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 (state == AppLifecycleState.resumed) {
    setState(() => onScreen = true);
  } else {
    if (_asyncInitOnce != null && onScreen) {
      FlutterQrReader.stop();
    }
    setState(() {
      onScreen = false;
      _asyncInitOnce = null;
    });
  }
}