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To draw behind the system status bar in Jetpack Compose Dialog, you can use the SystemUiController API.

Here is the process:

1. In the onCreate method of your activity, create an instance of SystemUiController.

val systemUiController = rememberSystemUiController()

1. Call the setStatusBarColor method of SystemUiController and pass it a transparent color.

systemUiController.setStatusBarColor(Color.Transparent, darkIcons = true)

1. In your dialog code, use the Modifier.statusBarsPadding() modifier to add padding to your content to avoid overlapping with the system status bar.

AlertDialog(
    onDismissRequest = dismiss,
    title = { Text(text = "Title") },
    text = { Text(text = "Content") },
    confirmButton = {
        Button(
            onClick = { /* Handle confirm button click */ },
            modifier = Modifier.statusBarsPadding()
        ) {
            Text("Confirm")
        }
    },
    dismissButton = {
        Button(
            onClick = dismiss,
            modifier = Modifier.statusBarsPadding()
        ) {
            Text("Cancel")
        }
    },
)

By using Modifier.statusBarsPadding(), Jetpack Compose automatically adds padding to your dialog content, ensuring that it is not obscured by the system status bar.