Flutter Question posted in
The official Flutter documentation can be found here.

How to refresh screen when user comes from background after a duration in flutter

I want to implement a global widget which handles the app state.
What i want to do is suppose i am on home screen of the application and now i put the app in background.

Now lets suppose if i re – opens the app and app comes in foreground and the time difference between app background and foreground is more than 30 minutes the i want to refresh home screen.

This should happens if i implemented that global widget in any other screen , lets say cart screen.

Please help me with the code in flutter

Tags:

2

Answers


  1. 0

    Can you try checking AppLifecycleState.resumed in didChangeAppLifecycleState() ?

    @override
void didChangeAppLifecycleState(AppLifecycleState state) {
  if (state == AppLifecycleState.resumed) {
    _refreshData();
  }
}
    Login or Signup to reply.
  2. 0
    • Use WidgetsBindingObserver to notify when app state change (go background, foreground…)
    • Write data date time (to local storage) when app go to background
    • Get this data when app is back to foreground then compare
    class _HomeScreenState extends State<HomeScreenState> with WidgetsBindingObserver {
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this); // <--------
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this); // <--------
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    // check when app go foreground
    if (state == AppLifecycleState.resumed) {
      final lastTimeGoBackground = getLastTimeGoBackgroundFromLocalStorage();
      final now = DateTime.now();
      if (now.isAfter(lastTimeGoBackground) && now.difference(lastTimeGoBackground).inMinutes >= 30) {
        // do your stuff here
      }
    }

    // write data date time when app go background
    if (state == AppLifecycleState.paused) {
      final now = DateTime.now();
      setLastTimeGoBackgroundFromLocalStorage(now);
    }
  }
}
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search