How to Lock Screen Orientation in Flutter

Wed, 17 Jun 2026 13:30:00 -0300

Many developers who want to lock screen orientation in Flutter go straight to AndroidManifest.xml and add android:screenOrientation="portrait". That works, but there’s a better way.

The Dart approach: `SystemChrome`

Add the import and configure the orientations at the beginning of main(), before calling runApp:

import 'package:flutter/services.dart'; // ← required import

void main() {
 WidgetsFlutterBinding.ensureInitialized(); // needed before any system call
 SystemChrome.setPreferredOrientations([
 DeviceOrientation.portraitUp,
 DeviceOrientation.portraitDown,
 ]);
 runApp(const MyApp());
}

WidgetsFlutterBinding.ensureInitialized() is required to make sure Flutter is ready before any system call. Without it, setPreferredOrientations may not work correctly.

SystemChrome on thomazrb

How to Lock Screen Orientation in Flutter

The Dart approach: SystemChrome

The Dart approach: `SystemChrome`