Does anyone have any recommendations around presenting a Sna kotlinlang #compose

Does anyone have any recommendations around presenting a Snackbar once? Driving the UI from state is easy except when I want to present something at a particular point in time, and only once. I could create state that contains something like

showSnackbar

, but if my UI gets recomposed because of a configuration change the Snackbar will show again. Is the recommended approach to handle the timing in whatever produces state, and after a period of time output state with

showSnackbar = false

Adam Powell

01/23/2021, 1:37 AM

Check out how

SnackbarHost

handles it: https://developer.android.com/reference/kotlin/androidx/compose/material/package-summary#snackbarhost

you can present a snack using a suspend call on the state object, and it will return the user's action once they acknowledge it or it is dismissed.

SnackbarHostState

handles the state management and queuing behavior

01/23/2021, 1:50 AM

Don't give the snackbar any power. Treat it like any other UI that needs displayed. Put `showSnackbar`true (sorry FUCK slack) in your UI state, start a delayed coroutine, and then flip it to false. The same way you would show a button for 1s. Never let a UI component control it's own dismissal.

➕ 6

If you get recomposed in the middle you want the snackbar to still be displayed, just as you'd want the button.

👍 2

Adam Powell

01/23/2021, 3:12 AM

Yep. That's all

SnackbarHost

does, it just scopes that timeout and shows the current content from the state

👍 3