# UIExtensionContext

UIExtensionContext是[UIExtensionAbility](js-apis-app-ability-uiExtensionAbility.md)的上下文环境，继承自[ExtensionContext](js-apis-inner-application-extensionContext.md)，提供UIExtensionAbility的相关配置信息以及操作UIAbility的方法，如启动UIAbility等。

> **说明：**
>
>  - 本模块首批接口从API version 10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。
>  - 本模块接口仅可在Stage模型下使用。

## 导入模块

```ts
import common from '@ohos.app.ability.common';
```

## UIExtensionContext.startAbility

startAbility(want: Want, callback: AsyncCallback<void>): void;

启动Ability（callback形式）。

使用规则：
 - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
 - 跨应用场景下，目标Ability的exported属性若配置为false，调用方应用需申请`ohos.permission.START_INVISIBLE_ABILITY`权限
 - 组件启动规则详见：[组件启动规则（Stage模型）](../../application-models/component-startup-rules.md)

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

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| want | [Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
| callback | AsyncCallback<void> | 是 | callback形式返回启动结果。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000001 | The specified ability does not exist. |
| 16000002 | Incorrect ability type. |
| 16000004 | Can not start invisible component. |
| 16000005 | The specified process does not have the permission. |
| 16000006 | Cross-user operations are not allowed. |
| 16000008 | The crowdtesting application expires. |
| 16000009 | An ability cannot be started or stopped in Wukong mode. |
| 16000010 | The call with the continuation flag is forbidden.        |
| 16000011 | The context does not exist.        |
| 16000012 | The application is controlled.        |
| 16000013 | The application is controlled by EDM.       |
| 16000050 | Internal error. |
| 16000053 | The ability is not on the top of the UI. |
| 16000055 | Installation-free timed out. |
| 16200001 | The caller has been released. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)

## UIExtensionContext.startAbility

startAbility(want: Want, options: StartOptions, callback: AsyncCallback<void>): void;

启动Ability（callback形式）。

使用规则：
 - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
 - 跨应用场景下，目标Ability的exported属性若配置为false，调用方应用需申请`ohos.permission.START_INVISIBLE_ABILITY`权限
 - 组件启动规则详见：[组件启动规则（Stage模型）](../../application-models/component-startup-rules.md)

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

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| want | [Want](js-apis-application-want.md)  | 是 | 启动Ability的want信息。 |
| options | [StartOptions](js-apis-app-ability-startOptions.md) | 是 | 启动Ability所携带的参数。 |
| callback | AsyncCallback<void> | 是 | callback形式返回启动结果。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000001 | The specified ability does not exist. |
| 16000002 | Incorrect ability type. |
| 16000004 | Can not start invisible component. |
| 16000005 | The specified process does not have the permission. |
| 16000006 | Cross-user operations are not allowed. |
| 16000008 | The crowdtesting application expires. |
| 16000009 | An ability cannot be started or stopped in Wukong mode. |
| 16000010 | The call with the continuation flag is forbidden.        |
| 16000011 | The context does not exist.        |
| 16000012 | The application is controlled.        |
| 16000013 | The application is controlled by EDM.       |
| 16000050 | Internal error. |
| 16000053 | The ability is not on the top of the UI. |
| 16000055 | Installation-free timed out. |
| 16200001 | The caller has been released. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)

## UIExtensionContext.startAbility

startAbility(want: Want, options?: StartOptions): Promise<void>;

启动Ability（promise形式）。

使用规则：
 - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
 - 跨应用场景下，目标Ability的exported属性若配置为false，调用方应用需申请`ohos.permission.START_INVISIBLE_ABILITY`权限
 - 组件启动规则详见：[组件启动规则（Stage模型）](../../application-models/component-startup-rules.md)

