didChangeAppLifecycleState method

@override void 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
void didChangeAppLifecycleState(AppLifecycleState state) {
  // App state changed before we got the chance to initialize.
  if (widget.photoController == null || !widget.photoController!.value.isInitialized) {
    return;
  }

  if (state == AppLifecycleState.inactive) {
    // Free up memory when camera not active
    // widget.photoController!.dispose();
  } else if (state == AppLifecycleState.resumed) {
    // Reinitialize the camera with same properties
    onNewCameraSelected();
  }
}