Продолжаю разбираться с локализацией

lib/main.dart

@@ -3,29 +3,22 @@ import 'splash.dart';
 import 'consts.dart';
 import 'strings.dart';
 import 'dart:async';
-import 'i18n/messages_all.dart';
-import 'package:intl/intl.dart';
-
-Future<LocaleQueryData> _onLocaleChanged(Locale locale) async {
-  final String localeString = locale.toString();
-  await initializeMessages(localeString);
-  Intl.defaultLocale = localeString;
-  return Strings.instance;
-}
 
 /// Точка входа в приложение.
 void main() {
   runApp(new Checker());
 }
 
-class Checker extends StatelessWidget {
+class Checker extends StatefulWidget {
+  @override CheckerState createState() => new CheckerState();
+}
+
+class CheckerState extends State<Checker> {
+
   @override Widget build(BuildContext context) {
-    return new MaterialApp(title: appName,
-      home: new SplashScreen(),
-      onLocaleChanged: _onLocaleChanged,
-      theme: new ThemeData(
-        primaryColor: primaryColor,
-        accentColor: primaryColor
-      ));
+    return new MaterialApp(
+      title: appName,
+      home: new SplashScreen()
+    );
   }
 }