# particleAbility模块

> ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
> 本模块首批接口从API version 7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。

## 使用限制

particleAbility模块用来对Data和Service类型的Ability进行操作。

## 导入模块

```js
import particleAbility from '@ohos.ability.particleAbility'
```

## particleAbility.startAbility

startAbility(parameter: StartAbilityParameter, callback: AsyncCallback\<void>): void

使用此方法启动指定的particleAbility（callback形式）。

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

**参数：**


| 名称      | 类型                                            | 必填 | 描述              |
| --------- | ----------------------------------------------- | ---- | ----------------- |
| parameter | [StartAbilityParameter](js-apis-featureAbility.md#startabilityparameter) | 是   | 指示启动的ability |
| callback  | AsyncCallback\<void>                            | 是   | 被指定的回调方法  |

**示例：**

```js
import particleAbility from '@ohos.ability.particleAbility'
import wantConstant from '@ohos.ability.wantConstant'
particleAbility.startAbility(
	{
        want:
        {
            action: "action.system.home",
            entities: ["entity.system.home"],
            type: "MIMETYPE",
            flags: wantConstant.Flags.FLAG_AUTH_READ_URI_PERMISSION,
            deviceId: "",
            bundleName: "com.example.Data",
            abilityName: "com.example.Data.MainAbility",
            uri:""
        },
    },
    (error, result) => {
		console.log('particleAbility startAbility errCode:' + error + 'result:' + result)
    },
)
```



## particleAbility.startAbility

startAbility(parameter: StartAbilityParameter): Promise\<void>;

使用此方法启动指定的particleAbility（Promise形式）。

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

**参数：**


| 名称      | 类型                                            | 必填 | 描述              |
| --------- | ----------------------------------------------- | ---- | ----------------- |
| parameter | [StartAbilityParameter](js-apis-featureAbility.md#startabilityparameter) | 是   | 指示启动的ability |

**返回值：**

| 类型           | 说明                      |
| -------------- | ------------------------- |
| Promise\<void> | 使用Promise形式返回结果。 |

**示例：**

```js
import particleAbility from '@ohos.ability.particleAbility'
import wantConstant from '@ohos.ability.wantConstant'
particleAbility.startAbility(
	{
        want:
        {
            action: "action.system.home",
            entities: ["entity.system.home"],
            type: "MIMETYPE",
            flags: wantConstant.Flags.FLAG_AUTH_READ_URI_PERMISSION,
            deviceId: "",
            bundleName: "com.example.Data",
            abilityName: "com.example. Data.MainAbility",
            uri:""
        },
    },
).then((data) => {
    console.info("particleAbility startAbility");
});
```



## particleAbility.terminateSelf

terminateSelf(callback: AsyncCallback\<void>): void

终止particleAbility（callback形式）。

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

**参数：**

| 名称     | 类型                 | 必填 | 描述                 |
| -------- | -------------------- | ---- | -------------------- |
| callback | AsyncCallback\<void> | 是   | 表示被指定的回调方法 |

**示例：**

```js
import particleAbility from '@ohos.ability.particleAbility'
particleAbility.terminateSelf(
    (error, result) => {
		console.log('particleAbility terminateSelf errCode:' + error + 'result:' + result)
    }
)
```



## particleAbility.terminateSelf

terminateSelf(): Promise\<void>

终止particleAbility（Promise形式）。

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

**返回值：**

| 类型           | 说明                      |
| -------------- | ------------------------- |
| Promise\<void> | 使用Promise形式返回结果。 |

**示例：**

```js
import particleAbility from '@ohos.ability.particleAbility'
particleAbility.terminateSelf().then((data) => {
	console.info("particleAbility terminateSelf");
});
```



## particleAbility.acquireDataAbilityHelper

acquireDataAbilityHelper(uri: string): DataAbilityHelper

获取dataAbilityHelper。

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

**参数：**

| 名称 | 类型   | 必填 | 描述                     |
| :--- | ------ | ---- | ------------------------ |
| uri  | string | 是   | 指示要打开的文件的路径。 |

**返回值：**

| 类型              | 说明                                         |
| ----------------- | -------------------------------------------- |
| DataAbilityHelper | 用来协助其他Ability访问DataAbility的工具类。 |

**示例：**

```js
import particleAbility from '@ohos.ability.particleAbility'     
var uri = "";
particleAbility.acquireDataAbilityHelper(uri)
```


## particleAbility.startBackgroundRunning

startBackgroundRunning(id: number, request: NotificationRequest, callback: AsyncCallback&lt;void&gt;): void;

向系统申请长时任务，使用callback形式返回结果，建议使用新接口[backgroundTaskManager.startBackgroundRunning](js-apis-backgroundTaskManager.md#backgroundtaskmanagerstartbackgroundrunning8)。

