js-apis-ability-context.md

# AbilityContext

> ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
> 本模块首批接口从API version 9开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。


Ability的上下文环境，继承自Context。


## 使用说明


在使用AbilityContext的功能前，需要通过Ability子类实例获取。



```js
import Ability from '@ohos.application.Ability'
class MainAbility extends Ability {
    onWindowStageCreate(windowStage) {
        let context = this.context;
    }
}
```


## 属性

| 名称 | 参数类型 | 可读 | 可写 | 说明 | 
| -------- | -------- | -------- | -------- | -------- |
| abilityInfo | AbilityInfo | 是 | 否 | Abilityinfo相关信息 <br/>**系统能力**：SystemCapability.Ability.AbilityRuntime.Core| 
| currentHapModuleInfo | HapModuleInfo | 是 | 否 | 当前hap包的信息 <br/>**系统能力**：SystemCapability.Ability.AbilityRuntime.Core| 


## AbilityContext.startAbility

startAbility(want: Want, callback: AsyncCallback&lt;void&gt;): void

启动Ability。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | want | [Want](js-apis-featureAbility.md#Want类型说明) | 是 | 启动Ability的want信息。 | 
  | callback | AsyncCallback&lt;void&gt; | 是 | callback形式返回启动结果 | 

**示例：**

  ```js
  var want = {
  	"deviceId": "",
  	"bundleName": "com.extreme.test",
  	"abilityName": "com.extreme.test.MainAbility"
  };
  this.context.startAbility(want, (error) => {
      console.log("error.code = " + error.code)
  })
  ```


## AbilityContext.startAbility

startAbility(want: Want, options: StartOptions, callback: AsyncCallback&lt;void&gt;): void

启动Ability。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | want | [Want](js-apis-featureAbility.md#Want类型说明)  | 是 | 启动Ability的want信息。 | 
  | options | StartOptions | 是 | 启动Ability所携带的参数。 |
  | callback | AsyncCallback&lt;void&gt; | 是 | callback形式返回启动结果。 | 

**示例：**
    
  ```js
  var want = {
  	"deviceId": "",
  	"bundleName": "com.extreme.test",
  	"abilityName": "com.extreme.test.MainAbility"
  };
  var options = {
  	windowMode: 0,
  };
  this.context.startAbility(want, options, (error) => {
      console.log("error.code = " + error.code)
  })
  ```


## AbilityContext.startAbility

startAbility(want: Want, options?: StartOptions): Promise&lt;void&gt;;

启动Ability。通过Promise返回结果。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | want | [Want](js-apis-featureAbility.md#Want类型说明) | 是 | 启动Ability的want信息。 | 
  | options | StartOptions | 否 | 启动Ability所携带的参数。 |

**返回值：**

  | 类型 | 说明 | 
  | -------- | -------- |
  | Promise&lt;void&gt; | Promise形式返回启动结果。 | 

**示例：**

  ```js
  var want = {
  	"deviceId": "",
  	"bundleName": "com.extreme.test",
  	"abilityName": "com.extreme.test.MainAbility"
  };
  var options = {
  	windowMode: 0,
  };
  this.context.startAbility(want, options)
  .then((data) => {
      console.log('Operation successful.')
  }).catch((error) => {
      console.log('Operation failed.');
  })
  ```


## AbilityContext.startAbilityForResult

startAbilityForResult(want: Want, callback: AsyncCallback&lt;AbilityResult&gt;): void;

启动Ability并在结束的时候返回执行结果。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 |
  | -------- | -------- | -------- | -------- |
  | want |[Want](js-apis-featureAbility.md#Want类型说明) | 是 | 启动Ability的want信息。 |
  | callback | AsyncCallback&lt;[AbilityResult](js-apis-featureAbility.md#abilityresult)&gt; | 是 | 执行结果回调函数。 |


**示例：**

  ```js
  this.context.startAbilityForResult(
      {bundleName: "com.extreme.myapplication", abilityName: "MainAbilityDemo2"},
      (error, result) => {
          console.log("startAbilityForResult AsyncCallback is called, error.code = " + error.code)
          console.log("startAbilityForResult AsyncCallback is called, result.resultCode = " + result.resultCode)
       }
  );
  ```

## AbilityContext.startAbilityForResult

startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback&lt;AbilityResult&gt;): void;

