示例代码ArkTs 适配

Signed-off-by: NLiRui <lirui.WX1229126@huawei.com>

zh-cn/application-dev/database/data-persistence-by-preferences.md

@@ -58,11 +58,13 @@
      
    ```js
    import UIAbility from '@ohos.app.ability.UIAbility';
+   import { BusinessError } from '@ohos.base';
+   import window from '@ohos.window';
    
    class EntryAbility extends UIAbility {
-     onWindowStageCreate(windowStage) {
+     onWindowStageCreate(windowStage: window.WindowStage) {
        try {
-         dataPreferences.getPreferences(this.context, 'mystore', (err, preferences) => {
+         dataPreferences.getPreferences(this.context, 'myStore', (err: BusinessError, preferences: dataPreferences.Preferences) => {
            if (err) {
              console.error(`Failed to get preferences. Code:${err.code},message:${err.message}`);
              return;
@@ -82,12 +84,13 @@
      
    ```js
    import featureAbility from '@ohos.ability.featureAbility';
+   import { BusinessError } from '@ohos.base';
    
    // 获取context
    let context = featureAbility.getContext();
    
    try {
-     dataPreferences.getPreferences(context, 'mystore', (err, preferences) => {
+     dataPreferences.getPreferences(this.context, 'myStore', (err: BusinessError, preferences: dataPreferences.Preferences) => {
        if (err) {
          console.error(`Failed to get preferences. Code:${err.code},message:${err.message}`);
          return;
@@ -157,7 +160,7 @@
      
    ```js
    try {
-     preferences.flush((err) => {
+     preferences.flush((err: BusinessError) => {
        if (err) {
          console.error(`Failed to flush. Code:${err.code}, message:${err.message}`);
          return;
@@ -174,18 +177,20 @@
      应用订阅数据变更需要指定observer作为回调方法。订阅的Key值发生变更后，当执行flush()方法时，observer被触发回调。示例代码如下所示：
      
    ```js
-   let observer = function (key) {
-     console.info('The key' + key + 'changed.');
+   interface observer {
+      key: string
    }
-   preferences.on('change', observer);
+   preferences.on('change', (key: observer) => {
+     console.info('The key' + key + 'changed.');
+   });
    // 数据产生变更，由'auto'变为'manual'
-   preferences.put('startup', 'manual', (err) => {
+   preferences.put('startup', 'manual', (err: BusinessError) => {
      if (err) {
        console.error(`Failed to put the value of 'startup'. Code:${err.code},message:${err.message}`);
        return;
      }
      console.info("Succeeded in putting the value of 'startup'.");
-     preferences.flush((err) => {
+     preferences.flush((err: BusinessError) => {
        if (err) {
          console.error(`Failed to flush. Code:${err.code}, message:${err.message}`);
          return;
@@ -210,7 +215,7 @@
      
    ```js
    try {
-     dataPreferences.deletePreferences(this.context, 'mystore', (err, val) => {
+     dataPreferences.deletePreferences(this.context, 'myStore', (err: BusinessError) => {
        if (err) {
          console.error(`Failed to delete preferences. Code:${err.code}, message:${err.message}`);
          return;

