Fix demo crash when using R8 full mode (close #652) (#663)

* Add R8 to compose demo

* Add rules to allow reflection

gradle.properties

@@ -50,3 +50,4 @@ POM_LICENCE_DIST=repo
 
 POM_DEVELOPER_ID=snowplow
 POM_DEVELOPER_NAME=Snowplow Analytics
+android.enableR8.fullMode=true

snowplow-demo-compose/build.gradle

@@ -20,7 +20,8 @@ android {
 
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
+            shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
@@ -60,6 +61,11 @@ dependencies {
 
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation project(':snowplow-android-tracker')
+
+    implementation 'com.google.android.gms:play-services-appset:16.0.2'
+    implementation 'com.google.android.gms:play-services-ads:22.6.0'
+    implementation 'com.google.android.gms:play-services-ads-identifier:18.0.1'
+    implementation "com.android.installreferrer:installreferrer:2.2"
 
     implementation "com.squareup.retrofit2:retrofit:2.9.0"
     implementation "com.squareup.retrofit2:converter-gson:2.0.0"

snowplow-demo-compose/proguard-rules.pro

@@ -18,4 +18,19 @@
 
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
-#-renamesourcefileattribute SourceFile
+#-renamesourcefileattribute SourceFile
+
+# Fixes R8 full mode crash
+# Also see https://github.com/square/retrofit/issues/3751
+-keep,allowobfuscation,allowshrinking interface retrofit2.Call
+-keep,allowobfuscation,allowshrinking class retrofit2.Response
+-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
+
+# Reflection for the appSetId
+-keep class com.google.android.gms.appset.AppSet { *; }
+-keep class com.google.android.gms.appset.AppSetIdInfo { *; }
+-keep class com.google.android.gms.internal.appset.zzr { *; }
+-keep class com.google.android.gms.tasks.Tasks { *; }
+
+# Reflection for the AAID (AndroidIdfa)
+-keep class com.google.android.gms.ads.identifier.** { *; }

snowplow-demo-compose/src/main/AndroidManifest.xml

@@ -13,6 +13,10 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Snowplowandroidtracker">
+        <!-- Sample Ad Manager app ID: ca-app-pub-3940256099942544~3347511713 -->
+        <meta-data
+            android:name="com.google.android.gms.ads.APPLICATION_ID"
+            android:value="ca-app-pub-3940256099942544~3347511713"/>
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -24,5 +28,4 @@
             </intent-filter>
         </activity>
     </application>
-
 </manifest>

snowplow-demo-kotlin/proguard-rules.pro

@@ -18,4 +18,13 @@
 
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
-#-renamesourcefileattribute SourceFile
+#-renamesourcefileattribute SourceFile
+
+# Reflection for the appSetId
+-keep class com.google.android.gms.appset.AppSet { *; }
+-keep class com.google.android.gms.appset.AppSetIdInfo { *; }
+-keep class com.google.android.gms.internal.appset.zzr { *; }
+-keep class com.google.android.gms.tasks.Tasks { *; }
+
+# Reflection for the AAID (AndroidIdfa)
+-keep class com.google.android.gms.ads.identifier.** { *; }