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

**参数：**

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

**返回值：**

| 类型 | 说明 |
| -------- | -------- |
| Promise<void> | Promise形式返回启动结果。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000001 | The specified ability does not exist. |
| 16000002 | Incorrect ability type. |
| 16000004 | Can not start invisible component. |
| 16000005 | The specified process does not have the permission. |
| 16000006 | Cross-user operations are not allowed. |
| 16000008 | The crowdtesting application expires. |
| 16000009 | An ability cannot be started or stopped in Wukong mode. |
| 16000010 | The call with the continuation flag is forbidden.        |
| 16000011 | The context does not exist.        |
| 16000012 | The application is controlled.        |
| 16000013 | The application is controlled by EDM.       |
| 16000050 | Internal error. |
| 16000053 | The ability is not on the top of the UI. |
| 16000055 | Installation-free timed out. |
| 16200001 | The caller has been released. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)

## UIExtensionContext.startAbilityForResult

startAbilityForResult(want: Want, callback: AsyncCallback<AbilityResult>): void;

启动一个Ability。Ability被启动后，有如下情况(callback形式):
 - 正常情况下可通过调用[terminateSelfWithResult](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
 - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
 - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。

使用规则：
 - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
 - 跨应用场景下，目标Ability的exported属性若配置为false，调用方应用需申请`ohos.permission.START_INVISIBLE_ABILITY`权限
 - 组件启动规则详见：[组件启动规则（Stage模型）](../../application-models/component-startup-rules.md)

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

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| want |[Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
| callback | AsyncCallback<[AbilityResult](js-apis-inner-ability-abilityResult.md)> | 是 | 执行结果回调函数。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000001 | The specified ability does not exist. |
| 16000002 | Incorrect ability type. |
| 16000004 | Can not start invisible component. |
| 16000005 | The specified process does not have the permission. |
| 16000006 | Cross-user operations are not allowed. |
| 16000008 | The crowdtesting application expires. |
| 16000009 | An ability cannot be started or stopped in Wukong mode. |
| 16000010 | The call with the continuation flag is forbidden. |
| 16000011 | The context does not exist. |
| 16000012 | The application is controlled.        |
| 16000013 | The application is controlled by EDM.       |
| 16000050 | Internal error. |
| 16000053 | The ability is not on the top of the UI. |
| 16000055 | Installation-free timed out. |
| 16200001 | The caller has been released. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)

## UIExtensionContext.startAbilityForResult

startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback<AbilityResult>): void;

启动一个Ability。Ability被启动后，有如下情况(callback形式):
 - 正常情况下可通过调用[terminateSelfWithResult](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
 - 异常情况下比如杀死Ability会返回异常信息给调用方，异常信息中resultCode为-1。
 - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方，其它调用方返回异常信息, 异常信息中resultCode为-1。

使用规则：
 - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
 - 跨应用场景下，目标Ability的exported属性若配置为false，调用方应用需申请`ohos.permission.START_INVISIBLE_ABILITY`权限
 - 组件启动规则详见：[组件启动规则（Stage模型）](../../application-models/component-startup-rules.md)

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

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| want |[Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
| options | [StartOptions](js-apis-app-ability-startOptions.md) | 是 | 启动Ability所携带的参数。 |
| callback | AsyncCallback<[AbilityResult](js-apis-inner-ability-abilityResult.md)> | 是 | 执行结果回调函数。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000001 | The specified ability does not exist. |
| 16000002 | Incorrect ability type. |
| 16000004 | Can not start invisible component. |
| 16000005 | The specified process does not have the permission. |
| 16000006 | Cross-user operations are not allowed. |
| 16000008 | The crowdtesting application expires. |
| 16000009 | An ability cannot be started or stopped in Wukong mode. |
| 16000010 | The call with the continuation flag is forbidden. |
| 16000011 | The context does not exist. |
| 16000012 | The application is controlled.        |
| 16000013 | The application is controlled by EDM.       |
| 16000050 | Internal error. |
| 16000053 | The ability is not on the top of the UI. |
| 16000055 | Installation-free timed out. |
| 16200001 | The caller has been released. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)

