didChangeAppLifecycleState method

  1. @override
void didChangeAppLifecycleState(
  1. AppLifecycleState state
)
override

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:

Implementation

@override
void didChangeAppLifecycleState(AppLifecycleState state) {
  final CameraController? c = innerController;
  if (state == AppLifecycleState.resumed) {
    initCameras(currentCamera);
  } else if (c == null || !c.value.isInitialized) {
    // App state changed before we got the chance to initialize.
    return;
  } else if (state == AppLifecycleState.inactive) {
    c.dispose();
    innerController = null;
  }
}