1e41f4b71Sopenharmony_ci# @ohos.app.ability.UIAbility (UIAbility)
2e41f4b71Sopenharmony_ci
3e41f4b71Sopenharmony_ciUIAbility是包含UI界面的应用组件,继承自[Ability](js-apis-app-ability-ability.md),提供组件创建、销毁、前后台切换等生命周期回调,同时也具备组件协同的能力,组件协同主要提供如下常用功能:
4e41f4b71Sopenharmony_ci
5e41f4b71Sopenharmony_ci- [Caller](#caller):由[startAbilityByCall](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextstartabilitybycall)接口返回,CallerAbility(调用者)可使用Caller与CalleeAbility(被调用者)进行通信。
6e41f4b71Sopenharmony_ci- [Callee](#callee):UIAbility的内部对象,CalleeAbility(被调用者)可以通过Callee与Caller进行通信。
7e41f4b71Sopenharmony_ci
8e41f4b71Sopenharmony_ci各类Ability的继承关系详见[继承关系说明](./js-apis-app-ability-ability.md#ability的继承关系说明)。
9e41f4b71Sopenharmony_ci
10e41f4b71Sopenharmony_ci> **说明:**
11e41f4b71Sopenharmony_ci>
12e41f4b71Sopenharmony_ci> 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。
13e41f4b71Sopenharmony_ci>
14e41f4b71Sopenharmony_ci> 本模块接口仅可在Stage模型下使用。
15e41f4b71Sopenharmony_ci
16e41f4b71Sopenharmony_ci## 导入模块
17e41f4b71Sopenharmony_ci
18e41f4b71Sopenharmony_ci```ts
19e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
20e41f4b71Sopenharmony_ci```
21e41f4b71Sopenharmony_ci
22e41f4b71Sopenharmony_ci## 属性
23e41f4b71Sopenharmony_ci
24e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
25e41f4b71Sopenharmony_ci
26e41f4b71Sopenharmony_ci| 名称 | 类型 | 只读 | 可选 | 说明 |
27e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- | -------- |
28e41f4b71Sopenharmony_ci| context | [UIAbilityContext](js-apis-inner-application-uiAbilityContext.md) | 否 | 否 | 上下文。<br>**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。 |
29e41f4b71Sopenharmony_ci| launchWant | [Want](js-apis-app-ability-want.md) | 否 | 否 | UIAbility启动时的参数。<br>**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。 |
30e41f4b71Sopenharmony_ci| lastRequestWant | [Want](js-apis-app-ability-want.md) | 否 | 否 | UIAbility最后请求时的参数。<br>**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。|
31e41f4b71Sopenharmony_ci| callee | [Callee](#callee) | 否 | 否 | 调用Stub(桩)服务对象。|
32e41f4b71Sopenharmony_ci
33e41f4b71Sopenharmony_ci## UIAbility.onCreate
34e41f4b71Sopenharmony_ci
35e41f4b71Sopenharmony_cionCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void
36e41f4b71Sopenharmony_ci
37e41f4b71Sopenharmony_ciUIAbility实例处于完全关闭状态下被创建完成后进入该生命周期回调,执行初始化业务逻辑操作。即UIAbility实例[冷启动](../../application-models/uiability-intra-device-interaction.md#目标uiability冷启动)时进入该生命周期回调。同步接口,不支持异步回调。
38e41f4b71Sopenharmony_ci
39e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
40e41f4b71Sopenharmony_ci
41e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
42e41f4b71Sopenharmony_ci
43e41f4b71Sopenharmony_ci**参数:**
44e41f4b71Sopenharmony_ci
45e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
46e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
47e41f4b71Sopenharmony_ci| want | [Want](js-apis-app-ability-want.md) | 是 | 当前UIAbility的Want类型信息,包括ability名称、bundle名称等。 |
48e41f4b71Sopenharmony_ci| launchParam | [AbilityConstant.LaunchParam](js-apis-app-ability-abilityConstant.md#launchparam) | 是 | 创建&nbsp;ability、上次异常退出的原因信息。 |
49e41f4b71Sopenharmony_ci
50e41f4b71Sopenharmony_ci**示例:**
51e41f4b71Sopenharmony_ci
52e41f4b71Sopenharmony_ci```ts
53e41f4b71Sopenharmony_ciimport { UIAbility, AbilityConstant, Want } from '@kit.AbilityKit';
54e41f4b71Sopenharmony_ci
55e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
56e41f4b71Sopenharmony_ci  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {
