I'm currently developing an AndroidTV application using Jetpack Compose, Retrofit, and Coroutines. To test the performance issues in my project, I need to enable R8 mode. However, when I do so, I encounter the following error:
Fatal Exception: java.lang.ClassCastException:
at com.xx.xx.domain.home.usecase.XxxXUseCase$invoke$2.invokeSuspend(XxxXUseCase.kt:24)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7898)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
or (with obfuscation):
Fatal Exception: java.lang.ClassCastException:
at a.d.s(:5)
at u6.a.h(SourceFile:81)
at ic.a.t(SourceFile:9)
at yc.e0.run(SourceFile:116)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7898)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
Here's my configuration:
- Jetpack Compose version: "1.6.0-SNAPSHOT" (required for tv apis)
- Kotlin(Coroutines) version: "1.8.22" (I need to use versions below version 1.9.0 for Hilt For Hilt)
- Android Studio version: "Android Studio Giraffe | 2022.3.1"
- Gradle version: 'com.android.tools.build:gradle:8.1.0'
My "build.gradle" file
release {
minifyEnabled true
firebaseCrashlytics {
mappingFileUploadEnabled true
}
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),
'proguard-rules.pro'
signingConfig signingConfigs.debug
}
My "proguard-rules.pro" file:
-keepattributes Signature
# Retrofit
-keep,allowobfuscation,allowshrinking interface retrofit2.Call
-keep,allowobfuscation,allowshrinking class retrofit2.Response
-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
# Kotlin Coroutines
-dontwarn kotlin.**
-dontwarn kotlinx.atomicfu.**
-keepnames class kotlinx.coroutines.internal.MainDispatcherFactory {}
-keepnames class kotlinx.coroutines.CoroutineExceptionHandler {}
-keepnames class kotlin.ResultKt {}
-keepclassmembernames class kotlinx.** {
volatile <fields>;
}
I've tried to look into the documentation and search online for this specific error but couldn't find any relevant solutions. After some research, I also added the following code, but it didn't work:
-keepnames class kotlin.ResultKt {}
Has anyone faced this issue before, and how can I resolve it?
Additionally, it's worth mentioning that the application does not crash in debug mode or when "minifyEnabled" is set to false.
Any help would be appreciated. Thank you!