zh-cn/application-dev/database/data-sync-of-distributed-data-object.md

@@ -151,17 +151,26 @@
    // 导入模块
    import distributedDataObject from '@ohos.data.distributedDataObject';
    import UIAbility from '@ohos.app.ability.UIAbility';
-   
+   import { BusinessError } from '@ohos.base';
+   import window from '@ohos.window';
+
+   interface sourceObject{
+     name: string,
+     age: number,
+     isVis: boolean
+     parent: { [key: string]: string },
+     list: { [key: string]: string }[]
+   }
    class EntryAbility extends UIAbility {
-     onWindowStageCreate(windowStage) {
-       // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-       let localObject = distributedDataObject.create(this.context, {
+     onWindowStageCreate(windowStage: window.WindowStage) {
+       let source: sourceObject = {
          name: 'jack',
          age: 18,
          isVis: false,
          parent: { mother: 'jack mom', father: 'jack Dad' },
          list: [{ mother: 'jack mom' }, { father: 'jack Dad' }]
-       });
+       }
+       let localObject: distributedDataObject.DataObject = distributedDataObject.create(this.context, source);
      }
    }
    ```
@@ -175,34 +184,43 @@
    import featureAbility from '@ohos.ability.featureAbility';
    // 获取context
    let context = featureAbility.getContext();
-   // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-   let localObject = distributedDataObject.create(context, {
+   interface sourceObject{
+     name: string,
+     age: number,
+     isVis: boolean
+     parent: { [key: string]: string },
+     list: { [key: string]: string }[]
+   }
+   let source: sourceObject = {
      name: 'jack',
      age: 18,
      isVis: false,
      parent: { mother: 'jack mom', father: 'jack Dad' },
      list: [{ mother: 'jack mom' }, { father: 'jack Dad' }]
-   });
+   }
+   // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
+   let localObject: distributedDataObject.DataObject = distributedDataObject.create(context, source);
    ```
 
 4. 加入同步组网。同步组网中的数据对象分为发起方和被拉起方。
      
    ```js
    // 设备1加入sessionId
-   let sessionId = '123456';
+   let sessionId: string = '123456';
    
    localObject.setSessionId(sessionId);
    
    // 和设备1协同的设备2加入同一个session
    
    // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-   let remoteObject = distributedDataObject.create(this.context, {
+   let remoteSource: sourceObject = {
      name: undefined,
      age: undefined, //  undefined表示数据来自对端
      isVis: true,
      parent: undefined,
      list: undefined
-   });
+   }
+   let remoteObject: distributedDataObject.DataObject = distributedDataObject.create(this.context, remoteSource);
    // 收到status上线后remoteObject同步数据，即name变成jack,age是18
    remoteObject.setSessionId(sessionId);
    ```
@@ -210,18 +228,19 @@
 5. 监听对象数据变更。可监听对端数据的变更，以callback作为变更回调实例。
      
    ```js
-   function changeCallback(sessionId, changeData) {
-     console.info(`change: ${sessionId}`);
+   interface ChangeCallback {
+     sessionId: string,
+     fields: Array<string> 
+   }
    
-     if (changeData !== null && changeData !== undefined) {
-       changeData.forEach(element => {
-         console.info(`The element ${localObject[element]} changed.`);
-       });
+   localObject.on("change", (changeData:ChangeCallback) => {
+     console.info("change" + changeData.sessionId);
+     if (changeData.fields != null && changeData.fields != undefined) {
+       for (let index: number = 0; index < changeData.fields.length; index++) {
+         console.info(`The element ${localObject[changeData.fields[index]]} changed.`);
        }
      }
-   
-   // 发起方要在changeCallback里刷新界面，则需要将正确的this绑定给changeCallback
-   localObject.on("change", this.changeCallback.bind(this));
+   });
    ```
 
 6. 修改对象属性，对象属性支持基本类型（数字类型、布尔类型、字符串类型）以及复杂类型（数组、基本类型嵌套等）。
@@ -256,7 +275,14 @@
      
    ```js
    // 删除变更回调changeCallback
-   localObject.off('change', this.changeCallback);
+   localObject.off('change',(changeData: ChangeCallback) => {
+     console.info("change" + changeData.sessionId);
+     if (changeData.fields != null && changeData.fields != undefined) {
+       for (let index: number = 0; index < changeData.fields.length; index++) {
+         console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+       }
+     }
+   });
    // 删除所有的变更回调
    localObject.off('change'); 
    ```
@@ -264,27 +290,32 @@
 9. 监听分布式数据对象的上下线。可以监听对端分布式数据对象的上下线。
      
    ```js
-   function statusCallback(sessionId, networkId, status) {
-     // 业务处理
+   interface onStatusCallback {
+     sessionId: string,
+     networkId: string,
+     status: 'online' | 'offline'
    }
    
