,45 +112,30 @@ public class FloatingActionsMenu extends ViewGroup {
     }
 
     private void createAddButton(final Context context) {
-        mAddButton = new AddFloatingActionButton(context) {
-            @Override
-            void updateBackground() {
-                mPlusColor = mAddButtonPlusColor;
-                mColorNormal = mAddButtonColorNormal;
-                mColorPressed = mAddButtonColorPressed;
-                mStrokeVisible = mAddButtonStrokeVisible;
-                super.updateBackground();
-            }
+        final RotatingDrawable rotatingDrawable = new RotatingDrawable(ResourcesCompat.getDrawable(context.getResources(), R.drawable.ic_action_add_inverse, context.getTheme()));
+        mRotatingDrawable = rotatingDrawable;
 
-            @Override
-            Drawable getIconDrawable() {
-                final RotatingDrawable rotatingDrawable = new RotatingDrawable(super.getIconDrawable());
-                mRotatingDrawable = rotatingDrawable;
+        final TimeInterpolator interpolator = new OvershootInterpolator();
 
-                final TimeInterpolator interpolator = new OvershootInterpolator();
+        final ObjectAnimator collapseAnimator = ObjectAnimator.ofFloat(rotatingDrawable, "rotation", EXPANDED_PLUS_ROTATION, COLLAPSED_PLUS_ROTATION);
+        final ObjectAnimator expandAnimator = ObjectAnimator.ofFloat(rotatingDrawable, "rotation", COLLAPSED_PLUS_ROTATION, EXPANDED_PLUS_ROTATION);
 
-                final ObjectAnimator collapseAnimator = ObjectAnimator.ofFloat(rotatingDrawable, "rotation", EXPANDED_PLUS_ROTATION, COLLAPSED_PLUS_ROTATION);
-                final ObjectAnimator expandAnimator = ObjectAnimator.ofFloat(rotatingDrawable, "rotation", COLLAPSED_PLUS_ROTATION, EXPANDED_PLUS_ROTATION);
+        collapseAnimator.setInterpolator(interpolator);
+        expandAnimator.setInterpolator(interpolator);
 
-                collapseAnimator.setInterpolator(interpolator);
-                expandAnimator.setInterpolator(interpolator);
-
-                mExpandAnimation.play(expandAnimator);
-                mCollapseAnimation.play(collapseAnimator);
-
-                return rotatingDrawable;
-            }
-        };
+        mExpandAnimation.play(expandAnimator);
+        mCollapseAnimation.play(collapseAnimator);
 
+        mAddButton = new FloatingActionButton(context);
+        mAddButton.setImageDrawable(rotatingDrawable);
         mAddButton.setId(R.id.fab_expand_menu_button);
-        mAddButton.setSize(mAddButtonSize);
         mAddButton.setOnClickListener(v -> toggle());
 
         addView(mAddButton, super.generateDefaultLayoutParams());
         mButtonsCount++;
     }
 
-    public void addButton(final FloatingActionButton button) {
+    public void addButton(final LabeledFloatingActionButton button) {
         addView(button, mButtonsCount - 1);
         mButtonsCount++;
 
@@ -171,7 +144,7 @@ public class FloatingActionsMenu extends ViewGroup {
         }
     }
 
-    public void removeButton(final FloatingActionButton button) {
+    public void removeButton(final LabeledFloatingActionButton button) {
         removeView(button.getLabelView());
         removeView(button);
         button.setTag(R.id.fab_label, null);
@@ -256,9 +229,9 @@ public class FloatingActionsMenu extends ViewGroup {
 
                 final int addButtonY = expandUp ? b - t - mAddButton.getMeasuredHeight() : 0;
                 // Ensure mAddButton is centered on the line where the buttons should be
-                final int buttonsHorizontalCenter = mLabelsPosition == LABELS_ON_LEFT_SIDE
+                final int buttonsHorizontalCenter = (mLabelsPosition == LABELS_ON_LEFT_SIDE
                         ? r - l - mMaxButtonWidth / 2
-                        : mMaxButtonWidth / 2;
+                        : mMaxButtonWidth / 2);
                 final int addButtonLeft = buttonsHorizontalCenter - mAddButton.getMeasuredWidth() / 2;
                 mAddButton.layout(addButtonLeft, addButtonY, addButtonLeft + mAddButton.getMeasuredWidth(), addButtonY + mAddButton.getMeasuredHeight());
 
@@ -313,7 +286,7 @@ public class FloatingActionsMenu extends ViewGroup {
                                 childY - mButtonSpacing / 2,
                                 Math.max(childX + child.getMeasuredWidth(), labelRight),
                                 childY + child.getMeasuredHeight() + mButtonSpacing / 2);
-                        mTouchDelegateGroup.addTouchDelegate(new TouchDelegate(touchArea, child));
+                        mTouchDelegateGroup.addTouchDelegate(new TouchDelegate(new Rect(touchArea), child));
 
                         label.setTranslationY(mExpanded ? expandedTranslation : collapsedTranslation);
                         label.setAlpha(mExpanded ? 1f : 0f);
@@ -404,17 +377,17 @@ public class FloatingActionsMenu extends ViewGroup {
 
         for (int i = 0; i < mButtonsCount; i++) {
             final FloatingActionButton button = (FloatingActionButton) getChildAt(i);
-            final String title = button.getTitle();
 
-            if (button == mAddButton || title == null ||
-                    button.getTag(R.id.fab_label) != null) continue;
+            if (button instanceof LabeledFloatingActionButton) {
+                final String title = ((LabeledFloatingActionButton) button).getTitle();
 
-            final AppCompatTextView label = new AppCompatTextView(context);
-            label.setTextAppearance(context, mLabelsStyle);
-            label.setText(button.getTitle());
-            addView(label);
+                final AppCompatTextView label = new AppCompatTextView(context);
+                label.setTextAppearance(context, mLabelsStyle);
+                label.setText(title);
+                addView(label);
 
-            button.setTag(R.id.fab_label, label);
+                button.setTag(R.id.fab_label, label);
+            }
         }
     }
 
@@ -557,7 +530,7 @@ public class FloatingActionsMenu extends ViewGroup {
         }
 
         @Override
-        public void writeToParcel(@NonNull final Parcel out, final int flags) {
+        public void writeToParcel(final Parcel out, final int flags) {
             super.writeToParcel(out, flags);
             out.writeInt(mExpanded ? 1 : 0);
         }

app/src/main/java/com/wireguard/android/widget/fab/LabeledFloatingActionButton.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2014 Jerzy Chalupski
+ * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.android.widget.fab;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.support.annotation.Nullable;
+import android.support.design.widget.FloatingActionButton;
+import android.util.AttributeSet;
+import android.widget.TextView;
+
+import com.wireguard.android.R;
+
+public class LabeledFloatingActionButton extends FloatingActionButton {
+
+    @Nullable private final String title;
+
+    public LabeledFloatingActionButton(final Context context) {
+        this(context, null);
+    }
+
+    public LabeledFloatingActionButton(final Context context, @Nullable final AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public LabeledFloatingActionButton(final Context context, @Nullable final AttributeSet attrs, final int defStyle) {
+        super(context, attrs, defStyle);
+
+        final TypedArray attr = context.obtainStyledAttributes(attrs, R.styleable.LabeledFloatingActionButton, 0, 0);
+        title = attr.getString(R.styleable.LabeledFloatingActionButton_fab_title);
+        attr.recycle();
+    }
+
+    @Nullable
+    TextView getLabelView() {
+        return (TextView) getTag(R.id.fab_label);
+    }
+
+    @Nullable
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public void setVisibility(final int visibility) {
+        final TextView label = getLabelView();
+        if (label != null) {
+            label.setVisibility(visibility);
+        }
+
+        super.setVisibility(visibility);
+    }
+
+}

