init

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

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+import { AbilityConstant, UIAbility, Want } from '@kit.AbilityKit';
+import { hilog } from '@kit.PerformanceAnalysisKit';
+import { window } from '@kit.ArkUI';
+
+export default class AppAbility extends UIAbility {
+  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
+    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
+  }
+
+  onDestroy(): void {
+    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onDestroy');
+  }
+
+  onWindowStageCreate(windowStage: window.WindowStage): void {
+    // Main window is created, set main page for this ability
+    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');
+
+    windowStage.loadContent('pages/Index', (err, data) => {
+      if (err.code) {
+        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
+        return;
+      }
+      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? '');
+    });
+  }
+
+  onWindowStageDestroy(): void {
+    // Main window is destroyed, release UI related resources
+    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');
+  }
+
+  onForeground(): void {
+    // Ability has brought to foreground
+    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');
+  }
+
+  onBackground(): void {
+    // Ability has back to background
+    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onBackground');
+  }
+}

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

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+@Entry
+@Component
+struct Index {
+  @State message: string = 'Hello World';
+
+  build() {
+    Row() {
+      Column() {
+        Text(this.message)
+          .fontSize(50)
+          .fontWeight(FontWeight.Bold)
+      }
+      .width('100%')
+    }
+    .height('100%')
+  }
+}

app/src/main/module.json5

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+{
+  "module": {
+    "name": "app",
+    "type": "entry",
+    "description": "$string:module_desc",
+    "mainElement": "AppAbility",
+    "deviceTypes": [
+      "phone",
+      "tablet",
+      "2in1"
+    ],
+    "deliveryWithInstall": true,
+    "installationFree": false,
+    "pages": "$profile:main_pages",
+    "abilities": [
+      {
+        "name": "AppAbility",
+        "srcEntry": "./ets/appability/AppAbility.ets",
+        "description": "$string:AppAbility_desc",
+        "icon": "$media:icon",
+        "label": "$string:AppAbility_label",
+        "startWindowIcon": "$media:startIcon",
+        "startWindowBackground": "$color:start_window_background",
+        "exported": true,
+        "skills": [
+          {
+            "entities": [
+              "entity.system.home"
+            ],
+            "actions": [
+              "action.system.home"
+            ]
+          }
+        ]
+      }
+    ]
+  }
+}

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

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+{
+  "color": [
+    {
+      "name": "start_window_background",
+      "value": "#FFFFFF"
+    }
+  ]
+}

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

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+{
+  "string": [
+    {
+      "name": "module_desc",
+      "value": "module description"
+    },
+    {
+      "name": "AppAbility_desc",
+      "value": "description"
+    },
+    {
+      "name": "AppAbility_label",
+      "value": "label"
+    }
+  ]
+}

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

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+{
+  "src": [
+    "pages/Index"
+  ]
+}

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

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+{
+  "string": [
+    {
+      "name": "module_desc",
+      "value": "module description"
+    },
+    {
+      "name": "AppAbility_desc",
+      "value": "description"
+    },
+    {
+      "name": "AppAbility_label",
+      "value": "label"
+    }
+  ]
+}

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

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+{
+  "string": [
+    {
+      "name": "module_desc",
+      "value": "模块描述"
+    },
+    {
+      "name": "AppAbility_desc",
+      "value": "description"
+    },
+    {
+      "name": "AppAbility_label",
+      "value": "label"
+    }
+  ]
+}