[FSSDK-11888] fix: update ProGuard rules for AGP 8+ and R8 compatibility

.github/workflows/flutter.yml

@@ -170,4 +170,4 @@ jobs:
         channel: 'stable'
         architecture: x64
     - run: flutter pub get
-    - run: flutter test
+    - run: flutter test

.github/workflows/minification.yml

@@ -0,0 +1,172 @@
+name: Minification Compatibility Test
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  workflow_dispatch:
+
+jobs:
+  minification_compatibility_test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: 'stable'
+          architecture: x64
+          cache: true
+
+      - name: Setup Java
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: Configure Gradle JVM options
+        run: |
+          mkdir -p ~/.gradle
+          cat > ~/.gradle/gradle.properties << 'EOF'
+          # Increase heap size for CI builds
+          org.gradle.jvmargs=-Xmx4g -XX:MaxMetaspaceSize=1g -XX:+HeapDumpOnOutOfMemoryError
+          org.gradle.daemon=true
+          org.gradle.parallel=true
+          org.gradle.configureondemand=true
+          android.enableJetifier=true
+          android.useAndroidX=true
+          EOF
+
+      - name: Configure Android build options
+        run: |
+          cat >> example/android/gradle.properties << 'EOF'
+          
+          # Memory optimization for CI
+          org.gradle.jvmargs=-Xmx3g -XX:MaxMetaspaceSize=512m
+          android.enableJetifier=true
+          android.useAndroidX=true
+          EOF
+
+      - name: Install dependencies
+        run: |
+          flutter pub get
+          cd example && flutter pub get
+
+      - name: Create ProGuard rules for example app
+        run: |
+          cat > example/android/app/proguard-rules.pro << 'EOF'
+          # Example app ProGuard rules for minification testing
+          
+          # Keep example app classes
+          -keep class com.optimizely.optimizely_flutter_sdk_example.** { *; }
+          
+          # Keep Flutter classes
+          -keep class io.flutter.app.** { *; }
+          -keep class io.flutter.plugins.GeneratedPluginRegistrant { *; }
+          
+          # Google Play Core (for Flutter engine)
+          -keep class com.google.android.play.core.** { *; }
+          -dontwarn com.google.android.play.core.**
+          
+          # Additional safety for Optimizely
+          -keep class com.optimizely.** { *; }
+          -dontwarn com.optimizely.**
+          
+          # Jackson JSON
+          -keep class com.fasterxml.jackson.** { *; }
+          -dontwarn com.fasterxml.jackson.**
+          
+          # Ignore missing classes
+          -dontwarn javax.mail.**
+          -dontwarn javax.activation.**
+          EOF
+
+      - name: Test with minification ENABLED
+        run: |
+          echo "🧪 Testing with minifyEnabled = true"
+          
+          # Backup original build.gradle
+          cp example/android/app/build.gradle example/android/app/build.gradle.backup
+          
+          # Enable minification
+          sed -i 's/minifyEnabled false/minifyEnabled true/' example/android/app/build.gradle
+          sed -i 's/shrinkResources false/shrinkResources true/' example/android/app/build.gradle
+          
+          # Ensure ProGuard rules are applied
+          if ! grep -q "proguardFiles.*proguard-rules.pro" example/android/app/build.gradle; then
+            sed -i '/minifyEnabled true/a\            proguardFiles getDefaultProguardFile('\''proguard-android-optimize.txt'\''), '\''proguard-rules.pro'\''' example/android/app/build.gradle
+          fi
+          
+          echo "📄 Build configuration with minification:"
+          grep -A 5 "buildTypes" example/android/app/build.gradle
+          
+          # Build for single architecture to save memory
+          cd example
+          flutter build apk --release --target-platform android-arm64 --split-per-abi
+          
+          echo "✅ Build successful with minification ENABLED"
+
+      - name: Test with minification DISABLED  
+        run: |
+          echo "🧪 Testing with minifyEnabled = false"
+          
+          # Restore original
+          cp example/android/app/build.gradle.backup example/android/app/build.gradle
+          sed -i 's/minifyEnabled true/minifyEnabled false/' example/android/app/build.gradle
+          sed -i 's/shrinkResources true/shrinkResources false/' example/android/app/build.gradle
+          
+          echo "📄 Build configuration without minification:"
+          grep -A 5 "buildTypes" example/android/app/build.gradle
+          
+          # Clean and build
+          cd example
+          flutter clean
+          flutter build apk --release --target-platform android-arm64 --split-per-abi
+          
+          echo "✅ Build successful with minification DISABLED"
+
+      - name: Run unit tests
+        run: flutter test
+
+      - name: Verify APK artifacts
+        run: |
+          echo "📱 Checking APK files:"
+          find example/build/app/outputs/apk/ -name "*.apk" -exec ls -la {} \;
+
+      - name: Check for ProGuard artifacts
+        run: |
+          echo "🔍 Checking for ProGuard/R8 artifacts:"
+          if [ -f "example/build/app/outputs/mapping/release/mapping.txt" ]; then
+            echo "✅ ProGuard mapping file found"
+            echo "📄 Mapping file size: $(wc -l < example/build/app/outputs/mapping/release/mapping.txt) lines"
+          else
+            echo "ℹ️ No mapping file found"
+          fi
+
+      - name: Upload APK artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: minification-test-apk
+          path: |
+            example/build/app/outputs/apk/release/*.apk
+            example/build/app/outputs/mapping/release/mapping.txt
+          retention-days: 7
+
+      - name: Report test results
+        run: |
+          echo "🎉 Minification compatibility test completed!"
+          echo "✅ minifyEnabled = true: PASSED"
+          echo "✅ minifyEnabled = false: PASSED" 
+          echo "✅ Memory optimizations applied successfully"
+
+      - name: Cleanup
+        if: always()
+        run: |
+          if [ -f "example/android/app/build.gradle.backup" ]; then
+            mv example/android/app/build.gradle.backup example/android/app/build.gradle
+            echo "✅ Restored original build.gradle"
+          fi