57e41f4b71Sopenharmony_ci    console.log(`onCreate, want: ${want.abilityName}`);
58e41f4b71Sopenharmony_ci  }
59e41f4b71Sopenharmony_ci}
60e41f4b71Sopenharmony_ci```
61e41f4b71Sopenharmony_ci
62e41f4b71Sopenharmony_ci
63e41f4b71Sopenharmony_ci## UIAbility.onWindowStageCreate
64e41f4b71Sopenharmony_ci
65e41f4b71Sopenharmony_cionWindowStageCreate(windowStage: window.WindowStage): void
66e41f4b71Sopenharmony_ci
67e41f4b71Sopenharmony_ci当WindowStage创建后调用。
68e41f4b71Sopenharmony_ci
69e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
70e41f4b71Sopenharmony_ci
71e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
72e41f4b71Sopenharmony_ci
73e41f4b71Sopenharmony_ci**参数:**
74e41f4b71Sopenharmony_ci
75e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
76e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
77e41f4b71Sopenharmony_ci| windowStage | [window.WindowStage](../apis-arkui/js-apis-window.md#windowstage9) | 是 | WindowStage相关信息。 |
78e41f4b71Sopenharmony_ci
79e41f4b71Sopenharmony_ci**示例:**
80e41f4b71Sopenharmony_ci
81e41f4b71Sopenharmony_ci```ts
82e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
83e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
84e41f4b71Sopenharmony_ci
85e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
86e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
87e41f4b71Sopenharmony_ci    console.log('onWindowStageCreate');
88e41f4b71Sopenharmony_ci  }
89e41f4b71Sopenharmony_ci}
90e41f4b71Sopenharmony_ci```
91e41f4b71Sopenharmony_ci
92e41f4b71Sopenharmony_ci
93e41f4b71Sopenharmony_ci## UIAbility.onWindowStageWillDestroy<sup>12+</sup>
94e41f4b71Sopenharmony_ci
95e41f4b71Sopenharmony_cionWindowStageWillDestroy(windowStage: window.WindowStage): void
96e41f4b71Sopenharmony_ci
97e41f4b71Sopenharmony_ci当WindowStage即将销毁时调用。
98e41f4b71Sopenharmony_ci
99e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 12开始,该接口支持在原子化服务中使用。
100e41f4b71Sopenharmony_ci
101e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
102e41f4b71Sopenharmony_ci
103e41f4b71Sopenharmony_ci**参数:**
104e41f4b71Sopenharmony_ci
105e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
106e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
107e41f4b71Sopenharmony_ci| windowStage | [window.WindowStage](../apis-arkui/js-apis-window.md#windowstage9) | 是 | WindowStage相关信息。 |
108e41f4b71Sopenharmony_ci
109e41f4b71Sopenharmony_ci**示例:**
110e41f4b71Sopenharmony_ci
111e41f4b71Sopenharmony_ci```ts
112e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
113e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
114e41f4b71Sopenharmony_ci
115e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
116e41f4b71Sopenharmony_ci  onWindowStageWillDestroy(windowStage: window.WindowStage) {
117e41f4b71Sopenharmony_ci    console.log('onWindowStageWillDestroy');
118e41f4b71Sopenharmony_ci  }
119e41f4b71Sopenharmony_ci}
120e41f4b71Sopenharmony_ci```
121e41f4b71Sopenharmony_ci
122e41f4b71Sopenharmony_ci
123e41f4b71Sopenharmony_ci## UIAbility.onWindowStageDestroy
124e41f4b71Sopenharmony_ci
125e41f4b71Sopenharmony_cionWindowStageDestroy(): void
126e41f4b71Sopenharmony_ci
127e41f4b71Sopenharmony_ci当WindowStage销毁后调用。
128e41f4b71Sopenharmony_ci
129e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
130e41f4b71Sopenharmony_ci
131e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
132e41f4b71Sopenharmony_ci
133e41f4b71Sopenharmony_ci**示例:**
134e41f4b71Sopenharmony_ci
135e41f4b71Sopenharmony_ci```ts
