didChangeAppLifecycleState method

@override Future<Null> didChangeAppLifecycleState(AppLifecycleState state)

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
Future<Null> didChangeAppLifecycleState(state) async {
  switch (state) {
    case AppLifecycleState.resumed:
      await onResumed();
      break;
    case AppLifecycleState.inactive:
      await onInactive();
      break;
    case AppLifecycleState.paused:
      await onPaused();
      break;
    case AppLifecycleState.detached:
      await onDetached();
      break;
    case AppLifecycleState.hidden:
      // TODO: Handle this case.
      break;
  }
}