show a toast in the qr activity if someone is joining

MessengerProj/src/main/java/com/b44t/messenger/MrMailbox.java

@@ -31,6 +31,7 @@ package com.b44t.messenger;
 import android.app.Activity;
 import android.content.SharedPreferences;
 import android.util.Log;
+import android.widget.Toast;
 
 import com.b44t.messenger.Components.ForegroundDetector;
 
@@ -220,6 +221,8 @@ public class MrMailbox {
     public final static int MR_EVENT_IMEX_PROGRESS            = 2051;
     public final static int MR_EVENT_IMEX_FILE_WRITTEN        = 2052;
 
+    public final static int MR_EVENT_SECURE_JOIN_REQUESTED    = 2060;
+
     public final static int MR_EVENT_IS_OFFLINE               = 2081;
     public final static int MR_EVENT_GET_STRING               = 2091;
     public final static int MR_EVENT_GET_QUANTITIY_STRING     = 2092;
@@ -264,6 +267,15 @@ public class MrMailbox {
                 }
                 return 0;
 
+            case MR_EVENT_SECURE_JOIN_REQUESTED:
+                AndroidUtilities.runOnUIThread(new Runnable() {
+                    @Override
+                    public void run() {
+                        NotificationCenter.getInstance().postNotificationName(NotificationCenter.secureJoinRequested, (int)data1);
+                    }
+                });
+                return 0;
+
             case MR_EVENT_MSGS_CHANGED:
             case MR_EVENT_INCOMING_MSG:
                 AndroidUtilities.runOnUIThread(new Runnable() {

MessengerProj/src/main/java/com/b44t/messenger/NotificationCenter.java

@@ -36,6 +36,7 @@ public class NotificationCenter {
     public static final int imexEnded = totalEvents++;
     public static final int imexProgress = totalEvents++;
     public static final int imexFileWritten = totalEvents++;
+    public static final int secureJoinRequested = totalEvents++;
     public static final int didReceivedNewMessages = totalEvents++;
     public static final int updateInterfaces = totalEvents++;
     public static final int dialogsNeedReload = totalEvents++;

MessengerProj/src/main/java/com/b44t/messenger/QRshowActivity.java

@@ -4,13 +4,14 @@ import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.app.Activity;
 import android.widget.ImageView;
+import android.widget.Toast;
 
 import com.google.zxing.BarcodeFormat;
 import com.google.zxing.MultiFormatWriter;
 import com.google.zxing.WriterException;
 import com.google.zxing.common.BitMatrix;
 
-public class QRshowActivity extends Activity {
+public class QRshowActivity extends Activity implements NotificationCenter.NotificationCenterDelegate {
 
     public final static int WHITE = 0xFFFFFFFF;
     public final static int BLACK = 0xFF000000;
@@ -29,6 +30,14 @@ public class QRshowActivity extends Activity {
         } catch (WriterException e) {
             e.printStackTrace();
         }
+
+        NotificationCenter.getInstance().addObserver(this, NotificationCenter.secureJoinRequested);
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        NotificationCenter.getInstance().removeObserver(this, NotificationCenter.secureJoinRequested);
     }
 
     Bitmap encodeAsBitmap(String str) throws WriterException {
@@ -56,4 +65,13 @@ public class QRshowActivity extends Activity {
         return bitmap;
     }
 
+    @Override
+    public void didReceivedNotification(int id, Object... args) {
+        if( id==NotificationCenter.secureJoinRequested ) {
+            int contact_id = (Integer)args[0];
+            String msg = String.format(ApplicationLoader.applicationContext.getString(R.string.OobSecureJoinRequested), MrMailbox.getContact(contact_id).getNameNAddr());
+            AndroidUtilities.showHint(ApplicationLoader.applicationContext, msg);
+        }
+    }
+
 }

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

@@ -435,4 +435,5 @@
     <string name="OobFingerprintOk">Contact <![CDATA[<i>]]>%1$s<![CDATA[</i>]]> verified. Start chatting?</string>
     <string name="OobFingerprintMismatch">The scanned fingerprint does <![CDATA[<b>]]>not match<![CDATA[</b>]]> the fingerprint last seen for <![CDATA[<i>]]>%1$s<![CDATA[</i>]]>.</string>
     <string name="OobFingerprintWithoutAddr">This QR code contains a fingerprint but no e-mail address.\n\nFor an out-of-band-verification, please establish an encrpyted connection to the recipient first.</string>
+    <string name="OobSecureJoinRequested">%1$s joins.</string>
 </resources>