- Disabled R8 full mode (default for AGP 8.x)

- Updated GSON proguard rules

app/proguard-rules.pro

@@ -12,20 +12,39 @@
 #   public *;
 #}
 
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
 # Get deobfuscated crash reports with the Firebase Crashlytics SDK
 -keepattributes SourceFile,LineNumberTable        # Keep file names and line numbers.
 -keep public class * extends java.lang.Exception  # Optional: Keep custom exceptions.
 
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+##---------------Begin: proguard configuration for Gson  ----------
+# Gson uses generic type information stored in a class file when working with fields. Proguard
+# removes such information by default, so configure it to keep all of it.
+-keepattributes Signature
+
+# For using GSON @Expose annotation
+-keepattributes *Annotation*
+
+# Gson specific classes
+-dontwarn sun.misc.**
+#-keep class com.google.gson.stream.** { *; }
 
+# Application classes that will be serialized/deserialized over Gson
+-keep class com.google.gson.examples.android.model.** { <fields>; }
+
+# Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
+# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
+-keep class * extends com.google.gson.TypeAdapter
+-keep class * implements com.google.gson.TypeAdapterFactory
+-keep class * implements com.google.gson.JsonSerializer
+-keep class * implements com.google.gson.JsonDeserializer
+
+# Prevent R8 from leaving Data object members always null
 -keepclassmembers,allowobfuscation class * {
-	@com.google.gson.annotations.SerializedName <fields>;
-	@com.google.gson.annotations.Expose <fields>;
+  @com.google.gson.annotations.SerializedName <fields>;
 }
 
+# Retain generic signatures of TypeToken and its subclasses with R8 version 3.0 and higher.
+-keep,allowobfuscation,allowshrinking class com.google.gson.reflect.TypeToken
+-keep,allowobfuscation,allowshrinking class * extends com.google.gson.reflect.TypeToken
+
+##---------------End: proguard configuration for Gson  ----------

gradle.properties

@@ -18,4 +18,6 @@ android.useAndroidX=true
 # Automatically convert third-party libraries to use AndroidX
 android.enableJetifier=true
 # Kotlin code style for this project: "official" or "obsolete":
-kotlin.code.style=official
+kotlin.code.style=official
+# R8 full mode is enabled by default in AGP 8.x.
+android.enableR8.fullMode=false