启动Ability并在结束的时候返回执行结果。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 |
  | -------- | -------- | -------- | -------- |
  | want |[Want](js-apis-featureAbility.md#Want类型说明) | 是 | 启动Ability的want信息。 |
  | options | StartOptions | 是 | 启动Ability所携带的参数。 |
  | callback | AsyncCallback&lt;[AbilityResult](js-apis-featureAbility.md#abilityresult)&gt; | 是 | 执行结果回调函数。 |


**示例：**

  ```js
  var options = {
    windowMode: 0,
  };
  this.context.startAbilityForResult(
      {bundleName: "com.extreme.myapplication", abilityName: "MainAbilityDemo2"}, options,
      (error, result) => {
          console.log("startAbilityForResult AsyncCallback is called, error.code = " + error.code)
          console.log("startAbilityForResult AsyncCallback is called, result.resultCode = " + result.resultCode)
       }
  );
  ```


## AbilityContext.startAbilityForResult

startAbilityForResult(want: Want, options?: StartOptions): Promise&lt;AbilityResult&gt;;

启动Ability并在结束的时候返回执行结果。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | want | [Want](js-apis-featureAbility.md#Want类型说明) | 是 | 启动Ability的want信息。 |
  | options | StartOptions | 否 | 启动Ability所携带的参数。 |


**返回值：**

  | 类型 | 说明 |
  | -------- | -------- |
  | Promise&lt;[AbilityResult](js-apis-featureAbility.md#abilityresult)&gt; | Promise形式返回执行结果。 |

**示例：**

  ```js
  var options = {
    windowMode: 0,
  };
  this.context.startAbilityForResult({bundleName: "com.extreme.myapplication", abilityName: "MainAbilityDemo2"}, options).then((result) => {
      console.log("startAbilityForResult Promise.resolve is called, result.resultCode = " + result.resultCode)
  }, (error) => {
      console.log("startAbilityForResult Promise.Reject is called, error.code = " + error.code)
  })
  ```


## AbilityContext.terminateSelf

terminateSelf(callback: AsyncCallback&lt;void&gt;): void;

停止Ability自身。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | callback | AsyncCallback&lt;void&gt; | 是 | 回调函数，返回接口调用是否成功的结果。 | 

**示例：**

  ```js
  this.context.terminateSelf((err) => {
      console.log('terminateSelf result:' + JSON.stringify(err));
  });
  ```


## AbilityContext.terminateSelf

terminateSelf(): Promise&lt;void&gt;;

停止Ability自身。通过Promise返回结果。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**返回值：**

  | 类型 | 说明 | 
  | -------- | -------- |
  | Promise&lt;void&gt; | 返回一个Promise，包含接口的结果。 | 

**示例：**

  ```js
  this.context.terminateSelf(want).then((data) => {
      console.log('success:' + JSON.stringify(data));
  }).catch((error) => {
      console.log('failed:' + JSON.stringify(error));
  });
  ```


## AbilityContext.terminateSelfWithResult

terminateSelfWithResult(parameter: AbilityResult, callback: AsyncCallback&lt;void&gt;): void;

停止Ability，并返回给调用startAbilityForResult 接口调用方的相关信息。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 |
  | -------- | -------- | -------- | -------- |
  | parameter | [AbilityResult](js-apis-featureAbility.md#abilityresult) | 是 | 返回给调用startAbilityForResult&nbsp;接口调用方的相关信息。 |
  | callback | AsyncCallback&lt;void&gt; | 是 | callback形式返回停止结果。 |

**示例：**

  ```js
  this.context.terminateSelfWithResult(
     {
          want: {bundleName: "com.extreme.myapplication", abilityName: "MainAbilityDemo"},
          resultCode: 100
      }, (error) => {
          console.log("terminateSelfWithResult is called = " + error.code)
      }
  );
  ```


## AbilityContext.terminateSelfWithResult

terminateSelfWithResult(parameter: AbilityResult): Promise&lt;void&gt;;

停止Ability，并返回给调用startAbilityForResult 接口相关信息。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 |
  | -------- | -------- | -------- | -------- |
  | parameter | [AbilityResult](js-apis-featureAbility.md#abilityresult) | 是 | 返回给startAbilityForResult&nbsp;调用方的信息。 |