**需要权限:** ohos.permission.KEEP_BACKGROUND_RUNNING

**系统能力**：SystemCapability.ResourceSchedule.BackgroundTaskManager.ContinuousTask

**参数：**

  | 参数名 | 类型 | 必填 | 说明 |
  | -------- | -------- | -------- | -------- |
  | id | number | 是 | 长时任务通知id号 |
  | request | NotificationRequest | 是 | 通知参数，用于显示通知栏的信息 |
  | callback | AsyncCallback&lt;void&gt; | 是 | callback形式返回启动长时任务的结果 |

 **示例**：

```js
import notification from '@ohos.notification';
import particleAbility from '@ohos.ability.particleAbility';
import wantAgent from '@ohos.wantAgent';

function callback(err, data) {
    if (err) {
        console.error("Operation failed Cause: " + err);
    } else {
        console.info("Operation succeeded");
    }
}

let wantAgentInfo = {
    wants: [
        {
            bundleName: "com.example.myapplication",
            abilityName: "com.example.myapplication.MainAbility"
        }
    ],
    operationType: wantAgent.OperationType.START_ABILITY,
    requestCode: 0,
    wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
};

wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
    let basicContent = {
        title: "title",
        text: "text"
    };
    let notificationContent = {
        contentType: notification.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT,
        normal: basicContent
    };
    let request = {
        content: notificationContent,
        wantAgent: wantAgentObj
    };
    let id = 1;
    particleAbility.startBackgroundRunning(id, request, callback);
});

```

## particleAbility.startBackgroundRunning

startBackgroundRunning(id: number, request: NotificationRequest): Promise&lt;void&gt;

**需要权限:** ohos.permission.KEEP_BACKGROUND_RUNNING

**系统能力**：SystemCapability.ResourceSchedule.BackgroundTaskManager.ContinuousTask

向系统申请长时任务，使用promise形式返回结果，建议使用新接口[backgroundTaskManager.startBackgroundRunning](js-apis-backgroundTaskManager.md#backgroundtaskmanagerstartbackgroundrunning8-1)。

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| id | number | 是 | 长时任务通知id号 |
| request | NotificationRequest | 是 | 通知参数，用于显示通知栏的信息 |

**返回值：**

| 类型           | 说明                      |
| -------------- | ------------------------- |
| Promise\<void> | 使用Promise形式返回结果。 |

**示例**：

```js
import notification from '@ohos.notification';
import particleAbility from '@ohos.ability.particleAbility';
import wantAgent from '@ohos.wantAgent';

let wantAgentInfo = {
    wants: [
        {
            bundleName: "com.example.myapplication",
            abilityName: "com.example.myapplication.MainAbility"
        }
    ],
    operationType: wantAgent.OperationType.START_ABILITY,
    requestCode: 0,
    wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
};

wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
    let basicContent = {
        title: "title",
        text: "text"
    };
    let notificationContent = {
        contentType: notification.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT,
        normal: basicContent
    };
    let request = {
        content: notificationContent,
        wantAgent: wantAgentObj
    };
    let id = 1;
    particleAbility.startBackgroundRunning(id, request).then(() => {
        console.info("Operation succeeded");
    }).catch((err) => {
        console.error("Operation failed Cause: " + err);
    });
});

```

## particleAbility.cancelBackgroundRunning

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

向系统申请取消长时任务，使用callback形式返回结果，建议使用新接口[backgroundTaskManager.stopBackgroundRunning](js-apis-backgroundTaskManager.md#backgroundtaskmanagerstopbackgroundrunning8)。

**系统能力**：SystemCapability.ResourceSchedule.BackgroundTaskManager.ContinuousTask

 **参数：**

  | 参数名 | 类型 | 必填 | 说明 |
  | -------- | -------- | -------- | -------- |
  | callback | AsyncCallback&lt;void&gt; | 是 | callback形式返回启动长时任务的结果 |

 **示例**：

```js
import particleAbility from '@ohos.ability.particleAbility';

function callback(err, data) {
    if (err) {
        console.error("Operation failed Cause: " + err);
    } else {
        console.info("Operation succeeded");
    }
}

particleAbility.cancelBackgroundRunning(callback);

```

## particleAbility.cancelBackgroundRunning

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

向系统申请取消长时任务，使用promise形式返回结果，建议使用新接口[backgroundTaskManager.stopBackgroundRunning](js-apis-backgroundTaskManager.md#backgroundtaskmanagerstopbackgroundrunning8-1)。

**系统能力**：SystemCapability.ResourceSchedule.BackgroundTaskManager.ContinuousTask

**返回值：**

| 类型           | 说明                      |
| -------------- | ------------------------- |
| Promise\<void> | 使用Promise形式返回结果。 |

 **示例**：

```js
import particleAbility from '@ohos.ability.particleAbility';

particleAbility.cancelBackgroundRunning().then(() => {
    console.info("Operation succeeded");
}).catch((err) => {
    console.error("Operation failed Cause: " + err);
});