app/src/main/java/com/wireguard/android/widget/fab/TouchDelegateGroup.java

@@ -1,13 +1,13 @@
 /*
  * Copyright © 2014 Jerzy Chalupski
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.widget.fab;
 
 import android.graphics.Rect;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.view.MotionEvent;
 import android.view.TouchDelegate;
 import android.view.View;
@@ -18,14 +18,14 @@ import java.util.Collection;
 public class TouchDelegateGroup extends TouchDelegate {
     private static final Rect USELESS_HACKY_RECT = new Rect();
     private final Collection<TouchDelegate> mTouchDelegates = new ArrayList<>();
-    private TouchDelegate mCurrentTouchDelegate;
+    @Nullable private TouchDelegate mCurrentTouchDelegate;
     private boolean mEnabled;
 
     public TouchDelegateGroup(final View uselessHackyView) {
         super(USELESS_HACKY_RECT, uselessHackyView);
     }
 
-    public void addTouchDelegate(@NonNull final TouchDelegate touchDelegate) {
+    public void addTouchDelegate(final TouchDelegate touchDelegate) {
         mTouchDelegates.add(touchDelegate);
     }
 
@@ -42,14 +42,15 @@ public class TouchDelegateGroup extends TouchDelegate {
     }
 
     @Override
-    public boolean onTouchEvent(@NonNull final MotionEvent event) {
-        if (!mEnabled) return false;
+    public boolean onTouchEvent(final MotionEvent event) {
+        if (!mEnabled)
+            return false;
 
         TouchDelegate delegate = null;
 
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
-		for (final TouchDelegate touchDelegate : mTouchDelegates) {
+                for (final TouchDelegate touchDelegate : mTouchDelegates) {
                     if (touchDelegate.onTouchEvent(event)) {
                         mCurrentTouchDelegate = touchDelegate;
                         return true;

app/src/main/java/com/wireguard/config/Attribute.java

@@ -1,11 +1,12 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.config;
 
+import android.support.annotation.Nullable;
 import android.text.TextUtils;
 
 import java.util.HashMap;
@@ -18,10 +19,11 @@ import java.util.regex.Pattern;
  * The set of valid attributes for an interface or peer in a WireGuard configuration file.
  */
 
-enum Attribute {
+public enum Attribute {
     ADDRESS("Address"),
     ALLOWED_IPS("AllowedIPs"),
     DNS("DNS"),
+    EXCLUDED_APPLICATIONS("ExcludedApplications"),
     ENDPOINT("Endpoint"),
     LISTEN_PORT("ListenPort"),
     MTU("MTU"),
@@ -58,13 +60,13 @@ enum Attribute {
         return KEY_MAP.get(SEPARATOR_PATTERN.split(line)[0].toLowerCase());
     }
 
-    public static String[] stringToList(final String string) {
-        if (string == null)
+    public static String[] stringToList(@Nullable final String string) {
+        if (TextUtils.isEmpty(string))
             return EMPTY_LIST;
         return LIST_SEPARATOR_PATTERN.split(string.trim());
     }
 
-    public String composeWith(final Object value) {
+    public String composeWith(@Nullable final Object value) {
         return String.format("%s = %s%n", token, value);
     }
 
@@ -76,11 +78,13 @@ enum Attribute {
         return String.format("%s = %s%n", token, iterableToString(value));
     }
 
+    @Nullable
     public String parse(final CharSequence line) {
         final Matcher matcher = pattern.matcher(line);
         return matcher.matches() ? matcher.group(1) : null;
     }
 
+    @Nullable
     public String[] parseList(final CharSequence line) {
         final Matcher matcher = pattern.matcher(line);
         return matcher.matches() ? stringToList(matcher.group(1)) : null;

app/src/main/java/com/wireguard/config/Config.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.config;
@@ -12,6 +12,7 @@ import android.databinding.ObservableArrayList;
 import android.databinding.ObservableList;
 import android.os.Parcel;
 import android.os.Parcelable;
+import android.support.annotation.Nullable;
 
 import com.android.databinding.library.baseAdapters.BR;
 
@@ -96,13 +97,19 @@ public class Config {
                 return new Observable[size];
             }
         };
-        private String name;
-        private Interface.Observable observableInterface;
-        private ObservableList<Peer.Observable> observablePeers;
+        @Nullable private String name;
+        private final Interface.Observable observableInterface;
+        private final ObservableList<Peer.Observable> observablePeers;
 
-        public Observable(final Config parent, final String name) {
+        public Observable(@Nullable final Config parent, @Nullable final String name) {
             this.name = name;
-            loadData(parent);
+
+            observableInterface = new Interface.Observable(parent == null ? null : parent.interfaceSection);
+            observablePeers = new ObservableArrayList<>();
+            if (parent != null) {
+                for (final Peer peer : parent.getPeers())
+                    observablePeers.add(new Peer.Observable(peer));
+            }
         }
 
         private Observable(final Parcel in) {
@@ -144,15 +151,6 @@ public class Config {
             return observablePeers;
         }
 
-        protected void loadData(final Config parent) {
-            observableInterface = new Interface.Observable(parent == null ? null : parent.interfaceSection);
-            observablePeers = new ObservableArrayList<>();
-            if (parent != null) {
-                for (final Peer peer : parent.getPeers())
-                    observablePeers.add(new Peer.Observable(peer));
-            }
-        }
-
         public void setName(final String name) {
             this.name = name;
             notifyPropertyChanged(BR.name);

app/src/main/java/com/wireguard/config/InetAddresses.java

@@ -1,12 +1,11 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.config;
 
-import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
 import java.lang.reflect.InvocationTargetException;
@@ -29,14 +28,13 @@ public final class InetAddresses {
         // Prevent instantiation.
     }
 
-    @NonNull
     public static InetAddress parse(@Nullable final String address) {
         if (address == null || address.isEmpty())
             throw new IllegalArgumentException("Empty address");
         try {
             return (InetAddress) PARSER_METHOD.invoke(null, address);
         } catch (final IllegalAccessException | InvocationTargetException e) {
-            throw new RuntimeException(e);
+            throw new RuntimeException(e.getCause() == null ? e : e.getCause());
         }
     }
 }

app/src/main/java/com/wireguard/config/InetNetwork.java

@@ -1,13 +1,11 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.config;
 
-import android.support.annotation.NonNull;
-
 import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.util.Objects;
@@ -16,7 +14,7 @@ public class InetNetwork {
     private final InetAddress address;
     private final int mask;
 
-    public InetNetwork(@NonNull final String input) {
+    public InetNetwork(final String input) {
         final int slash = input.lastIndexOf('/');
         final int rawMask;
         final String rawAddress;
@@ -40,7 +38,6 @@ public class InetNetwork {
         return Objects.equals(address, other.address) && mask == other.mask;
     }
 
