set orientation flutter code example

Example 1: flutter set orientation

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  // We need to call it manually,
  // because we going to call setPreferredOrientations()
  // before the runApp() call
  WidgetsFlutterBinding.ensureInitialized();
  
  // Than we setup preferred orientations,
  // and only after it finished we run our app
  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp])
      .then((value) => runApp(MyApp()));
}

Example 2: flutter lock orientation

@override
void initState(){
  super.initState();
  SystemChrome.setPreferredOrientations([
      DeviceOrientation.landscapeRight,
      DeviceOrientation.landscapeLeft,
  ]);
}

Example 3: lock screen orientation flutter

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.orientation_lock_example">    <application ...>        <activity            android:name=".MainActivity"            android:screenOrientation="portrait"            ...            />            ...         </activity>        ...     </application></manifest>