136e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
137e41f4b71Sopenharmony_ci
138e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
139e41f4b71Sopenharmony_ci  onWindowStageDestroy() {
140e41f4b71Sopenharmony_ci    console.log('onWindowStageDestroy');
141e41f4b71Sopenharmony_ci  }
142e41f4b71Sopenharmony_ci}
143e41f4b71Sopenharmony_ci```
144e41f4b71Sopenharmony_ci
145e41f4b71Sopenharmony_ci
146e41f4b71Sopenharmony_ci## UIAbility.onWindowStageRestore
147e41f4b71Sopenharmony_ci
148e41f4b71Sopenharmony_cionWindowStageRestore(windowStage: window.WindowStage): void
149e41f4b71Sopenharmony_ci
150e41f4b71Sopenharmony_ci当迁移多实例ability时,恢复WindowStage后调用。
151e41f4b71Sopenharmony_ci
152e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
153e41f4b71Sopenharmony_ci
154e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
155e41f4b71Sopenharmony_ci
156e41f4b71Sopenharmony_ci**参数:**
157e41f4b71Sopenharmony_ci
158e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
159e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
160e41f4b71Sopenharmony_ci| windowStage | [window.WindowStage](../apis-arkui/js-apis-window.md#windowstage9) | 是 | WindowStage相关信息。 |
161e41f4b71Sopenharmony_ci
162e41f4b71Sopenharmony_ci**示例:**
163e41f4b71Sopenharmony_ci
164e41f4b71Sopenharmony_ci```ts
165e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
166e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
167e41f4b71Sopenharmony_ci
168e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
169e41f4b71Sopenharmony_ci  onWindowStageRestore(windowStage: window.WindowStage) {
170e41f4b71Sopenharmony_ci    console.log('onWindowStageRestore');
171e41f4b71Sopenharmony_ci  }
172e41f4b71Sopenharmony_ci}
173e41f4b71Sopenharmony_ci```
174e41f4b71Sopenharmony_ci
175e41f4b71Sopenharmony_ci
176e41f4b71Sopenharmony_ci## UIAbility.onDestroy
177e41f4b71Sopenharmony_ci
178e41f4b71Sopenharmony_cionDestroy(): void | Promise&lt;void&gt;
179e41f4b71Sopenharmony_ci
180e41f4b71Sopenharmony_ciUIAbility生命周期回调,在销毁时回调,执行资源清理等操作。使用同步回调或Promise异步回调。
181e41f4b71Sopenharmony_ci
182e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
183e41f4b71Sopenharmony_ci
184e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
185e41f4b71Sopenharmony_ci
186e41f4b71Sopenharmony_ci**返回值:**
187e41f4b71Sopenharmony_ci
188e41f4b71Sopenharmony_ci| 类型 | 说明 |
189e41f4b71Sopenharmony_ci| -------- | -------- |
190e41f4b71Sopenharmony_ci| void&nbsp;\|&nbsp;Promise&lt;void&gt; | 无返回结果或无返回结果的Promise对象。 |
191e41f4b71Sopenharmony_ci
192e41f4b71Sopenharmony_ci**示例:**
193e41f4b71Sopenharmony_ci
194e41f4b71Sopenharmony_ci```ts
195e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
196e41f4b71Sopenharmony_ci
197e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
198e41f4b71Sopenharmony_ci  onDestroy() {
199e41f4b71Sopenharmony_ci    console.log('onDestroy');
200e41f4b71Sopenharmony_ci  }
201e41f4b71Sopenharmony_ci}
202e41f4b71Sopenharmony_ci```
203e41f4b71Sopenharmony_ci
204e41f4b71Sopenharmony_ci在执行完onDestroy生命周期回调后,应用可能会退出,从而可能导致onDestroy中的异步函数未能正确执行,比如异步写入数据库。可以使用异步生命周期,以确保异步onDestroy完成后再继续后续的生命周期。
205e41f4b71Sopenharmony_ci
206e41f4b71Sopenharmony_ci```ts
207e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
208e41f4b71Sopenharmony_ci
209e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
210e41f4b71Sopenharmony_ci  async onDestroy() {
211e41f4b71Sopenharmony_ci    console.log('onDestroy');
212e41f4b71Sopenharmony_ci    // 调用异步函数...
