Brief, transient messages with an optional action
A Snackbar shows a short, low-priority message at the bottom of the screen. Host it with a SnackbarHost bound to a SnackbarHostState, then call showSnackbar from a coroutine. An action label lets people respond, and the returned result tells you whether they tapped it.
Launch showSnackbar from a coroutine scope tied to the composition.
val hostState = remember { SnackbarHostState() }
val scope = rememberCoroutineScope()
Box {
Button(onClick = {
scope.launch { hostState.showSnackbar("Message sent") }
}) { Text("Send") }
SnackbarHost(hostState, Modifier.align(Alignment.BottomCenter))
}Read the SnackbarResult to know whether the action was tapped.
scope.launch {
val result = hostState.showSnackbar(
message = "Item deleted",
actionLabel = "Undo"
)
if (result == SnackbarResult.ActionPerformed) {
// restore the item
}
}