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(AppLifecycleState state) async {
  switch (state) {
    case AppLifecycleState.resumed:
      if (onResumed != null)
        await onResumed!();
      break;
    case AppLifecycleState.inactive:
      if (onInactive != null)
      await onInactive!();
      break;
    case AppLifecycleState.paused:
      if (onPaused != null)
      await onPaused!();
      break;
    case AppLifecycleState.detached:
      if (onDetached != null)
      await onDetached!();
      break;
  }
}