-    @NonNull
     public InetAddress getAddress() {
         return address;
     }

app/src/main/java/com/wireguard/config/Interface.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.config;
@@ -10,12 +10,14 @@ import android.databinding.BaseObservable;
 import android.databinding.Bindable;
 import android.os.Parcel;
 import android.os.Parcelable;
+import android.support.annotation.Nullable;
 
 import com.wireguard.android.BR;
 import com.wireguard.crypto.Keypair;
 
 import java.net.InetAddress;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 /**
@@ -25,16 +27,18 @@ import java.util.List;
 public class Interface {
     private final List<InetNetwork> addressList;
     private final List<InetAddress> dnsList;
-    private Keypair keypair;
+    private final List<String> excludedApplications;
+    @Nullable private Keypair keypair;
     private int listenPort;
     private int mtu;
 
     public Interface() {
         addressList = new ArrayList<>();
         dnsList = new ArrayList<>();
+        excludedApplications = new ArrayList<>();
     }
 
-    private void addAddresses(final String[] addresses) {
+    private void addAddresses(@Nullable final String[] addresses) {
         if (addresses != null && addresses.length > 0) {
             for (final String addr : addresses) {
                 if (addr.isEmpty())
@@ -44,7 +48,7 @@ public class Interface {
         }
     }
 
-    private void addDnses(final String[] dnses) {
+    private void addDnses(@Nullable final String[] dnses) {
         if (dnses != null && dnses.length > 0) {
             for (final String dns : dnses) {
                 dnsList.add(InetAddresses.parse(dns));
@@ -52,6 +56,13 @@ public class Interface {
         }
     }
 
+    private void addExcludedApplications(@Nullable final String[] applications) {
+        if (applications != null && applications.length > 0) {
+            excludedApplications.addAll(Arrays.asList(applications));
+        }
+    }
+
+    @Nullable
     private String getAddressString() {
         if (addressList.isEmpty())
             return null;
@@ -62,6 +73,7 @@ public class Interface {
         return addressList.toArray(new InetNetwork[addressList.size()]);
     }
 
+    @Nullable
     private String getDnsString() {
         if (dnsList.isEmpty())
             return null;
@@ -79,10 +91,22 @@ public class Interface {
         return dnsList.toArray(new InetAddress[dnsList.size()]);
     }
 
+    @Nullable
+    private String getExcludedApplicationsString() {
+        if (excludedApplications.isEmpty())
+            return null;
+        return Attribute.iterableToString(excludedApplications);
+    }
+
+    public String[] getExcludedApplications() {
+        return excludedApplications.toArray(new String[excludedApplications.size()]);
+    }
+
     public int getListenPort() {
         return listenPort;
     }
 
+    @Nullable
     private String getListenPortString() {
         if (listenPort == 0)
             return null;
@@ -93,18 +117,21 @@ public class Interface {
         return mtu;
     }
 
+    @Nullable
     private String getMtuString() {
         if (mtu == 0)
             return null;
         return Integer.toString(mtu);
     }
 
+    @Nullable
     public String getPrivateKey() {
         if (keypair == null)
             return null;
         return keypair.getPrivateKey();
     }
 
+    @Nullable
     public String getPublicKey() {
         if (keypair == null)
             return null;
@@ -120,6 +147,9 @@ public class Interface {
             case DNS:
                 addDnses(key.parseList(line));
                 break;
+            case EXCLUDED_APPLICATIONS:
+                addExcludedApplications(key.parseList(line));
+                break;
             case LISTEN_PORT:
                 setListenPortString(key.parse(line));
                 break;
@@ -134,21 +164,26 @@ public class Interface {
         }
     }
 
-    private void setAddressString(final String addressString) {
+    private void setAddressString(@Nullable final String addressString) {
         addressList.clear();
         addAddresses(Attribute.stringToList(addressString));
     }
 
-    private void setDnsString(final String dnsString) {
+    private void setDnsString(@Nullable final String dnsString) {
         dnsList.clear();
         addDnses(Attribute.stringToList(dnsString));
     }
 
+    private void setExcludedApplicationsString(@Nullable final String applicationsString) {
+        excludedApplications.clear();
+        addExcludedApplications(Attribute.stringToList(applicationsString));
+    }
+
     private void setListenPort(final int listenPort) {
         this.listenPort = listenPort;
     }
 
-    private void setListenPortString(final String port) {
+    private void setListenPortString(@Nullable final String port) {
         if (port != null && !port.isEmpty())
             setListenPort(Integer.parseInt(port, 10));
         else
@@ -159,14 +194,14 @@ public class Interface {
         this.mtu = mtu;
     }
 
-    private void setMtuString(final String mtu) {
+    private void setMtuString(@Nullable final String mtu) {
         if (mtu != null && !mtu.isEmpty())
             setMtu(Integer.parseInt(mtu, 10));
         else
             setMtu(0);
     }
 
-    private void setPrivateKey(String privateKey) {
+    private void setPrivateKey(@Nullable String privateKey) {
         if (privateKey != null && privateKey.isEmpty())
             privateKey = null;
         keypair = privateKey == null ? null : new Keypair(privateKey);
@@ -179,6 +214,8 @@ public class Interface {
             sb.append(Attribute.ADDRESS.composeWith(addressList));
         if (!dnsList.isEmpty())
             sb.append(Attribute.DNS.composeWith(getDnsStrings()));
+        if (!excludedApplications.isEmpty())
+            sb.append(Attribute.EXCLUDED_APPLICATIONS.composeWith(excludedApplications));
         if (listenPort != 0)
             sb.append(Attribute.LISTEN_PORT.composeWith(listenPort));
         if (mtu != 0)
@@ -200,14 +237,15 @@ public class Interface {
                 return new Observable[size];
             }
         };
-        private String addresses;
-        private String dnses;
-        private String listenPort;
-        private String mtu;
-        private String privateKey;
-        private String publicKey;
+        @Nullable private String addresses;
+        @Nullable private String dnses;
+        @Nullable private String excludedApplications;
+        @Nullable private String listenPort;
+        @Nullable private String mtu;
+        @Nullable private String privateKey;
+        @Nullable private String publicKey;
 
-        public Observable(final Interface parent) {
+        public Observable(@Nullable final Interface parent) {
             if (parent != null)
                 loadData(parent);
         }
@@ -219,11 +257,13 @@ public class Interface {
             privateKey = in.readString();
             listenPort = in.readString();
             mtu = in.readString();
+            excludedApplications = in.readString();
         }
 
         public void commitData(final Interface parent) {
             parent.setAddressString(addresses);
             parent.setDnsString(dnses);
+            parent.setExcludedApplicationsString(excludedApplications);
             parent.setPrivateKey(privateKey);
             parent.setListenPortString(listenPort);
             parent.setMtuString(mtu);
@@ -244,39 +284,57 @@ public class Interface {
             notifyPropertyChanged(BR.publicKey);
         }
 
+        @Nullable
         @Bindable
         public String getAddresses() {
             return addresses;
         }
 
+        @Nullable
         @Bindable
         public String getDnses() {
             return dnses;
         }
 
+        @Nullable
+        @Bindable
+        public String getExcludedApplications() {
+            return excludedApplications;
+        }
+
+        @Bindable
+        public int getExcludedApplicationsCount() {
+            return Attribute.stringToList(excludedApplications).length;
+        }
+
+        @Nullable
         @Bindable
         public String getListenPort() {
             return listenPort;
         }
 
