Jetpack Compose Show Snackbar
November 2, 2021Assuming I try to load data from firestore, and I would show error via snackbar.
@Composable
fun JourneyApp(viewModel: MainViewModel = viewModel()) {
// snackbar setup
// allow sequential snackbar message without overwriting each other
val snackbarChannel = remember { Channel<String>(Channel.BUFFERED) }
val scaffoldState = rememberScaffoldState()
snackbarChannel.trySend("Loading Data ....")
val postsResource by viewModel.fetchPosts().collectAsState(initial = Resource.loading(null))
val posts = postsResource.data ?: emptyList()
if (postsResource.status == Status.ERROR) {
snackbarChannel.trySend(postsResource.message ?: "Error")
}
LaunchedEffect(snackbarChannel) {
snackbarChannel.receiveAsFlow().collect { message ->
scaffoldState.snackbarHostState.showSnackbar(
message = message
)
/*
when (result) {
SnackbarResult.ActionPerformed -> {
/* action has been performed */
}
SnackbarResult.Dismissed -> {
/* dismissed, no action needed */
}
}
*/
}
}
Scaffold(
scaffoldState = scaffoldState,
) { innerPadding ->
LazyColumn(modifier = Modifier.padding(innerPadding)) {
items(posts) { post ->
Text(post.title)
}
}
}
}
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