IssueTracker

Version used:
Pixel 7 Pro/Android 13

I've encountered a behavior inconsistency on my Pixel 7 Pro when using WindowInsetsControllerCompat to adjust the behavior of system bars. It seems there's a conflict between systemBarsBehavior and setDecorFitsSystemWindows.

I utilized the following code to customize my window behavior:

'''
WindowInsetsControllerCompat(window, window.decorView).apply {
    hide(WindowInsetsCompat.Type.systemBars())
    systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
}
WindowCompat.setDecorFitsSystemWindows(window, false)
'''


After setting the systemBarsBehavior, it seems to override or conflict with the behavior of setDecorFitsSystemWindows. Even when delaying the application of setDecorFitsSystemWindows, its behavior doesn't manifest as expected.

Interestingly, the setDecorFitsSystemWindows setting only seems to work when systemBarsBehavior is set to WindowInsetsControllerCompat.BEHAVIOR_DEFAULT. This then allows for the expected behavior when swiping from the edge to bring up the system bars.

Additional Information:

This peculiar behavior is not replicated on an Android 13 emulator, which leads me to believe it may be specific to the Pixel 7 Pro or its particular Android version.
Hoping this issue can be investigated and addressed accordingly. Many thanks in advance!

full code for test

'''
@Composable
fun FullScreenTest() {
    val window = (LocalContext.current as Activity).window
    var boxSize by remember { mutableStateOf(IntSize.Zero) }
    Box(
        modifier = Modifier
            .fillMaxSize()
            .background(Color.LightGray)
            .onGloballyPositioned { coordinates ->
                val newSize = coordinates.size
                if (boxSize != newSize) {
                    boxSize = newSize
                }
            }
    ) {
        Column(
            verticalArrangement = Arrangement.spacedBy(16.dp),
            modifier = Modifier.padding(16.dp)
        ) {
            Bar.values().forEach {
                ElevatedButton(onClick = {
                    WindowInsetsControllerCompat(window, window.decorView).apply {
                        systemBarsBehavior = it.behavior
                    }
                    WindowCompat.setDecorFitsSystemWindows(window, false)
                }) {
                    Text(text = it.text)
                }
            }
        }
        Text(
            text = "Size = $boxSize", fontSize = 20.sp, modifier = Modifier
                .align(Alignment.BottomCenter)
                .padding(16.dp)
        )

        ElevatedButton(onClick = {
            WindowInsetsControllerCompat(
                window,
                window.decorView
            ).hide(WindowInsetsCompat.Type.systemBars()) },
            modifier = Modifier.align(Alignment.BottomCenter).padding(vertical = 50.dp)) {
            Text("hide system bar")
        }
    }

    LaunchedEffect(Unit) {
        WindowInsetsControllerCompat(window, window.decorView).apply {
            hide(WindowInsetsCompat.Type.systemBars())
            systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
        }
        WindowCompat.setDecorFitsSystemWindows(window, false)
    }
}

enum class Bar(val behavior: Int, val text: String) {
    BEHAVIOR_DEFAULT_NO_FITS_SYSTEM_WINDOWS(
        WindowInsetsControllerCompat.BEHAVIOR_DEFAULT,
        "behavior default"
    ),
    BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE_NO_FITS_SYSTEM_WINDOWS(
        WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE,
        "behavior show transient bars by swipe"
    )
}
'''