+        @Nullable
         @Bindable
         public String getMtu() {
             return mtu;
         }
 
+        @Nullable
         @Bindable
         public String getPrivateKey() {
             return privateKey;
         }
 
+        @Nullable
         @Bindable
         public String getPublicKey() {
             return publicKey;
         }
 
-        protected void loadData(final Interface parent) {
+        private void loadData(final Interface parent) {
             addresses = parent.getAddressString();
             dnses = parent.getDnsString();
+            excludedApplications = parent.getExcludedApplicationsString();
             publicKey = parent.getPublicKey();
             privateKey = parent.getPrivateKey();
             listenPort = parent.getListenPortString();
@@ -293,6 +351,12 @@ public class Interface {
             notifyPropertyChanged(BR.dnses);
         }
 
+        public void setExcludedApplications(final String excludedApplications) {
+            this.excludedApplications = excludedApplications;
+            notifyPropertyChanged(BR.excludedApplications);
+            notifyPropertyChanged(BR.excludedApplicationsCount);
+        }
+
         public void setListenPort(final String listenPort) {
             this.listenPort = listenPort;
             notifyPropertyChanged(BR.listenPort);
@@ -324,6 +388,7 @@ public class Interface {
             dest.writeString(privateKey);
             dest.writeString(listenPort);
             dest.writeString(mtu);
+            dest.writeString(excludedApplications);
         }
     }
 }

app/src/main/java/com/wireguard/config/Peer.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.config;
@@ -10,6 +10,7 @@ import android.databinding.BaseObservable;
 import android.databinding.Bindable;
 import android.os.Parcel;
 import android.os.Parcelable;
+import android.support.annotation.Nullable;
 
 import com.android.databinding.library.baseAdapters.BR;
 import com.wireguard.crypto.KeyEncoding;
@@ -20,25 +21,30 @@ import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.UnknownHostException;
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 
+import java9.lang.Iterables;
+
 /**
  * Represents the configuration for a WireGuard peer (a [Peer] block).
  */
 
 public class Peer {
     private final List<InetNetwork> allowedIPsList;
-    private InetSocketAddress endpoint;
+    @Nullable private InetSocketAddress endpoint;
     private int persistentKeepalive;
-    private String preSharedKey;
-    private String publicKey;
+    @Nullable private String preSharedKey;
+    @Nullable private String publicKey;
 
     public Peer() {
         allowedIPsList = new ArrayList<>();
     }
 
-    private void addAllowedIPs(final String[] allowedIPs) {
+    private void addAllowedIPs(@Nullable final String[] allowedIPs) {
         if (allowedIPs != null && allowedIPs.length > 0) {
             for (final String allowedIP : allowedIPs) {
                 allowedIPsList.add(new InetNetwork(allowedIP));
@@ -50,16 +56,19 @@ public class Peer {
         return allowedIPsList.toArray(new InetNetwork[allowedIPsList.size()]);
     }
 
+    @Nullable
     private String getAllowedIPsString() {
         if (allowedIPsList.isEmpty())
             return null;
         return Attribute.iterableToString(allowedIPsList);
     }
 
+    @Nullable
     public InetSocketAddress getEndpoint() {
         return endpoint;
     }
 
+    @Nullable
     private String getEndpointString() {
         if (endpoint == null)
             return null;
@@ -70,16 +79,19 @@ public class Peer {
         return persistentKeepalive;
     }
 
+    @Nullable
     private String getPersistentKeepaliveString() {
         if (persistentKeepalive == 0)
             return null;
         return Integer.valueOf(persistentKeepalive).toString();
     }
 
+    @Nullable
     public String getPreSharedKey() {
         return preSharedKey;
     }
 
+    @Nullable
     public String getPublicKey() {
         return publicKey;
     }
@@ -125,16 +137,16 @@ public class Peer {
         }
     }
 
-    private void setAllowedIPsString(final String allowedIPsString) {
+    private void setAllowedIPsString(@Nullable final String allowedIPsString) {
         allowedIPsList.clear();
         addAllowedIPs(Attribute.stringToList(allowedIPsString));
     }
 
-    private void setEndpoint(final InetSocketAddress endpoint) {
+    private void setEndpoint(@Nullable final InetSocketAddress endpoint) {
         this.endpoint = endpoint;
     }
 
-    private void setEndpointString(final String endpoint) {
+    private void setEndpointString(@Nullable final String endpoint) {
         if (endpoint != null && !endpoint.isEmpty()) {
             final InetSocketAddress constructedEndpoint;
             if (endpoint.indexOf('/') != -1 || endpoint.indexOf('?') != -1 || endpoint.indexOf('#') != -1)
@@ -155,14 +167,14 @@ public class Peer {
         this.persistentKeepalive = persistentKeepalive;
     }
 
-    private void setPersistentKeepaliveString(final String persistentKeepalive) {
+    private void setPersistentKeepaliveString(@Nullable final String persistentKeepalive) {
         if (persistentKeepalive != null && !persistentKeepalive.isEmpty())
             setPersistentKeepalive(Integer.parseInt(persistentKeepalive, 10));
         else
             setPersistentKeepalive(0);
     }
 
-    private void setPreSharedKey(String preSharedKey) {
+    private void setPreSharedKey(@Nullable String preSharedKey) {
         if (preSharedKey != null && preSharedKey.isEmpty())
             preSharedKey = null;
         if (preSharedKey != null)
@@ -170,7 +182,7 @@ public class Peer {
         this.preSharedKey = preSharedKey;
     }
 
-    private void setPublicKey(String publicKey) {
+    private void setPublicKey(@Nullable String publicKey) {
         if (publicKey != null && publicKey.isEmpty())
             publicKey = null;
         if (publicKey != null)
@@ -206,11 +218,13 @@ public class Peer {
                 return new Observable[size];
             }
         };
-        private String allowedIPs;
-        private String endpoint;
-        private String persistentKeepalive;
-        private String preSharedKey;
-        private String publicKey;
+        @Nullable private String allowedIPs;
+        @Nullable private String endpoint;
+        @Nullable private String persistentKeepalive;
+        @Nullable private String preSharedKey;
+        @Nullable private String publicKey;
+        private final List<String> interfaceDNSRoutes = new ArrayList<>();
+        private int numSiblings;
 
         public Observable(final Peer parent) {
             loadData(parent);
@@ -222,6 +236,8 @@ public class Peer {
             persistentKeepalive = in.readString();
             preSharedKey = in.readString();
             publicKey = in.readString();
+            numSiblings = in.readInt();
+            in.readStringList(interfaceDNSRoutes);
         }
 
         public static Observable newInstance() {
@@ -245,32 +261,61 @@ public class Peer {
             return 0;
         }
 
