Pop up menu remains opened. It should be closed.

[Navneetsinh53]

If I change orientation from portrait to landscape or vice versa, pop up menu remains opened. It should be closed.

[function1983]

This maybe?

class MyWidgetState extends State
                       with WidgetsBindingObserver {
  PopupMenu menu;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override void didChangeMetrics() {
    menu.dismiss();
  }
}