-   localObject.on('status', this.statusCallback);
+   localObject.on('status', (statusCallback: onStatusCallback) => {
+     console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " +  statusCallback.networkId);
+     // 业务处理
+   });
    ```
 
 10. 保存和撤回已保存的数据对象。
      
     ```js
     // 保存数据对象，如果应用退出后组网内设备需要恢复对象数据时调用
-    localObject.save('local').then((result) => {
+    localObject.save("local").then((result: distributedDataObject.SaveSuccessResponse) => {
       console.info(`Succeeded in saving. SessionId:${result.sessionId},version:${result.version},deviceId:${result.deviceId}`);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to save. Code:${err.code},message:${err.message}`);
     });
    
     // 撤回保存的数据对象
-    localObject.revokeSave().then((result) => {
+    localObject.revokeSave().then((result: distributedDataObject.RevokeSaveSuccessResponse) => {
       console.info(`Succeeded in revokeSaving. Session:${result.sessionId}`);
-    }).catch((err) => {
+    }).catch((err: BusinessError) => {
       console.error(`Failed to revokeSave. Code:${err.code},message:${err.message}`);
     });
     ```
@@ -292,8 +323,16 @@
 11. 删除监听分布式数据对象的上下线。可以指定删除监听的上下线回调；也可以不指定，这将会删除该分布式数据对象的所有上下线回调。
      
     ```js
+    interface offStatusCallback {
+      sessionId: string,
+      deviceId: string,
+      status: 'online' | 'offline'
+    }
     // 删除上下线回调statusCallback
-    localObject.off('status', this.statusCallback);
+    localObject.off('status', (statusCallback: offStatusCallback) => {
+      console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.deviceId);
+      // 业务处理
+    });
     // 删除所有的上下线回调
     localObject.off('status');
     ```
@@ -302,7 +341,7 @@
      
     ```js
     localObject.setSessionId(() => {
-        console.info('leave all lession.');
+      console.info('leave all session.');
     });
     ```
 

zh-cn/application-dev/reference/apis/js-apis-data-distributedobject.md

@@ -42,10 +42,20 @@ FA模型示例：
 // 导入模块
 import distributedObject from '@ohos.data.distributedDataObject';
 import featureAbility from '@ohos.ability.featureAbility';
+import { BusinessError } from '@ohos.base';
 // 获取context
 let context = featureAbility.getContext();
-// 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DataObject = distributedObject.create(context, source);
 ```
 
 Stage模型示例：
@@ -54,13 +64,23 @@ Stage模型示例：
 // 导入模块
 import distributedObject from '@ohos.data.distributedDataObject';
 import UIAbility from '@ohos.app.ability.UIAbility';
-
-let g_object = null;
-
+import { BusinessError } from '@ohos.base';
+import window from '@ohos.window';
+
+let g_object: distributedObject.DataObject = null;
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage){
-        // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-        g_object = distributedObject.create(this.context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+    onWindowStageCreate(windowStage: window.WindowStage) {
+        let source: sourceObject = {
+            name: "amy",
+            age:18,
+            isVis:false
+        }
+        g_object = distributedObject.create(this.context, source);
     }
 }
 ```
@@ -83,7 +103,7 @@ genSessionId(): string
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let sessionId = distributedObject.genSessionId();
+let sessionId: string = distributedObject.genSessionId();
 ```
 
 ## SaveSuccessResponse<sup>9+</sup>
@@ -179,7 +199,7 @@ g_object.setSessionId(distributedObject.genSessionId(), ()=>{
 });
 // 退出分布式组网
 g_object.setSessionId(() => {
-    console.info("leave all lession.");
+    console.info("leave all session.");
 });
 ```
 
