add localization

lib/config/RouterConfig.dart

@@ -21,6 +21,7 @@ import 'package:flutter_starter_notes/ui/ImageAndIconAbout.dart';
 import 'package:flutter_starter_notes/ui/InheritedWidgetAbout.dart';
 import 'package:flutter_starter_notes/ui/InputAndFormAbout.dart';
 import 'package:flutter_starter_notes/ui/ListViewAbout.dart';
+import 'package:flutter_starter_notes/ui/LocalizationAbout.dart';
 import 'package:flutter_starter_notes/ui/MaterialContainerAbout.dart';
 import 'package:flutter_starter_notes/ui/NotificationAbout.dart';
 import 'package:flutter_starter_notes/ui/PaddingAbout.dart';
@@ -54,6 +55,7 @@ class RouterConfig {
     "custom": "自定义 Widgets",
     "fileAndHttp": "文件操作与网络请求",
     "packageAndPlugin": "包与插件",
+    "localization": "国际化",
   };
 
   static List<RouterBean> allRoutes = [
@@ -391,6 +393,14 @@ class RouterConfig {
             title: "插件开发",
           ),
     ),
+    RouterBean(
+      "/localizationabout",
+      "实现Localizations",
+      "localization",
+      (context) => LocalizationAbout(
+            title: "实现Localizations",
+          ),
+    ),
   ];
 
   static Map<String, WidgetBuilder> genRouters() {

lib/main.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:flutter_starter_notes/config/RouterConfig.dart';
+import 'package:flutter_starter_notes/ui/LocalizationAbout.dart';
 
 void main() {
   debugPaintSizeEnabled = false; //打开视觉调试开关
@@ -21,6 +23,18 @@ class MyApp extends StatelessWidget {
       ),
       initialRoute: '/',
       routes: RouterConfig.genRouters(),
+      // Material 和 widgets 支持多语言
+      localizationsDelegates: [
+        GlobalMaterialLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+        // 注册我们的Delegate
+        DemoLocalizationsDelegate()
+      ],
+      supportedLocales: [
+        const Locale("en", "US"),
+        const Locale("zh", "CN"),
+      ],
+      //locale: const Locale('en', 'US'), //手动指定 locale
     );
   }
 }

lib/ui/LocalizationAbout.dart

@@ -0,0 +1,70 @@
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_starter_notes/component/CommonTitle.dart';
+
+class LocalizationAbout extends StatelessWidget {
+  LocalizationAbout({Key key, this.title});
+
+  final String title;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: SingleChildScrollView(
+        child: Column(
+          children: <Widget>[
+            CommonTitle('自定义多语言实现-切换系统语言回来试试'),
+            Container(
+              padding: EdgeInsets.all(16),
+              child: Text(DemoLocalizations.of(context).testDesc),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+//Locale资源类
+class DemoLocalizations {
+  DemoLocalizations(this.isZh);
+
+  //是否为中文
+  bool isZh = false;
+
+  //为了使用方便，我们定义一个静态方法
+  static DemoLocalizations of(BuildContext context) {
+    return Localizations.of<DemoLocalizations>(context, DemoLocalizations);
+  }
+
+  //Locale相关值，title为应用标题
+  String get testDesc {
+    return isZh ? "我是中文" : "I am English";
+  }
+//... 其它的值
+}
+
+//Locale代理类
+class DemoLocalizationsDelegate
+    extends LocalizationsDelegate<DemoLocalizations> {
+  const DemoLocalizationsDelegate();
+
+  //是否支持某个Local
+  @override
+  bool isSupported(Locale locale) => ['en', 'zh'].contains(locale.languageCode);
+
+  // Flutter会调用此类加载相应的Locale资源类
+  @override
+  Future<DemoLocalizations> load(Locale locale) {
+    return SynchronousFuture<DemoLocalizations>(
+        DemoLocalizations(locale.languageCode == "zh"));
+  }
+
+  @override
+  bool shouldReload(DemoLocalizationsDelegate old) => false;
+}

pubspec.yaml

@@ -15,6 +15,8 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  flutter_localizations:
+    sdk: flutter
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.