Document ProGuard retrace usage in BUILDING.md

Agent-Logs-Url: https://github.com/ArcaneChat/android/sessions/9b58d3e8-6163-4dac-8ca0-d6e7fa2df3a8

Co-authored-by: adbenitez <24558636+adbenitez@users.noreply.github.com>

BUILDING.md

@@ -243,3 +243,14 @@ $ANDROID_NDK_ROOT/ndk-stack --sym obj/local/armeabi-v7a --dump crash.txt > decod
 `obj/local/armeabi-v7a` is the extracted path from `deltachat-gplay-release-X.X.X.apk-symbols.zip` file from https://download.delta.chat/android/symbols/
 
 Replace `armeabi-v7a` by the correct architecture the logs come from (can be guessed by trial and error)
+
+### Deobfuscating Java/Kotlin Stack Traces
+
+Because the app uses code minification (ProGuard/R8), Java stack traces in crash reports are obfuscated.
+To decode them, use `retrace` with the `mapping.txt` file that is included in the symbols zip:
+
+```
+retrace mapping.txt crash.txt > decoded-crash.txt
+```
+
+`mapping.txt` is extracted from the same `deltachat-gplay-release-X.X.X.apk-symbols.zip` file available at https://download.delta.chat/android/symbols/

scripts/upload-release.sh

@@ -34,6 +34,7 @@ cd ../..
 SYMBOLS_ZIP="$APK-symbols.zip"
 rm $SYMBOLS_ZIP
 zip -r $SYMBOLS_ZIP obj
+zip $SYMBOLS_ZIP build/outputs/mapping/gplayRelease/mapping.txt
 ls -l $SYMBOLS_ZIP
 rsync --progress $SYMBOLS_ZIP jekyll@download.delta.chat:/var/www/html/download/android/symbols/
 

src/main/res/drawable/circle_touch_highlight_background.xml

@@ -7,14 +7,4 @@
             <solid android:color="@color/black" />
         </shape>
     </item>
-    <item>
-        <selector>
-            <item android:state_focused="true">
-                <shape android:shape="oval">
-                    <solid android:color="@color/primary_alpha_focus" />
-                </shape>
-            </item>
-            <item android:drawable="@android:color/transparent" />
-        </selector>
-    </item>
 </ripple>

src/main/res/drawable/touch_highlight_background.xml

@@ -5,12 +5,4 @@
     <item
         android:id="@android:id/mask"
         android:drawable="@android:color/white" />
-    <item>
-        <selector>
-            <item
-                android:state_focused="true"
-                android:drawable="@color/primary_alpha_focus" />
-            <item android:drawable="@android:color/transparent" />
-        </selector>
-    </item>
 </ripple>