didChangeAppLifecycleState method
Called when the system puts the app in the background or returns the app to the foreground.
An example of implementing this method is provided in the class-level documentation for the WidgetsBindingObserver class.
This method exposes notifications from SystemChannels.lifecycle.
See also:
- AppLifecycleListener, an alternative API for responding to application lifecycle changes.
Implementation
@override
void didChangeAppLifecycleState(AppLifecycleState state) async {
super.didChangeAppLifecycleState(state);
await FlutterAppBadger.removeBadge();
switch (state) {
case AppLifecycleState.resumed:
await _chatController.setUserState(true);
break;
case AppLifecycleState.inactive:
case AppLifecycleState.detached:
case AppLifecycleState.paused:
await _chatController.setUserState(false);
}
}