Crash on released apk

[Goooler]

2022-01-25 00:14:25.637 8875-8875/? E/AndroidRuntime: FATAL EXCEPTION: main
    Process: io.goooler.demoapp, PID: 8875
    java.lang.RuntimeException: Unable to start activity ComponentInfo{io.goooler.demoapp/io.goooler.demoapp.main.ui.MainActivity}: java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3622)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3786)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2257)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:233)
        at android.app.ActivityThread.main(ActivityThread.java:8030)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:631)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:978)
     Caused by: java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType
        at x4.c.a(SourceFile:1)
        at r4.a.onCreate(SourceFile:2)
        at io.goooler.demoapp.main.ui.MainActivity.onCreate(SourceFile:1)
        at android.app.Activity.performCreate(Activity.java:8006)
        at android.app.Activity.performCreate(Activity.java:7990)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3595)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3786) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2257) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:233) 
        at android.app.ActivityThread.main(ActivityThread.java:8030) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:631) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:978) 

MainActivity extends BaseBindingActivity with generic argument MainActivityBinding:

DemoApp/main/src/main/kotlin/io/goooler/demoapp/main/ui/MainActivity.kt

Lines 18 to 21 in cc12a2f

	@AndroidEntryPoint
	@Route(path = RouterPath.MAIN)
	class MainActivity : BaseBindingActivity<MainActivityBinding>() {

binding instantiated by inflateBinding extension in BaseBindingActivity:

DemoApp/common/src/main/kotlin/io/goooler/demoapp/common/base/binding/BaseBindingActivity.kt

Lines 8 to 19 in cc12a2f

	abstract class BaseBindingActivity<VB : ViewDataBinding> : BaseThemeActivity(), IBinding<VB> {
	override lateinit var binding: VB
	override fun onCreate(savedInstanceState: Bundle?) {
	super.onCreate(savedInstanceState)
	binding = (inflateBinding(layoutInflater) as VB).also {
	it.lifecycleOwner = this
	setContentView(it.root)
	}
	}
	}

inflateBinding generate binding by reflection:

DemoApp/common/src/main/kotlin/io/goooler/demoapp/common/util/CommonExtensions.kt

Lines 297 to 303 in cc12a2f

	fun <T : ViewBinding> LifecycleOwner.inflateBinding(inflater: LayoutInflater): T {
	return (javaClass.genericSuperclass as ParameterizedType).actualTypeArguments
	.filterIsInstance<Class<T>>()
	.first()
	.getDeclaredMethod("inflate", LayoutInflater::class.java)
	.invoke(null, inflater) as T
	}

[Goooler]

Since 856d4c3.

[Goooler]

Caused by updating AGP 7.0.0-beta01 with android.enableR8.fullMode=true enabled.
If I disable android.enableR8.fullMode=true, no crash happend.

[Goooler]

Have not been fixed in AGP 7.0.4 or 7.1.0-rc01 or AGP 7.2.0-alpha07.

[Goooler]

Decompile MainActivity with android.enableR8.fullMode=true enabled:

@Route(path = "/main/")
public final class MainActivity extends a {
  ...
}

Decompile MainActivity with android.enableR8.fullMode=true disabled:

@Route(path = "/main/")
public final class MainActivity extends a<MainActivityBinding> {
  ...
}

So r8 fullMode erase the generic type on MainActivity's super class, make javaClass.genericSuperclass as ParameterizedType throw ClassCastException, seems this behavior starts from AGP 7.0.0-beta01 and I already add -keepattributes Signature rule in proguard files.

[Goooler]

Here is the MainActivity decompiled from dex:

public final class MainActivity extends a {
  ...
}

No generic type on a class.

[Goooler]

Still showing after AGP 7.1, to solve this problem absolutely, should wait Hilt to release a new version that supports new R8 rules.

[Goooler]

After #13 & #31, solved.