+        private static final String DEFAULT_ROUTE_V4 = "0.0.0.0/0";
+        private static final List<String> DEFAULT_ROUTE_MOD_RFC1918_V4 = Arrays.asList("0.0.0.0/5", "8.0.0.0/7", "11.0.0.0/8", "12.0.0.0/6", "16.0.0.0/4", "32.0.0.0/3", "64.0.0.0/2", "128.0.0.0/3", "160.0.0.0/5", "168.0.0.0/6", "172.0.0.0/12", "172.32.0.0/11", "172.64.0.0/10", "172.128.0.0/9", "173.0.0.0/8", "174.0.0.0/7", "176.0.0.0/4", "192.0.0.0/9", "192.128.0.0/11", "192.160.0.0/13", "192.169.0.0/16", "192.170.0.0/15", "192.172.0.0/14", "192.176.0.0/12", "192.192.0.0/10", "193.0.0.0/8", "194.0.0.0/7", "196.0.0.0/6", "200.0.0.0/5", "208.0.0.0/4");
+
+        public void toggleExcludePrivateIPs() {
+            final Collection<String> ips = new HashSet<>(Arrays.asList(Attribute.stringToList(allowedIPs)));
+            final boolean hasDefaultRoute = ips.contains(DEFAULT_ROUTE_V4);
+            final boolean hasDefaultRouteModRFC1918 = ips.containsAll(DEFAULT_ROUTE_MOD_RFC1918_V4);
+            if ((!hasDefaultRoute && !hasDefaultRouteModRFC1918) || numSiblings > 0)
+                return;
+            Iterables.removeIf(ips, ip -> !ip.contains(":"));
+            if (hasDefaultRoute) {
+                ips.addAll(DEFAULT_ROUTE_MOD_RFC1918_V4);
+                ips.addAll(interfaceDNSRoutes);
+            } else if (hasDefaultRouteModRFC1918)
+                ips.add(DEFAULT_ROUTE_V4);
+            setAllowedIPs(Attribute.iterableToString(ips));
+        }
+
         @Bindable
+        public boolean getCanToggleExcludePrivateIPs() {
+            final Collection<String> ips = Arrays.asList(Attribute.stringToList(allowedIPs));
+            return numSiblings == 0 && (ips.contains(DEFAULT_ROUTE_V4) || ips.containsAll(DEFAULT_ROUTE_MOD_RFC1918_V4));
+        }
+
+        @Bindable
+        public boolean getIsExcludePrivateIPsOn() {
+            return numSiblings == 0 && Arrays.asList(Attribute.stringToList(allowedIPs)).containsAll(DEFAULT_ROUTE_MOD_RFC1918_V4);
+        }
+
+        @Bindable @Nullable
         public String getAllowedIPs() {
             return allowedIPs;
         }
 
-        @Bindable
+        @Bindable @Nullable
         public String getEndpoint() {
             return endpoint;
         }
 
-        @Bindable
+        @Bindable @Nullable
         public String getPersistentKeepalive() {
             return persistentKeepalive;
         }
 
-        @Bindable
+        @Bindable @Nullable
         public String getPreSharedKey() {
             return preSharedKey;
         }
 
-        @Bindable
+        @Bindable @Nullable
         public String getPublicKey() {
             return publicKey;
         }
 
-        protected void loadData(final Peer parent) {
+        private void loadData(final Peer parent) {
             allowedIPs = parent.getAllowedIPsString();
             endpoint = parent.getEndpointString();
             persistentKeepalive = parent.getPersistentKeepaliveString();
@@ -281,6 +326,8 @@ public class Peer {
         public void setAllowedIPs(final String allowedIPs) {
             this.allowedIPs = allowedIPs;
             notifyPropertyChanged(BR.allowedIPs);
+            notifyPropertyChanged(BR.canToggleExcludePrivateIPs);
+            notifyPropertyChanged(BR.isExcludePrivateIPsOn);
         }
 
         public void setEndpoint(final String endpoint) {
@@ -303,6 +350,27 @@ public class Peer {
             notifyPropertyChanged(BR.publicKey);
         }
 
+        public void setInterfaceDNSRoutes(@Nullable final String dnsServers) {
+            final Collection<String> ips = new HashSet<>(Arrays.asList(Attribute.stringToList(allowedIPs)));
+            final boolean modifyAllowedIPs = ips.containsAll(DEFAULT_ROUTE_MOD_RFC1918_V4);
+
+            ips.removeAll(interfaceDNSRoutes);
+            interfaceDNSRoutes.clear();
+            for (final String dnsServer : Attribute.stringToList(dnsServers)) {
+                if (!dnsServer.contains(":"))
+                    interfaceDNSRoutes.add(dnsServer + "/32");
+            }
+            ips.addAll(interfaceDNSRoutes);
+            if (modifyAllowedIPs)
+                setAllowedIPs(Attribute.iterableToString(ips));
+        }
+
+        public void setNumSiblings(final int num) {
+            numSiblings = num;
+            notifyPropertyChanged(BR.canToggleExcludePrivateIPs);
+            notifyPropertyChanged(BR.isExcludePrivateIPsOn);
+        }
+
         @Override
         public void writeToParcel(final Parcel dest, final int flags) {
             dest.writeString(allowedIPs);
@@ -310,6 +378,8 @@ public class Peer {
             dest.writeString(persistentKeepalive);
             dest.writeString(preSharedKey);
             dest.writeString(publicKey);
+            dest.writeInt(numSiblings);
+            dest.writeStringList(interfaceDNSRoutes);
         }
     }
 }

app/src/main/java/com/wireguard/crypto/Curve25519.java

@@ -1,10 +1,12 @@
 /*
  * Copyright © 2016 Southern Storm Software, Pty Ltd.
- * SPDX-License-Identifier: MIT
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.crypto;
 
+import android.support.annotation.Nullable;
+
 import java.util.Arrays;
 
 /**
@@ -93,7 +95,7 @@ public final class Curve25519 {
      *                   if the base point of the curve should be used.
      */
     public static void eval(final byte[] result, final int offset,
-                            final byte[] privateKey, final byte[] publicKey) {
+                            final byte[] privateKey, @Nullable final byte[] publicKey) {
         final Curve25519 state = new Curve25519();
         try {
             // Unpack the public key value.  If null, use 9 as the base point.

app/src/main/java/com/wireguard/crypto/KeyEncoding.java

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.crypto;

app/src/main/java/com/wireguard/crypto/Keypair.java

@@ -1,7 +1,7 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
  * Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.crypto;

app/src/main/java/com/wireguard/util/Keyed.java

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.util;

app/src/main/java/com/wireguard/util/KeyedList.java

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.util;

app/src/main/java/com/wireguard/util/NonNullForAll.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2018 Eric Kuck <eric@bluelinelabs.com>.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.util;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import javax.annotation.Nonnull;
+import javax.annotation.meta.TypeQualifierDefault;
+
+/**
+ * This annotation can be applied to a package, class or method to indicate that all
+ * class fields and method parameters and return values in that element are nonnull
+ * by default unless overridden.
+ */
+@Documented
+@Nonnull
+@TypeQualifierDefault({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface NonNullForAll { }

app/src/main/java/com/wireguard/util/SortedKeyedList.java

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2018 Samuel Holland <samuel@sholland.org>
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.util;

app/src/main/res/drawable/ic_action_add_inverse.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="?android:attr/colorBackground"
+        android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z" />
+</vector>