213e41f4b71Sopenharmony_ci  }
214e41f4b71Sopenharmony_ci}
215e41f4b71Sopenharmony_ci```
216e41f4b71Sopenharmony_ci
217e41f4b71Sopenharmony_ci## UIAbility.onForeground
218e41f4b71Sopenharmony_ci
219e41f4b71Sopenharmony_cionForeground(): void
220e41f4b71Sopenharmony_ci
221e41f4b71Sopenharmony_ciUIAbility生命周期回调,当应用从后台转到前台时触发。同步接口,不支持异步回调。
222e41f4b71Sopenharmony_ci
223e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
224e41f4b71Sopenharmony_ci
225e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
226e41f4b71Sopenharmony_ci
227e41f4b71Sopenharmony_ci**示例:**
228e41f4b71Sopenharmony_ci
229e41f4b71Sopenharmony_ci```ts
230e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
231e41f4b71Sopenharmony_ci
232e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
233e41f4b71Sopenharmony_ci  onForeground() {
234e41f4b71Sopenharmony_ci    console.log('onForeground');
235e41f4b71Sopenharmony_ci  }
236e41f4b71Sopenharmony_ci}
237e41f4b71Sopenharmony_ci```
238e41f4b71Sopenharmony_ci
239e41f4b71Sopenharmony_ci
240e41f4b71Sopenharmony_ci## UIAbility.onBackground
241e41f4b71Sopenharmony_ci
242e41f4b71Sopenharmony_cionBackground(): void
243e41f4b71Sopenharmony_ci
244e41f4b71Sopenharmony_ciUIAbility生命周期回调,当应用从前台转到后台时触发。同步接口,不支持异步回调。
245e41f4b71Sopenharmony_ci
246e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
247e41f4b71Sopenharmony_ci
248e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
249e41f4b71Sopenharmony_ci
250e41f4b71Sopenharmony_ci**示例:**
251e41f4b71Sopenharmony_ci
252e41f4b71Sopenharmony_ci```ts
253e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
254e41f4b71Sopenharmony_ci
255e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
256e41f4b71Sopenharmony_ci  onBackground() {
257e41f4b71Sopenharmony_ci    console.log('onBackground');
258e41f4b71Sopenharmony_ci  }
259e41f4b71Sopenharmony_ci}
260e41f4b71Sopenharmony_ci```
261e41f4b71Sopenharmony_ci
262e41f4b71Sopenharmony_ci
263e41f4b71Sopenharmony_ci## UIAbility.onContinue
264e41f4b71Sopenharmony_ci
265e41f4b71Sopenharmony_cionContinue(wantParam: Record&lt;string, Object&gt;): AbilityConstant.OnContinueResult | Promise&lt;AbilityConstant.OnContinueResult&gt;
266e41f4b71Sopenharmony_ci
267e41f4b71Sopenharmony_ci当Ability准备迁移时触发,保存数据。
268e41f4b71Sopenharmony_ci
269e41f4b71Sopenharmony_ci**说明:**
270e41f4b71Sopenharmony_ci> 
271e41f4b71Sopenharmony_ci> 从API version 12 开始,UIAbility.onContinue生命周期新增支持返回值为Promise\<[AbilityConstant.OnContinueResult](js-apis-app-ability-abilityConstant.md#oncontinueresult)\>形式。
272e41f4b71Sopenharmony_ci
273e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
274e41f4b71Sopenharmony_ci
275e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
276e41f4b71Sopenharmony_ci
277e41f4b71Sopenharmony_ci**参数:**
278e41f4b71Sopenharmony_ci
279e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
