How to prevent white background when app starts up in Jetpack compose-CodePudding

I have created an app with Jetpack compose and expected the start up background is black or some other colors, not white. This is my themes.xml

<style name="Theme.AlluringScreenshot" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
    <item name="android:statusBarColor">#030318</item>
    <item name="android:windowBackground">#030318</item>
</style>

The above style works well till on Android 11 but Android 12. My app still has white background at starting up. Any suggestions for this matter?

CodePudding user response：

Use the splash screen API as a placeholder while jetpack compose is still processing

CodePudding user response：

This is the author of this question.

After spending more time diving into some documents, I have found the spot for this matter. It looks very simple than any the solutions I found. The android:windowBackground attribute only work till Android 11. This should be replaced by android:windowSplashScreenBackground to work well on Android 12.

That's all.