flutter_localization_tut

.\lib\main.dart

import 'package:flutter/material.dart';
import 'localizations.dart'; //import your localizations.dart
import 'package:flutter_localizations/flutter_localizations.dart'; //import this

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      onGenerateTitle: (BuildContext context) =>
          AppLocalizations.of(context).title(),
      localizationsDelegates: [
        const AppLocalizationsDelegate(),
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
      ],
      supportedLocales: [
        const Locale('en', ''),
        const Locale('de', ''),
        const Locale('ru', ''),
      ],
      //...
    );
  }
}
//...
class _MyHomePageState extends State<MyHomePage> {
  //...
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(AppLocalizations.of(context).title()), //change this
      ),
      //...
          children: <Widget>[
            Text(AppLocalizations.of(context).text(_counter)), //add this
          ],
        //...
    );
  }
}