```


## particleAbility.connectAbility

connectAbility(request: Want, options:ConnectOptions): number

将当前ability连接到指定ServiceAbility（callback形式）。

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

**参数：**

| 名称    | 类型           | 必填 | 描述                         |
| ------- | -------------- | ---- | ---------------------------- |
| request | [Want](js-apis-application-Want.md)           | 是   | 表示被连接的ServiceAbility。 |
| options | ConnectOptions | 是   | 被指定的回调方法。           |


**ConnectOptions类型说明：**

**系统能力**：以下各项对应的系统能力均为SystemCapability.Ability.AbilityRuntime.Core

| 名称           | 读写属性 | 类型       | 必填   | 描述                        |
| ------------ | ---- | -------- | ---- | ------------------------- |
| onConnect    | 只读   | function | 是    | 连接成功时的回调函数。               |
| onDisconnect | 只读   | function | 是    | 连接失败时的回调函数。               |
| onFailed     | 只读   | function | 是    | ConnectAbility调用失败时的回调函数。 |

**示例**：

```js
        function onConnectCallback(element, remote){
            console.log('ConnectAbility onConnect remote is proxy:' + (remote instanceof rpc.RemoteProxy));
        }
        function onDisconnectCallback(element){
            console.log('ConnectAbility onDisconnect element.deviceId : ' + element.deviceId)
        }
        function onFailedCallback(code){
            console.log('particleAbilityTest ConnectAbility onFailed errCode : ' + code)
        }
        var connId = particleAbility.connectAbility(
            {
                bundleName: "com.ix.ServiceAbility",
                abilityName: "ServiceAbilityA",
            },
            {
                onConnect: onConnectCallback,
                onDisconnect: onDisconnectCallback,
                onFailed: onFailedCallback,
            },
        );

        particleAbility.disconnectAbility(connId).then((error,data)=>{
            console.log('particleAbilityTest result errCode : ' + error.code + " data: " + data);
        });
    

```


## particleAbility.disconnectAbility

disconnectAbility(connection: number, callback:AsyncCallback\<void>): void;

将功能与服务功能断开连接。

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

**参数：**

  | 参数名 | 类型 | 必填 | 说明 |
  | -------- | -------- | -------- | -------- |
  | callback | AsyncCallback&lt;void&gt; | 是 | callback形式返回断开连接的结果 |

**示例**：

```js
 function onConnectCallback(element, remote){
            console.log('ConnectAbility onConnect remote is proxy:' + (remote instanceof rpc.RemoteProxy));
        }
        function onDisconnectCallback(element){
            console.log('ConnectAbility onDisconnect element.deviceId : ' + element.deviceId)
        }
        function onFailedCallback(code){
            console.log('particleAbilityTest ConnectAbility onFailed errCode : ' + code)
        }
        var connId = particleAbility.connectAbility(
            {
                bundleName: "com.ix.ServiceAbility",
                abilityName: "ServiceAbilityA",
            },
            {
                onConnect: onConnectCallback,
                onDisconnect: onDisconnectCallback,
                onFailed: onFailedCallback,
            },
        );
        var result = particleAbility.disconnectAbility(connId,
            (error,data) => {
                console.log('particleAbilityTest DisConnectJsSameBundleName result errCode : ' + error.code + " data: " + data)
            },
        );

```


## particleAbility.disconnectAbility

disconnectAbility(connection: number): Promise\<void>;

将功能与服务功能断开连接。

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

**返回值：**

| 类型           | 说明                      |
| -------------- | ------------------------- |
| Promise\<void> | 使用Promise形式返回结果。 |

**示例**：

```js
function onConnectCallback(element, remote){
            console.log('ConnectAbility onConnect remote is proxy:' + (remote instanceof rpc.RemoteProxy));
        }
        function onDisconnectCallback(element){
            console.log('ConnectAbility onDisconnect element.deviceId : ' + element.deviceId)
        }
        function onFailedCallback(code){
            console.log('particleAbilityTest ConnectAbility onFailed errCode : ' + code)
        }
        var connId = particleAbility.connectAbility(
            {
                bundleName: "com.ix.ServiceAbility",
                abilityName: "ServiceAbilityA",
            },
            {
                onConnect: onConnectCallback,
                onDisconnect: onDisconnectCallback,
                onFailed: onFailedCallback,
            },
        );

        particleAbility.disconnectAbility(connId).then((error,data)=>{
            console.log('particleAbilityTest result errCode : ' + error.code + " data: " + data);
        });

```

## ErrorCode

获取错误代码。

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

| 变量                          | 值   | 说明                                                         |
| ----------------------------- | ---- | ------------------------------------------------------------ |
| INVALID_PARAMETER         | -1    | 无效的参数。 |