## UIExtensionContext.startAbilityForResult

startAbilityForResult(want: Want, options?: StartOptions): Promise<AbilityResult>;

启动一个Ability。Ability被启动后，有如下情况(promise形式):
 - 正常情况下可通过调用[terminateSelfWithResult](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
 - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
 - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。

使用规则：
 - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
 - 跨应用场景下，目标Ability的exported属性若配置为false，调用方应用需申请`ohos.permission.START_INVISIBLE_ABILITY`权限
 - 组件启动规则详见：[组件启动规则（Stage模型）](../../application-models/component-startup-rules.md)

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

**参数：**

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


**返回值：**

| 类型 | 说明 |
| -------- | -------- |
| Promise<[AbilityResult](js-apis-inner-ability-abilityResult.md)> | Promise形式返回执行结果。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000001 | The specified ability does not exist. |
| 16000002 | Incorrect ability type. |
| 16000004 | Can not start invisible component. |
| 16000005 | The specified process does not have the permission. |
| 16000006 | Cross-user operations are not allowed. |
| 16000008 | The crowdtesting application expires. |
| 16000009 | An ability cannot be started or stopped in Wukong mode. |
| 16000010 | The call with the continuation flag is forbidden. |
| 16000011 | The context does not exist. |
| 16000012 | The application is controlled.        |
| 16000013 | The application is controlled by EDM.       |
| 16000050 | Internal error. |
| 16000053 | The ability is not on the top of the UI. |
| 16000055 | Installation-free timed out. |
| 16200001 | The caller has been released. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)


## UIExtensionContext.connectServiceExtensionAbility

connectServiceExtensionAbility(want: Want, options: ConnectOptions): number;

将当前Ability连接到一个使用AbilityInfo.AbilityType.SERVICE模板的Ability。

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

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| want | [Want](js-apis-application-want.md) | 是 | 连接ServiceExtensionAbility的want信息。 |
| options | [ConnectOptions](js-apis-inner-ability-connectOptions.md) | 是 | 与ServiceExtensionAbility建立连接后回调函数的实例。 |

**返回值：**

| 类型 | 说明 |
| -------- | -------- |
| number | 返回Ability连接的结果code。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000001 | The specified ability does not exist. |
| 16000002 | Incorrect ability type. |
| 16000004 | Can not start invisible component. |
| 16000005 | The specified process does not have the permission. |
| 16000006 | Cross-user operations are not allowed. |
| 16000008 | The crowdtesting application expires. |
| 16000053 | The ability is not on the top of the UI. |
| 16000055 | Installation-free timed out. |
| 16000011 | The context does not exist.        |
| 16000050 | Internal error. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)



## UIExtensionContext.disconnectServiceExtensionAbility

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

断开与ServiceExtensionAbility的连接，断开连接之后需要将连接成功时返回的remote对象置空（promise形式）。

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

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| connection | number | 是 | 连接的ServiceExtensionAbility的数字代码，即connectServiceExtensionAbility返回的connectionId。 |

**返回值：**

| 类型 | 说明 |
| -------- | -------- |
| Promise\<void> | 返回执行结果。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000011 | The context does not exist. |
| 16000050 | Internal error. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)

## UIExtensionContext.disconnectServiceExtensionAbility

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

断开与ServiceExtensionAbility的连接，断开连接之后需要将连接成功时返回的remote对象置空（callback形式）。

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

**参数：**

| 参数名 | 类型 | 必填 | 说明 |
| -------- | -------- | -------- | -------- |
| connection | number | 是 | 连接的ServiceExtensionAbility的数字代码，即connectServiceExtensionAbility返回的connectionId。 |
| callback | AsyncCallback\<void> | 是 | callback形式返回断开连接的结果。 |

**错误码：**

| 错误码ID | 错误信息 |
| ------- | -------------------------------- |
| 16000011 | The context does not exist. |
| 16000050 | Internal error. |

错误码详细介绍请参考[errcode-ability](../errorcodes/errorcode-ability.md)