@@ -219,13 +239,13 @@ setSessionId(sessionId?: string): Promise&lt;void&gt;
 // g_object加入分布式组网
 g_object.setSessionId(distributedObject.genSessionId()).then (()=>{
     console.info("join session.");
-    }).catch((error)=>{
+    }).catch((error: BusinessError)=>{
         console.info("error:" + error.code + error.message);
 });
 // 退出分布式组网
 g_object.setSessionId().then (()=>{
-    console.info("leave all lession.");
-    }).catch((error)=>{
+    console.info("leave all session.");
+    }).catch((error: BusinessError)=>{
         console.info("error:" + error.code + error.message);
 });
 ```
@@ -248,15 +268,18 @@ on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;stri
 **示例：**
 
 ```js
-globalThis.changeCallback = (sessionId, changeData) => {
-    console.info("change" + sessionId);
-    if (changeData != null && changeData != undefined) {
-        changeData.forEach(element => {
-        console.info("changed !" + element + " " + g_object[element]);
-        });
-    }
+interface ChangeCallback {
+  sessionId: string,
+  fields: Array<string>
 }
-g_object.on("change", globalThis.changeCallback);
+g_object.on("change", (changeData: ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 ```
 
 ### off('change')<sup>9+</sup>
@@ -279,7 +302,14 @@ off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;st
 
 ```js
 // 删除数据变更回调changeCallback
-g_object.off("change", globalThis.changeCallback);
+g_object.off("change", (changeData:ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 // 删除所有的数据变更回调
 g_object.off("change");
 ```
@@ -302,10 +332,15 @@ on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, st
 **示例：**
 
 ```js
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+interface onStatusCallback {
+    sessionId: string,
+    networkId: string,
+    status: 'online' | 'offline'
 }
-g_object.on("status", globalThis.statusCallback);
+
+g_object.on("status", (statusCallback:onStatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
+});
 ```
 
 ### off('status')<sup>9+</sup>
@@ -327,11 +362,15 @@ off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, s
 **示例：**
 
 ```js
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+interface offStatusCallback {
+    sessionId: string,
+    networkId: string,
+    status: 'online' | 'offline'
 }
 // 删除上下线回调changeCallback
-g_object.off("status",globalThis.statusCallback);
+g_object.off("status", (statusCallback:StatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
+});
 // 删除所有的上下线回调
 g_object.off("status");
 ```
@@ -363,7 +402,7 @@ save(deviceId: string, callback: AsyncCallback&lt;SaveSuccessResponse&gt;): void
 
 ```ts
 g_object.setSessionId("123456");
-g_object.save("local", (err, result) => {
+g_object.save("local", (err: BusinessError, result:distributedObject.SaveSuccessResponse) => {
     if (err) {
         console.info("save failed, error code = " + err.code);
         console.info("save failed, error message: " + err.message);
@@ -408,12 +447,12 @@ save(deviceId: string): Promise&lt;SaveSuccessResponse&gt;
 