app/src/main/res/drawable/ic_action_select_all.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:width="24dp"
+    android:height="24dp">
+    <path
+        android:fillColor="?android:attr/colorForeground"
+        android:pathData="M3 5L5 5 5 3C3.9 3 3 3.9 3 5Zm0 8l2 0 0 -2 -2 0 0 2zm4 8l2 0 0 -2 -2 0 0 2zM3 9L5 9 5 7 3 7 3 9Zm10 -6l-2 0 0 2 2 0 0 -2zm6 0l0 2 2 0C21 3.9 20.1 3 19 3ZM5 21L5 19 3 19c0 1.1 0.9 2 2 2zm-2 -4l2 0 0 -2 -2 0 0 2zM9 3L7 3 7 5 9 5 9 3Zm2 18l2 0 0 -2 -2 0 0 2zm8 -8l2 0 0 -2 -2 0 0 2zm0 8c1.1 0 2 -0.9 2 -2l-2 0 0 2zm0 -12l2 0 0 -2 -2 0 0 2zm0 8l2 0 0 -2 -2 0 0 2zm-4 4l2 0 0 -2 -2 0 0 2zm0 -16l2 0 0 -2 -2 0 0 2zM7 17L17 17 17 7 7 7 7 17Zm2 -8l6 0 0 6 -6 0 0 -6z" />
+</vector>

app/src/main/res/drawable/ic_tile_disabled.xml

@@ -1,29 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="400dp"
-    android:height="400dp"
-    android:viewportHeight="400.0"
-    android:viewportWidth="400.0">
-    <path
-        android:fillAlpha="1"
-        android:fillColor="#ffffff"
-        android:pathData="M197.7,0C191.5,0.1 185.2,0.5 178.7,1.1C191.1,4 202.2,6.6 213.4,9.2C213.3,9.8 213.1,10.5 213,11.2C198.1,13.2 183.9,7.7 169.3,5.7C174.6,8.8 180,11.7 185.5,14.2C191.2,16.7 197,18.8 202.8,21.2C195.4,27.5 188,28.8 178.7,26.7C173.7,25.6 168.3,25 163.1,25.2C157.8,25.5 152.4,26.8 147.5,30C152.7,32.7 157.5,34.8 162.1,37.5C163.9,38.6 166.1,40.4 166.6,42.4C167.8,46.9 168.2,51.8 168.9,56.5C160.4,57.5 145.4,66.1 142.4,71.7C155.5,74.3 169.7,71.2 182.2,79.6C178.1,82.8 168.5,86.6 165,89.3C169.3,90.4 179.4,89.9 183.3,89.6C186.6,89.4 188.2,89.3 189.5,90.4L228,120.6C232.1,123.8 248.4,139.3 252.7,149C256.3,157.3 256.8,164.4 256.8,166.1C256.8,170.7 256.2,177.9 253,186C252.7,186.9 252,188.3 251.2,189.8L280.8,219.4C288.3,207.7 293.4,194.5 296.3,180C299.6,163.2 299.4,146.5 291.7,130.5C285.8,118.3 276.1,109.4 265.8,101.3C255.1,93 243.7,85.4 233.1,77C230.2,74.8 228.3,70.8 226.9,67.3C226.4,65.8 228.2,61.7 229.4,61.5C236,60.3 242.6,59.7 249.3,59.4C256.9,59.2 264.6,59.4 272.3,59.5C274,59.5 276.2,59.3 277.2,60.3C281.2,64.2 284.3,61.6 287,59.1C289.4,56.9 291,54 292.9,51.6C291.7,51.4 289.4,50.9 287.1,50.8C279.4,50.6 271.7,50.7 264,50.5C262.6,50.4 261.3,49 259.9,48.2C261.3,47.6 262.8,46.6 264.2,46.6C277.5,46.5 290.8,46.5 304.1,46.5C304.2,39.6 294.9,30.1 286.7,27.5C286.6,28.5 286.5,29.3 286.5,30.3C278.3,30.5 270.3,30.3 263,26.4C261.1,25.4 259.8,23.1 258.3,21.5C256.3,19.3 254.7,16.6 252.3,15.2C247.4,12.3 242,10.3 236.9,7.8C224.3,1.7 211.3,-0.1 197.7,0zM249.6,29.4C250.3,29.4 250.9,29.6 251.6,30.2C252.6,31 253.6,31.9 254.8,33C253.3,33.8 252,34.5 250.8,35.1C249,36 247.6,35.4 246.5,34C245.6,32.8 245.5,31.7 246.8,30.7C247.7,30 248.6,29.4 249.6,29.4zM231.8,213C220.7,221.9 207.6,227.2 193.6,230.1C152.7,238.5 118.7,282.2 128.3,330.3C139.5,386.5 201.5,416.9 252.2,390.2C285,372.9 302.3,339.2 297.7,302.5C295.9,288.1 291,275.4 283.1,264.3L265.1,246.3C264.2,246.2 263.2,246.6 261.9,247.5C253.1,253.1 244.2,258.4 235.1,263.4C229.9,266.2 224.2,268.3 217.7,271.2C219.9,271.8 221,272.1 222.1,272.4C246.5,278.9 259.6,300.3 253.8,324.4C248.7,345.7 227,359.4 205.9,355.8C188.4,352.8 173.1,338.2 170.5,320.8C167.8,301.8 177.2,283.5 194.1,275.9C203.4,271.6 213,267.9 222.3,263.6C232.9,258.7 244.4,254.9 253.6,248.1C256.2,246.2 258.7,244.2 261,242.2L231.8,213z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1.3750788" />
-    <path
-        android:fillAlpha="1"
-        android:fillColor="#ffffff"
-        android:pathData="m97.9,307.6c-7.8,2 -15.4,4.9 -23.4,7.5 3.9,-26.3 34.7,-50.6 60.8,-47.8 -8.1,10.9 -11.8,23.3 -12.7,35.6 -8.7,1.6 -16.8,2.7 -24.8,4.7"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1.3750788" />
-    <path
-        android:fillAlpha="1"
-        android:fillColor="#ffffff"
-        android:pathData="M177,111.6C175.7,111.6 174.4,111.7 173.1,111.7L247,185.6C248.1,183.2 249,180.6 249.9,177.9C252.2,170.4 251.8,159.3 248,152.1C234.7,126.6 206.6,111.3 177,111.6zM139.7,120.9C137.9,121.8 136.1,122.9 134.3,124C81.2,156.4 84.3,231 132.9,260.7C136.6,263 138.3,262.7 140.8,259.4C148.4,249.2 157.9,241.1 169,234.9C171.7,233.3 174.5,231.9 178.1,230C154,225.8 141.1,214.8 139.6,197.8C137.9,179.4 146.9,164.5 163.2,158.3C167,156.9 171,156.2 174.9,156.1L139.7,120.9zM212.5,193.7C212.5,195.8 212.3,197.9 211.8,200.1C209.9,210.5 203.6,218.1 195.8,224.8C208.5,221.9 219.6,216.9 228.6,209.7L212.5,193.7z"
-        android:strokeColor="#00000000"
-        android:strokeWidth="1.3750788" />
-    <path
-        android:fillAlpha="1"
-        android:fillColor="#ffffff"
-        android:pathData="M78.4,59.6l262,262l-21.3,21.3l-262,-262z"
-        android:strokeWidth="0.82064575" />
-</vector>

app/src/main/res/drawable/list_item_background_anim.xml

@@ -2,4 +2,5 @@
 <ripple xmlns:android="http://schemas.android.com/apk/res/android"
     android:color="@color/list_item_ripple"> <!-- TODO(msf): themeify this -->
     <item android:drawable="@drawable/list_item_background" />
+    <item android:id="@android:id/mask" android:drawable="@android:color/white" />
 </ripple>

