Flutter: how to prevent device orientation changes and force portrait?

Question

I would like to prevent my application from changing its orientation and force the layout to stick to \"portrait\".

In the main.dart, I put:

void mai         


        

Answer 1

@boeledi, If you want to “lock” the device orientation and not allow it to change as the user rotates their phone, this was easily set as below,

// This did not work as requirement
void main() {
  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
  runApp(new MyApp());
}

You have to wait until setPreferredOrientations is done and then start the app

// This will works always for lock screen Orientation.
void main() {
  WidgetsFlutterBinding.ensureInitialized();
  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp])
    .then((_) {
      runApp(new MyApp());
    });
}