Device orientation in flutter - flutter

Question

How to develop app for both device orientation(portrait and landscape) in flutter. When I rotate my device in landscape, app size will adjust on landscape. If I rotate my device in portrait, app size will adjust on portrait.

Answer 1

The answer is simple called as "responsive design", please have a look to one of the best post about the same subject ;
https://medium.com/flutter-community/developing-for-multiple-screen-sizes-and-orientations-in-flutter-fragments-in-flutter-a4c51b849434
and also from the original source from Flutter documentation ;
https://flutter.dev/docs/development/ui/layout/responsive
Hope this works

Answer 2

you can develop two widgets for each orientation each one has different sizes of text, padding.... using MediaQuery.of(context).orientation to get the current orientation or you can use Layout Builder.
Otherwise, you can lock your app to a specific orientation:
import 'package:flutter/services.dart';
main() {
WidgetsFlutterBinding.ensureInitialized();
SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
runApp(MyHomePage());
}