android/build.gradle

@@ -59,8 +59,8 @@ android {
 
     buildTypes {
         release {
-            minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            minifyEnabled true 
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt', 'proguard-rules.pro'
         }
     }
 

android/proguard-rules.txt

@@ -8,8 +8,28 @@
 # Add any project specific keep options here:
 
 # Optimizely
--keep class com.optimizely.optimizely_flutter_sdk.** {*;}
--keep class com.fasterxml.jackson.** {*;}
-# Logback
--keep class ch.qos.** { *; }
+-keep class com.optimizely.optimizely_flutter_sdk.OptimizelyFlutterSdkPlugin { *; }
+-keep class com.optimizely.optimizely_flutter_sdk.** { *; }
+-keep class com.optimizely.ab.** { *; }
+
+# Keep Jackson classes for JSON parsing
+-keep class com.fasterxml.jackson.** { *; }
+-dontwarn com.fasterxml.jackson.**
+
+# Keep Guava classes
+-keep class com.google.common.** { *; }
+-dontwarn com.google.common.**
+-dontwarn com.google.android.play.core.**
+
+# Keep SLF4J and Logback classes
+-keep class org.slf4j.** { *; }
+-keep class ch.qos.logback.** { *; }
+-dontwarn org.slf4j.**
+-dontwarn ch.qos.logback.**
+
+# Missing Dependencies (Android doesn't have these)
+-dontwarn javax.mail.**
+-dontwarn javax.activation.**
+-dontwarn javax.servlet.**
+
 ##---------------End: proguard configuration ----------

example/android/app/build.gradle

@@ -59,5 +59,5 @@ flutter {
 }
 
 dependencies {
-    implementation 'com.android.support:multidex:1.0.3'
+    implementation 'com.android.support:multidex:2.0.0'
 }