app/src/main/res/layout/app_list_dialog_fragment.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+
+        <import type="android.view.View" />
+
+        <import type="com.wireguard.android.model.ApplicationData" />
+
+        <variable
+            name="fragment"
+            type="com.wireguard.android.fragment.AppListDialogFragment" />
+
+        <variable
+            name="appData"
+            type="com.wireguard.android.util.ObservableKeyedList&lt;String, ApplicationData&gt;" />
+    </data>
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:minHeight="200dp" >
+
+        <ProgressBar
+            android:id="@+id/progress_bar"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:indeterminate="true"
+            android:visibility="@{appData.isEmpty() ? View.VISIBLE : View.GONE}"/>
+
+        <android.support.v7.widget.RecyclerView
+            android:id="@+id/app_list"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:items="@{appData}"
+            app:layout="@{@layout/app_list_item}" />
+
+    </FrameLayout>
+
+
+</layout>

app/src/main/res/layout/app_list_item.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+
+        <import type="com.wireguard.android.model.ApplicationData" />
+
+        <variable
+            name="collection"
+            type="com.wireguard.android.util.ObservableKeyedList&lt;String, com.wireguard.android.model.ApplicationData&gt;" />
+
+        <variable
+            name="key"
+            type="String" />
+
+        <variable
+            name="item"
+            type="com.wireguard.android.model.ApplicationData" />
+    </data>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/list_item_background_anim"
+        android:padding="16dp"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:onClick="@{(view) -> item.setExcludedFromTunnel(!item.excludedFromTunnel)}">
+
+        <ImageView
+            android:id="@+id/app_icon"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:src="@{item.icon}" />
+
+        <TextView
+            android:id="@+id/app_name"
+            style="?android:attr/textAppearanceMedium"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:paddingEnd="8dp"
+            android:paddingStart="8dp"
+            android:text="@{key}" />
+
+        <CheckBox
+            android:id="@+id/excluded_checkbox"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:checked="@={item.excludedFromTunnel}" />
+
+    </LinearLayout>
+</layout>

app/src/main/res/layout/tunnel_detail_fragment.xml

@@ -5,12 +5,14 @@
 
     <data>
 
-        <import type="com.wireguard.android.fragment.TunnelController" />
-
         <import type="com.wireguard.android.model.Tunnel.State" />
 
         <import type="com.wireguard.android.util.ClipboardUtils" />
 
+        <variable
+            name="fragment"
+            type="com.wireguard.android.fragment.TunnelDetailFragment" />
+
         <variable
             name="tunnel"
             type="com.wireguard.android.model.Tunnel" />
@@ -63,7 +65,7 @@
                         android:layout_alignBaseline="@+id/interface_title"
                         android:layout_alignParentEnd="true"
                         app:checked="@{tunnel.state == State.UP}"
-                        app:onBeforeCheckedChanged="@{TunnelController::setTunnelState}" />
+                        app:onBeforeCheckedChanged="@{fragment::setTunnelState}" />
 
                     <TextView
                         android:id="@+id/interface_name_label"

app/src/main/res/layout/tunnel_editor_fragment.xml

@@ -13,6 +13,10 @@
 
         <import type="com.wireguard.config.Peer" />
 
+        <variable
+            name="fragment"
+            type="com.wireguard.android.fragment.TunnelEditorFragment" />
+
         <variable
             name="config"
             type="com.wireguard.config.Config.Observable" />
@@ -96,6 +100,7 @@
                             app:filter="@{KeyInputFilter.newInstance()}" />
 
                         <Button
+                            style="@style/Widget.AppCompat.Button.Borderless.Colored"
                             android:id="@+id/generate_private_key_button"
                             android:layout_width="96dp"
                             android:layout_height="wrap_content"
@@ -210,6 +215,16 @@
                             android:inputType="number"
                             android:text="@={config.interfaceSection.mtu}"
                             android:textAlignment="center" />
+
+                        <Button
+                            style="@style/Widget.AppCompat.Button.Borderless.Colored"
+                            android:id="@+id/set_excluded_applications"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:layout_marginLeft="-8dp"
+                            android:layout_below="@+id/dns_servers_text"
+                            android:onClick="@{fragment::onRequestSetExcludedApplications}"
+                            android:text="@{@plurals/set_excluded_applications(config.interfaceSection.excludedApplicationsCount, config.interfaceSection.excludedApplicationsCount)}" />
                     </RelativeLayout>
                 </android.support.v7.widget.CardView>
 
@@ -223,6 +238,7 @@
                     tools:ignore="UselessLeaf" />
 
                 <Button
+                    style="@style/Widget.AppCompat.Button.Colored"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="4dp"

app/src/main/res/layout/tunnel_editor_peer.xml

@@ -4,6 +4,7 @@
 
     <data>
 
+        <import type="android.view.View"/>
         <import type="com.wireguard.android.widget.KeyInputFilter" />
 
         <variable
@@ -92,9 +93,21 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_below="@+id/pre_shared_key_text"
+                android:layout_toStartOf="@+id/exclude_private_ips"
                 android:labelFor="@+id/allowed_ips_text"
                 android:text="@string/allowed_ips" />
 
+            <CheckBox
+                android:id="@+id/exclude_private_ips"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignBaseline="@+id/allowed_ips_label"
+                android:layout_alignParentEnd="true"
+                android:checked="@{item.isExcludePrivateIPsOn}"
+                android:onClick="@{() -> item.toggleExcludePrivateIPs()}"
+                android:text="@string/exclude_private_ips"
+                android:visibility="@{item.canToggleExcludePrivateIPs ? View.VISIBLE : View.GONE}" />
+
             <EditText
                 android:id="@+id/allowed_ips_text"
                 android:layout_width="match_parent"

app/src/main/res/layout/tunnel_list_fragment.xml

@@ -10,6 +10,10 @@
             name="fragment"
             type="com.wireguard.android.fragment.TunnelListFragment" />
 
+        <variable
+            name="rowConfigurationHandler"
+            type="com.wireguard.android.databinding.ObservableKeyedRecyclerViewAdapter.RowConfigurationHandler" />
+
         <variable
             name="tunnels"
             type="com.wireguard.android.util.ObservableKeyedList&lt;String, Tunnel&gt;" />
@@ -19,42 +23,44 @@
         android:id="@+id/main_container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="?android:attr/colorBackground">
+        android:background="?android:attr/colorBackground"
+        android:clipChildren="false">
 
-        <ListView
+        <android.support.v7.widget.RecyclerView
             android:id="@+id/tunnel_list"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:choiceMode="multipleChoiceModal"
             app:items="@{tunnels}"
-            app:layout="@{@layout/tunnel_list_item}" />
+            app:layout="@{@layout/tunnel_list_item}"
+            app:configurationHandler="@{rowConfigurationHandler}" />
 
         <com.wireguard.android.widget.fab.FloatingActionsMenu
             android:id="@+id/create_menu"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="bottom|end"
-            android:layout_margin="8dp"
+            android:layout_margin="16dp"
             app:fab_labelStyle="@style/fab_label"
-            app:fab_labelsPosition="left"
-            app:layout_dodgeInsetEdges="bottom">
+            android:clipChildren="false"
+            app:fab_labelsPosition="left" >
 
