Description

From documentation, this is how "trampoline" activity should be used for splash screens:

    override fun onCreate(savedInstanceState: Bundle?) {
        val splashScreen = installSplashScreen()
        super.onCreate(savedInstanceState)

        // Keep the splash screen visible for this Activity.
        splashScreen.setKeepOnScreenCondition { true }
        startSomeNextActivity()
        finish()
     }

But this seems to cause early crashes for some of our users. We are not able to reproduce this though.

Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.appcompat.widget.ContentFrameLayout.a(int, int, int, int)' on a null object reference
       at androidx.appcompat.app.AppCompatDelegateImpl.applyFixedSizeWindow(AppCompatDelegateImpl.java:1085)
       at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:879)
       at androidx.appcompat.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:667)
       at androidx.appcompat.app.AppCompatActivity.findViewById(AppCompatActivity.java:264)
       at androidx.core.splashscreen.SplashScreen$Impl31.setKeepOnScreenCondition(SplashScreen.kt:435)
       at androidx.core.splashscreen.SplashScreen.setKeepOnScreenCondition(SplashScreen.kt:162)
       at x.x.x.android.ui.features.splash.SplashScreenActivity.onCreate(SplashScreenActivity.java:63)
       at android.app.Activity.performCreate(Activity.java:8374)
       at android.app.Activity.performCreate(Activity.java:8353)
       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1384)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3698)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3854)
       at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
       at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
       at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2346)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loopOnce(Looper.java:201)
       at android.os.Looper.loop(Looper.java:288)
       at android.app.ActivityThread.main(ActivityThread.java:7952)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:569)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1019)

What are we doing

We are literally doing the same as described in documentation.

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        SplashScreen splashScreen = SplashScreen.installSplashScreen(this);

        super.onCreate(savedInstanceState);

        splashScreen.setKeepOnScreenCondition(() -> true);

        resolveAndStartNextActivity();
        finish();
    }

Affected devices

This issues affected ~500 users on an app, that has ~500k active users in last 90 days.

This issue happens on these android versions:

• 15 -> 1%
• 14 -> 69%
• 13 -> 30%

Where top manufacturers are:

• Samsung -> 60%
• Xiaomi -> 17%
• Oppo -> 15%

Potentially related

I've some other issues, where calling finish() immediately after setOnExitAnimationListener() is not recommended, since it can cause crashes, as suggested by multiple Google developers, for example: https://issuetracker.google.com/issues/228465776#comment2

Is this also the case for setKeepOnScreenCondition()?

Versions

• androidx.appcompat:appcompat:1.7.0
• androidx.core:core-splashscreen:1.0.1
• target/compile SDK version: 34
• AGP version: 8.7.3