**返回值：**

  | 类型 | 说明 | 
  | -------- | -------- |
  | Promise&lt;void&gt; | promise形式返回停止结果。 | 

**示例：**

  ```js
  this.context.terminateSelfWithResult(
  {
      want: {bundleName: "com.extreme.myapplication", abilityName: "MainAbilityDemo"},
      resultCode: 100
  }).then((result) => {
      console.log("terminateSelfWithResult")
  }
  )
  ```


## AbilityContext.startAbilityByCall

startAbilityByCall(want: Want): Promise&lt;Caller&gt;;

获取指定通用组件服务端的caller通信接口, 并且将指定通用组件服务端拉起并切换到后台。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | want | [Want](js-apis-featureAbility.md#Want类型说明) | 是 | 传入需要启动的ability的信息，包含ability名称、包名、设备ID，设备ID缺省或为空表示启动本地ability。 | 

**返回值：**

  | 类型 | 说明 | 
  | -------- | -------- |
  | Promise&lt;Caller&gt; | 获取要通讯的caller对象。 | 

**示例：**
    
  ```js
  import Ability from '@ohos.application.Ability';
  var caller;
  export default class MainAbility extends Ability {
      onWindowStageCreate(windowStage) {
          this.context.startAbilityByCall({
              bundleName: "com.example.myservice",
              abilityName: "com.example.myservice.MainAbility",
              deviceId: ""
          }).then((obj) => {
              caller = obj;
              console.log('Caller GetCaller Get ' + call);
          }).catch((e) => {
              console.log('Caller GetCaller error ' + e);
          });
      }
  }
  ```


## AbilityContext.requestPermissionsFromUser

requestPermissionsFromUser(permissions: Array&lt;string&gt;, requestCallback: AsyncCallback&lt;PermissionRequestResult&gt;) : void;

拉起弹窗请求用户授权。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | permissions | Array&lt;string&gt; | 是 | 权限列表。 | 
  | callback | AsyncCallback&lt;[PermissionRequestResult](js-apis-permissionrequestresult.md)&gt; | 是 | 回调函数，返回接口调用是否成功的结果。 | 

**示例：**
    
  ```
  this.context.requestPermissionsFromUser(permissions,(result) => {
      console.log('requestPermissionsFromUserresult:' + JSON.stringify(result));
  });
  ```


## AbilityContext.requestPermissionsFromUser

requestPermissionsFromUser(permissions: Array&lt;string&gt;) : Promise&lt;PermissionRequestResult&gt;;

拉起弹窗请求用户授权。通过Promise返回结果。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | permissions | Array&lt;string&gt; | 是 | 权限列表。 |

**返回值：**

  | 类型 | 说明 | 
  | -------- | -------- |
  | Promise&lt;[PermissionRequestResult](js-apis-permissionrequestresult.md)&gt; | 返回一个Promise，包含接口的结果。 | 

**示例：**
    
  ```
  this.context.requestPermissionsFromUser(permissions).then((data) => {
      console.log('success:' + JSON.stringify(data));
  }).catch((error) => {
      console.log('failed:' + JSON.stringify(error));
  });
  ```


## AbilityContext.setMissionLabel

setMissionLabel(label: string, callback:AsyncCallback&lt;void&gt;): void;

设置ability在任务中显示的名称。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | label | string | 是 | 显示名称。 | 
  | callback | AsyncCallback&lt;void&gt; | 是 | 回调函数，返回接口调用是否成功的结果。 | 

**示例：**
    
  ```js
  this.context.setMissionLabel("test",(result) => {
      console.log('requestPermissionsFromUserresult:' + JSON.stringify(result));
  });
  ```


## AbilityContext.setMissionLabel

setMissionLabel(label: string): Promise&lt;void&gt;

设置ability在任务中显示的名称。

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | label | string | 是 | 显示名称。 | 

**返回值：**

  | 类型 | 说明 | 
  | -------- | -------- |
  | Promise&lt;void&gt; | 返回一个Promise，包含接口的结果。 | 

**示例：**
    
  ```js
  this.context.setMissionLabel("test").then((data) => {
      console.log('success:' + JSON.stringify(data));
  }).catch((error) => {
      console.log('failed:' + JSON.stringify(error));
  });
  ```