 ```js
 g_object.setSessionId("123456");
-g_object.save("local").then((result) => {
+g_object.save("local").then((result: distributedObject.SaveSuccessResponse) => {
     console.info("save callback");
     console.info("save sessionId " + result.sessionId);
     console.info("save version " + result.version);
     console.info("save deviceId " + result.deviceId);
-}).catch((err) => {
+}).catch((err: BusinessError) => {
     console.info("save failed, error code = " + err.code);
     console.info("save failed, error message: " + err.message);
 });
@@ -441,7 +480,7 @@ revokeSave(callback: AsyncCallback&lt;RevokeSaveSuccessResponse&gt;): void
 ```js
 g_object.setSessionId("123456");
 // 持久化数据
-g_object.save("local", (err, result) => {
+g_object.save("local", (err: BusinessError, result: distributedObject.SaveSuccessResponse) => {
     if (err) {
         console.info("save failed, error code = " + err.code);
         console.info("save failed, error message: " + err.message);
@@ -453,7 +492,7 @@ g_object.save("local", (err, result) => {
     console.info("save deviceId:  " + result.deviceId);
 });
 // 删除持久化保存的数据
-g_object.revokeSave((err, result) => {
+g_object.revokeSave((err: BusinessError, result: distributedObject.RevokeSaveSuccessResponse) => {
     if (err) {
       console.info("revokeSave failed, error code = " + err.code);
       console.info("revokeSave failed, error message: " + err.message);
@@ -486,20 +525,20 @@ revokeSave(): Promise&lt;RevokeSaveSuccessResponse&gt;
 ```ts
 g_object.setSessionId("123456");
 // 持久化数据
-g_object.save("local").then((result) => {
+g_object.save("local").then((result: distributedObject.SaveSuccessResponse) => {
     console.info("save callback");
     console.info("save sessionId " + result.sessionId);
     console.info("save version " + result.version);
     console.info("save deviceId " + result.deviceId);
-}).catch((err) => {
+}).catch((err: BusinessError) => {
     console.info("save failed, error code = " + err.code);
     console.info("save failed, error message: " + err.message);
 });
 // 删除持久化保存的数据
-g_object.revokeSave().then((result) => {
+g_object.revokeSave().then((result: distributedObject.RevokeSaveSuccessResponse) => {
     console.info("revokeSave callback");
     console.info("sessionId" + result.sessionId);
-}).catch((err)=> {
+}).catch((err: BusinessError)=> {
     console.info("revokeSave failed, error code = " + err.code);
     console.info("revokeSave failed, error message = " + err.message);
 });
@@ -534,8 +573,17 @@ createDistributedObject(source: object): DistributedObject
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-// 创建对象，对象包含4个属性类型，string,number,boolean和Object
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 ```
 
 ## DistributedObject<sup>(deprecated)</sup>
@@ -572,7 +620,17 @@ setSessionId(sessionId?: string): boolean
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});;
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 // g_object加入分布式组网
 g_object.setSessionId(distributedObject.genSessionId());
 // 设置为""退出分布式组网
@@ -602,16 +660,29 @@ on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;stri
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
-globalThis.changeCallback = (sessionId, changeData) => {
-    console.info("change" + sessionId);
-    if (changeData != null && changeData != undefined) {
-        changeData.forEach(element => {
-        console.info("changed !" + element + " " + g_object[element]);
-        });
-    }
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+interface ChangeCallback {
+    sessionId: string,
+    fields: Array<string>
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
 }
-g_object.on("change", globalThis.changeCallback);
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
+g_object.on("change", (changeData:ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 ```
 
 ### off('change')<sup>(deprecated)</sup>
@@ -638,9 +709,30 @@ off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;st
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+interface ChangeCallback {
+    sessionId: string,
+    fields: Array<string>
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 // 删除数据变更回调changeCallback
-g_object.off("change", globalThis.changeCallback);
+g_object.off("change", (changeData:ChangeCallback) => {
+    console.info("change" + changeData.sessionId);
+    if (changeData.fields != null && changeData.fields != undefined) {
+        for (let index: number = 0; index < changeData.fields.length; index++) {
+            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
+        }
+    }
+});
 // 删除所有的数据变更回调
 g_object.off("change");
 ```
@@ -668,11 +760,27 @@ on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, st
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+interface StatusCallback {
+    sessionId: string,
+    networkId: string,
+    status: 'online' | 'offline'
+}
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
 }
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
-g_object.on("status", globalThis.statusCallback);
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
+
+g_object.on("status", (statusCallback:StatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
+});
 ```
 
 ### off('status')<sup>(deprecated)</sup>
@@ -699,12 +807,26 @@ off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, s
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
-globalThis.statusCallback = (sessionId, networkId, status) => {
-    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+interface sourceObject{
+    name: string,
+    age: number,
+    isVis: boolean
+}
+interface offStatusCallback {
+    sessionId: string,
+    deviceId: string,
+    status: 'online' | 'offline'
 }
+let source: sourceObject = {
+    name: "amy",
+    age:18,
+    isVis:false
+}
+let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 // 删除上下线回调changeCallback
-g_object.off("status",globalThis.statusCallback);
+g_object.off("status", (statusCallback:offStatusCallback) => {
+    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.deviceId);
+});
 // 删除所有的上下线回调
 g_object.off("status");
 ```