Content padding parameter it is not used

user_8331157 0
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I recently started working with Jetpack Compose. I've got the following composable:

@Composable
fun SearchScreen(navController: NavHostController) {
    Scaffold(
        topBar = { SearchBar() },
        content = {
            Column(modifier = Modifier
                .fillMaxSize()
                .verticalScroll(rememberScrollState())) {
                Text(stringResource(id = R.string.genreFilter))
                Row(
                    modifier = Modifier
                        .horizontalScroll(rememberScrollState()),
                    horizontalArrangement = Arrangement.spacedBy(4.dp)
                ) {
                    // some nested Composables
                }

            }},
    )
}

But with this code as-is, the whole code within content = {...} is being underlined in red saying Jetpack Compose: Content padding parameter it is not used. I already read in this Stackoverflow Post that actually, PaddingValues only are provided in a Scaffold if the bottomBar is set, which obviously is not the case here. So I do not understand why I am getting this error.

Note: The app actually does use a BottomNavigation, but not within the Composable that I showed above. Can it be that this is still somehow propagated here?

android-jetpack-compose android
2 Answers

Since Compose 1.2.0 it's required to use padding parameter, passed into Scaffold content composable. You should apply it to the topmost container/view in content:

content = { padding ->
    Column(
        modifier = Modifier
            .padding(padding)
    // ...

This is done to prevent layout problems, for example, when the scaffold has a bottom bar, without the use of this padding part of your view will be under the bar.

You can always suppress it with @SuppressLint("UnusedMaterialScaffoldPaddingParameter"), but I would recommend doing this only when you know exactly what you are doing.

user_35857960

I seen a bug in version alpha and I was using SmallTopAppBar() Scaffold didn't provide paddings to two composables was on top of each other. After updating it, just realized the bug fixed and Scaffold has itself a padding so composables is not on top of rach other anymore.

Usage:

  Scaffold(topBar = { AppBar() }) { paddingValues ->
  AnyComposable(modifier = Modifier.padding(paddingValues)){

  }
user_86828510
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