Android 12 splash white background

Question

I was trying to add support to the Android 12 splash screen. Here's my v31/styles.xml

<resources>

<style name="SplashTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:statusBarColor">@android:color/transparent</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:navigationBarColor">@android:color/transparent</item>
    <item name="android:windowSplashScreenAnimatedIcon">@drawable/ic_launcher_foreground</item>
    <item name="android:windowSplashScreenIconBackgroundColor">#FF3044</item>
    <item name="android:windowSplashScreenBackground">#FF3044</item>
</style>

</resources>

I am able to see a white screen after the new splash. That white screen is the android:windowBackground but if I tried to set it as @null, I am getting inverted splash at the place of the white screen. How to remove that white background after the splash? Splash API was designed to replace windowBackground I guess.

App flow -> SplashActivity (with the mentioned theme) and then I pause the preDraw method using a ViewModel then navigate to another activity.

SplashActivity.kt - onCreate()

val content: View = findViewById(android.R.id.content)
    content.viewTreeObserver.addOnPreDrawListener(
        object : ViewTreeObserver.OnPreDrawListener {
            override fun onPreDraw(): Boolean {
                return if (viewModel.appInit()) {
                    navigateToHome()
                    content.viewTreeObserver.removeOnPreDrawListener(this)
                    true
                } else {
                    false
                }
            }
        }
    )

HomeActivity doesn't have any theme. When I add <item name="android:windowBackground">@color/android:black</item> in the Splash's theme, instead of the white screen, I'm getting the black one.

Answer 1

The issue is that you are returning true and removing the OnPreDrawListener after requesting the navigation to your other activity, which indicates to the system that your current Activity is now ready to draw, but the next one is not yet visible, hence the flash you're seeing.

Simply always return false in the predraw listener and remove it in onStop()