-            <com.wireguard.android.widget.fab.FloatingActionButton
+            <com.wireguard.android.widget.fab.LabeledFloatingActionButton
                 android:id="@+id/create_empty"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:onClick="@{fragment::onRequestCreateConfig}"
-                app:fab_icon="@drawable/ic_action_edit_inverse"
-                app:fab_size="mini"
+                app:fabSize="mini"
+                app:srcCompat="@drawable/ic_action_edit_inverse"
                 app:fab_title="@string/create_empty" />
 
-            <com.wireguard.android.widget.fab.FloatingActionButton
+            <com.wireguard.android.widget.fab.LabeledFloatingActionButton
                 android:id="@+id/create_from_file"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:onClick="@{fragment::onRequestImportConfig}"
-                app:fab_icon="@drawable/ic_action_open_inverse"
-                app:fab_size="mini"
+                app:srcCompat="@drawable/ic_action_open_inverse"
+                app:fabSize="mini"
                 app:fab_title="@string/create_from_file" />
         </com.wireguard.android.widget.fab.FloatingActionsMenu>
     </android.support.design.widget.CoordinatorLayout>

app/src/main/res/layout/tunnel_list_item.xml

@@ -4,8 +4,6 @@
 
     <data>
 
-        <import type="com.wireguard.android.fragment.TunnelController" />
-
         <import type="com.wireguard.android.model.Tunnel" />
 
         <import type="com.wireguard.android.model.Tunnel.State" />
@@ -21,6 +19,10 @@
         <variable
             name="item"
             type="com.wireguard.android.model.Tunnel" />
+
+        <variable
+            name="fragment"
+            type="com.wireguard.android.fragment.TunnelListFragment" />
     </data>
 
     <RelativeLayout
@@ -49,6 +51,6 @@
             android:layout_alignBaseline="@+id/tunnel_name"
             android:layout_alignParentEnd="true"
             app:checked="@{item.state == State.UP}"
-            app:onBeforeCheckedChanged="@{TunnelController::setTunnelState}" />
+            app:onBeforeCheckedChanged="@{fragment::setTunnelState}" />
     </RelativeLayout>
 </layout>

app/src/main/res/menu/tunnel_list_action_mode.xml

@@ -1,6 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/menu_action_select_all"
+        android:alphabeticShortcut="s"
+        android:icon="@drawable/ic_action_select_all"
+        android:title="@string/select_all"
+        app:showAsAction="always" />
     <item
         android:id="@+id/menu_action_delete"
         android:alphabeticShortcut="d"

app/src/main/res/values/fab.xml

@@ -3,46 +3,18 @@
     <item name="fab_expand_menu_button" type="id"/>
     <item name="fab_label" type="id"/>
 
-    <dimen name="fab_size_normal">56dp</dimen>
-    <dimen name="fab_size_mini">40dp</dimen>
-
-    <dimen name="fab_icon_size">24dp</dimen>
-
-    <dimen name="fab_plus_icon_size">14dp</dimen>
-    <dimen name="fab_plus_icon_stroke">2dp</dimen>
-
     <dimen name="fab_shadow_offset">3dp</dimen>
     <dimen name="fab_shadow_radius">9dp</dimen>
 
     <dimen name="fab_stroke_width">1dp</dimen>
 
-    <dimen name="fab_actions_spacing">16dp</dimen>
+    <dimen name="fab_actions_spacing">24dp</dimen>
     <dimen name="fab_labels_margin">8dp</dimen>
 
-    <declare-styleable name="FloatingActionButton">
-        <attr name="fab_colorPressed" format="color"/>
-        <attr name="fab_colorDisabled" format="color"/>
-        <attr name="fab_colorNormal" format="color"/>
-        <attr name="fab_icon" format="reference"/>
-        <attr name="fab_size" format="enum">
-            <enum name="normal" value="0"/>
-            <enum name="mini" value="1"/>
-        </attr>
+    <declare-styleable name="LabeledFloatingActionButton">
         <attr name="fab_title" format="string"/>
-        <attr name="fab_stroke_visible" format="boolean"/>
-    </declare-styleable>
-    <declare-styleable name="AddFloatingActionButton">
-        <attr name="fab_plusIconColor" format="color"/>
     </declare-styleable>
     <declare-styleable name="FloatingActionsMenu">
-        <attr name="fab_addButtonColorPressed" format="color"/>
-        <attr name="fab_addButtonColorNormal" format="color"/>
-        <attr name="fab_addButtonSize" format="enum">
-            <enum name="normal" value="0"/>
-            <enum name="mini" value="1"/>
-        </attr>
-        <attr name="fab_addButtonPlusIconColor" format="color"/>
-        <attr name="fab_addButtonStrokeVisible" format="boolean"/>
         <attr name="fab_labelStyle" format="reference"/>
         <attr name="fab_labelsPosition" format="enum">
             <enum name="left" value="0"/>

app/src/main/res/values/strings.xml

@@ -24,6 +24,7 @@
     <string name="addresses">Addresses</string>
     <string name="allowed_ips">Allowed IPs</string>
     <string name="app_name">WireGuard</string>
+    <string name="cancel">Cancel</string>
     <string name="config_save_error">Unable to save configuration for “%s”: %s</string>
     <string name="config_save_success">Successfully saved configuration for “%s”</string>
     <string name="create_activity_title">Create WireGuard Tunnel</string>
@@ -33,12 +34,17 @@
     <string name="dark_theme_summary_on">Currently using dark night theme</string>
     <string name="dark_theme_summary_off">Currently using light day theme</string>
     <string name="delete">Delete</string>
+    <string name="deselect_all">Deselect All</string>
+    <string name="select_all">Select all</string>
     <string name="dns_servers">DNS servers</string>
     <string name="edit">Edit</string>
     <string name="endpoint">Endpoint</string>
+    <string name="error_fetching_apps">Error fetching apps list: %s</string>
     <string name="error_down">Error bringing down tunnel: %s</string>
     <string name="error_root">Please obtain root access and try again</string>
     <string name="error_up">Error bringing up tunnel: %s</string>
+    <string name="excluded_applications">Excluded Applications</string>
+    <string name="exclude_private_ips">Exclude private IPs</string>
     <string name="generate">Generate</string>
     <string name="hint_automatic">(auto)</string>
     <string name="hint_generated">(generated)</string>
@@ -65,6 +71,11 @@
     <string name="restore_on_boot_summary">Bring up previously-enabled tunnels on boot</string>
     <string name="restore_on_boot_title">Restore on boot</string>
     <string name="save">Save</string>
+    <plurals name="set_excluded_applications">
+        <item quantity="one">%d Excluded Application</item>
+        <item quantity="other">%d Excluded Applications</item>
+    </plurals>
+    <string name="set_exclusions">Set Exclusions</string>
     <string name="settings">Settings</string>
     <string name="toggle_error">Error toggling WireGuard tunnel: %s</string>
     <string name="tools_installer_already">wg and wg-quick are already installed</string>

app/tools/CMakeLists.txt

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-License-Identifier: Apache-2.0
 #
 # Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 

app/tools/libwg-go/Makefile

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: Apache-2.0
 #
 # Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 

app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later
+/* SPDX-License-Identifier: Apache-2.0
  *
  * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  */

app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later
+/* SPDX-License-Identifier: Apache-2.0
  *
  * Copyright © 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  */