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) {
  if (!(controller.cameraController?.value.isInitialized == true)) {
    return;
  }
  if (state == AppLifecycleState.inactive && !_isControllerDisposed) {
    postFrame(() {
      _isControllerDisposed = true;
      initialized = false;
      controller.state.removeListener(_onStateListener);
      controller.dispose();
    });
  } else if (state == AppLifecycleState.resumed) {
    _initController();
  }
  super.didChangeAppLifecycleState(state);
}