添加设置语言demo

app/src/main/ets/AppAbilityStage.ets

@@ -1,8 +1,11 @@
 import { AbilityConstant, AbilityStage, Configuration, Want } from '@kit.AbilityKit';
 
-class HMDemoAbilityStage extends AbilityStage {
+const TAG = '[AbilityStage]';
+
+export default class AppAbilityStage extends AbilityStage {
 
   onCreate(): void {
+    console.log(TAG, "onCreate")
   }
 
   // onAcceptWant(want: Want): string {

app/src/main/ets/appability/AppAbility.ets

@@ -2,6 +2,8 @@ import { AbilityConstant, UIAbility, Want } from '@kit.AbilityKit';
 import { hilog } from '@kit.PerformanceAnalysisKit';
 import { window } from '@kit.ArkUI';
 
+const TAG = '[AppAbility]'
+
 export default class AppAbility extends UIAbility {
   constructor() {
     super();

app/src/main/ets/pages/Index.ets

@@ -61,7 +61,8 @@ struct Index {
       name: 'System',
       items: [
         {name: "Scheme", page: 'pages/system/SchemePage'},
-        {name: "MVVM", page: 'pages/mvvm/HomePage'}
+        {name: "MVVM", page: 'pages/mvvm/HomePage'},
+        {name: "SetLanguage", page: 'pages/system/SetLanguagePage'}
       ]
     }
   ];

app/src/main/ets/pages/system/SetLanguagePage.ets

@@ -0,0 +1,38 @@
+import { TitleBar } from '@devwiki/common_ui';
+import { i18n } from '@kit.LocalizationKit';
+
+@Entry
+@Component
+struct SetLanguagePage {
+
+  private readonly languageGroup = "languageGroup"
+  @State selectedIndex: number = 0;
+
+  build() {
+    Column() {
+      TitleBar({
+        title: $r('app.string.set_language_title')
+      });
+      Row() {
+        Text('简体中文');
+        Radio({group: this.languageGroup, value: '简体中文'}).checked(true).onChange(isChecked => {
+          if (isChecked) {
+            this.selectedIndex = 0;
+          }
+        });
+      }
+      Row() {
+        Text('英文');
+        Radio({group: this.languageGroup, value: '英文'}).checked(false).onChange(isChecked => {
+          if (isChecked) {
+            this.selectedIndex = 1;
+          }
+        });
+      }
+
+      Button('修改语言').onClick(() => {
+        i18n.System.setAppPreferredLanguage(this.selectedIndex == 0 ? 'zh-Hans' : 'en-US')
+      })
+    }.width('100%').height('100%')
+  }
+}

app/src/main/module.json5

@@ -4,6 +4,7 @@
     "type": "entry",
     "description": "$string:module_desc",
     "mainElement": "AppAbility",
+    "srcEntry": "./ets/AppAbilityStage.ets",
     "deviceTypes": [
       "phone",
       "tablet",

app/src/main/resources/base/element/string.json

@@ -11,6 +11,10 @@
     {
       "name": "AppAbility_label",
       "value": "HM4Demo"
+    },
+    {
+      "name": "set_language_title",
+      "value": "Set Language"
     }
   ]
 }

app/src/main/resources/base/profile/main_pages.json

@@ -24,6 +24,7 @@
 
     "pages/system/SchemePage",
     "pages/system/TimerPage",
+    "pages/system/SetLanguagePage",
 
     "pages/web/WebPage",
     "pages/web/WebDialogPage"

app/src/main/resources/en_US/element/string.json

@@ -11,6 +11,10 @@
     {
       "name": "AppAbility_label",
       "value": "HMDemo"
+    },
+    {
+      "name": "set_language_title",
+      "value": "Set Language"
     }
   ]
 }

app/src/main/resources/zh_CN/element/string.json

@@ -11,6 +11,10 @@
     {
       "name": "AppAbility_label",
       "value": "HMDemo"
+    },
+    {
+      "name": "set_language_title",
+      "value": "设置语言"
     }
   ]
 }