Balloon Causes Black Screen During Splash Screen in Compose

[cgaisl]

Including a Balloon in a Jetpack Compose UI hierarchy in MainActivity causes the splash screen (via AndroidX SplashScreen API) to display as a black screen while setKeepOnScreenCondition is true.

Expected Behavior:

• After the initial splash screen (white background with an icon), the splash screen stays on for 2 more seconds.
• After 2 seconds, the main UI appears.

Actual Behaviour:

• After the initial splash screen, the app turns black
• After 2 seconds, the main UI appears

Minimal example:

res/values/themes.xml

<resources>
    <style name="Theme.App.Starting" parent="Theme.SplashScreen">
        <item name="windowSplashScreenBackground">@android:color/white</item>
        <item name="windowSplashScreenAnimatedIcon">@drawable/ic_launcher_background</item>
        <item name="postSplashScreenTheme">@style/ActualTheme</item>
    </style>

    <style name="ActualTheme">
        <item name="android:windowBackground">@android:color/white</item>
    </style>
</resources>

manifest

<activity
    android:name=".MainActivity"
    android:theme="@style/Theme.App.Starting">

MainActivity.kt

class MainActivity : ComponentActivity() {
    private var isDataLoaded = false

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

        splashScreen.setKeepOnScreenCondition { !isDataLoaded }

        setContent {
            Log.d("MainActivity", "setContent")

            val balloon = rememberBalloonBuilder { }

            Box(
                modifier = Modifier.fillMaxSize()
            ) {
                Balloon(
                    builder = balloon,
                    balloonContent = {
                        Text("Balloon Content")
                    },
                ) {
                    Text("Hello, World")
                }
            }
        }

        lifecycleScope.launch {
            delay(2000)
            isDataLoaded = true
            Log.d("MainActivity", "data is loaded")
        }
    }
}