SimpleSnackbar.kt

setContent{
    val showSnackbar = remember{ mutableStateOf(false)}

    Column{
        Button(
            onClick = {
                showSnackbar.value = true
            }
        ) {
            Text("Show snackbar")
        }
        SimpleSnackbarDemo(
            show = showSnackbar.value,
            onHideSnackbar = {
                showSnackbar.value = false
            }
        )
    }
}


@Composable
fun SnackbarDemo(
    show: Boolean,
    onHideSnackbar: () -> Unit,
){
    ConstraintLayout(
        modifier = Modifier.fillMaxSize()
    ) {
        val snackbar = createRef()
        if(show){
            Snackbar(
                modifier = Modifier.constrainAs(snackbar) {
                    bottom.linkTo(parent.bottom)
                    start.linkTo(parent.start)
                    end.linkTo(parent.end)
                },
                action = {
                    Text(
                        "Hide",
                        modifier = Modifier.clickable(onClick = onHideSnackbar),
                        style = MaterialTheme.typography.h5
                    )
                },
            ) {
                Text(text = "Hey look a snackbar")
            }
        }
    }
}