Intermittent issue on the lock screen (a special s...

# compose

[sk eat]

Intermittent issue on the lock screen (a special surface where background/foreground states frequently change) where a Fragment is created but not rendered when using Compose.

[sk eat]

Hello, everyone!

I am currently experiencing an issue where the advertisement banner is not displaying correctly on the lock screen and would like to seek your assistance.

Problem Description
• Issue: The advertisement banner is not visible on the lock screen.
• Symptoms: The SampleAdBanner composable is invoked, and an instance of SampleAdFragment is created with advertisement-related events being tracked. However, the ad is not displayed on the actual screen. (It is suspected that the visibility is set to INVISIBLE or it is not being rendered.)
• Additional Information: SampleAdFragment works correctly in an XML environment.
Implementation Details

• Ad Banner Implementation: The ad banner is implemented using a Fragment and is bound through the SampleAdBanner composable in a Compose environment using AndroidViewBinding.
• Lock Screen Characteristics: The activity frequently toggles between background and foreground states. A service detects the screen off event to create the activity in the background.
• Key Composables Used:
◦ `SampleLockScreen`: Composes the entire lock screen UI.
◦ `SampleLockScreenScaffold`: A swipeable scaffold layout.
◦ `SampleAdBanner`: A composable for integrating the ad banner using a Fragment.
Key Code Snippets

@Composable
fun SampleLockScreen() {
    Box(modifier = Modifier.fillMaxSize()) {
        SampleContent() // This is visible
        SampleAdBanner() // However, this is not visible
    }
}

@Composable
fun SampleAdBanner(modifier: Modifier = Modifier) {
    val fragmentHolder = remember { mutableStateOf<SampleAdFragment?>(null) }
    val context = LocalContext.current
    val lifecycleOwner = LocalLifecycleOwner.current

    AndroidViewBinding(
        modifier = modifier,
        factory = SampleFragmentContainerBinding::inflate,
    ) {
        fragmentHolder.value = fragmentContainerView.getFragment<SampleAdFragment>()
    }
}

class SampleAdFragment : Fragment(R.layout.fragment_sample_ad) {
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        // can't see it, but the events here are aggregated.
    }
}

Current Hypotheses
• Modifier Configuration Issue: The size or position of the ad banner might not be set appropriately, causing it not to appear on the screen.
• Compatibility Issue Between Compose and Fragment: There may be issues rendering the UI tree correctly when integrating the Fragment through AndroidViewBinding.
Question
Is it possible that the Fragment is created but the view is not rendering during the binding process? If so, is there a way to reproduce this issue?