280e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
281e41f4b71Sopenharmony_ci| wantParam | Record&lt;string,&nbsp;Object&gt; | 是 | want相关参数。 |
282e41f4b71Sopenharmony_ci
283e41f4b71Sopenharmony_ci**返回值:**
284e41f4b71Sopenharmony_ci
285e41f4b71Sopenharmony_ci| 类型 | 说明 |
286e41f4b71Sopenharmony_ci| -------- | -------- |
287e41f4b71Sopenharmony_ci| [AbilityConstant.OnContinueResult](js-apis-app-ability-abilityConstant.md#oncontinueresult)&nbsp;\|&nbsp;Promise&lt;[AbilityConstant.OnContinueResult](js-apis-app-ability-abilityConstant.md#oncontinueresult)&gt;  | 接续的结果或带接续结果的Promise对象。 |
288e41f4b71Sopenharmony_ci
289e41f4b71Sopenharmony_ci**示例:**
290e41f4b71Sopenharmony_ci
291e41f4b71Sopenharmony_ci  ```ts
292e41f4b71Sopenharmony_ci  import { UIAbility, AbilityConstant } from '@kit.AbilityKit';
293e41f4b71Sopenharmony_ci
294e41f4b71Sopenharmony_ci  class MyUIAbility extends UIAbility {
295e41f4b71Sopenharmony_ci      onContinue(wantParams: Record<string, Object>) {
296e41f4b71Sopenharmony_ci          console.log('onContinue');
297e41f4b71Sopenharmony_ci          wantParams['myData'] = 'my1234567';
298e41f4b71Sopenharmony_ci          return AbilityConstant.OnContinueResult.AGREE;
299e41f4b71Sopenharmony_ci      }
300e41f4b71Sopenharmony_ci  }
301e41f4b71Sopenharmony_ci  ```
302e41f4b71Sopenharmony_ci
303e41f4b71Sopenharmony_ci支持应用在迁移时,使用异步接口进行数据保存。
304e41f4b71Sopenharmony_ci
305e41f4b71Sopenharmony_ci  ```ts
306e41f4b71Sopenharmony_ci  import { UIAbility, AbilityConstant } from '@kit.AbilityKit';
307e41f4b71Sopenharmony_ci
308e41f4b71Sopenharmony_ci  class MyUIAbility extends UIAbility {
309e41f4b71Sopenharmony_ci    async setWant(wantParams: Record<string, Object>) {
310e41f4b71Sopenharmony_ci      console.log('setWant start');
311e41f4b71Sopenharmony_ci      for (let time = 0; time < 1000; ++time) {
312e41f4b71Sopenharmony_ci        wantParams[time] = time;
313e41f4b71Sopenharmony_ci      }
314e41f4b71Sopenharmony_ci      console.log('setWant end');
315e41f4b71Sopenharmony_ci    }
316e41f4b71Sopenharmony_ci
317e41f4b71Sopenharmony_ci    async onContinue(wantParams: Record<string, Object>) {
318e41f4b71Sopenharmony_ci        console.log('onContinue');
319e41f4b71Sopenharmony_ci        return this.setWant(wantParams).then(()=>{
320e41f4b71Sopenharmony_ci          return AbilityConstant.OnContinueResult.AGREE;
321e41f4b71Sopenharmony_ci        });
322e41f4b71Sopenharmony_ci    }
323e41f4b71Sopenharmony_ci  }
324e41f4b71Sopenharmony_ci  ```
325e41f4b71Sopenharmony_ci
326e41f4b71Sopenharmony_ci
327e41f4b71Sopenharmony_ci## UIAbility.onNewWant
328e41f4b71Sopenharmony_ci
329e41f4b71Sopenharmony_cionNewWant(want: Want, launchParam: AbilityConstant.LaunchParam): void
330e41f4b71Sopenharmony_ci
331e41f4b71Sopenharmony_ciUIAbility实例已经启动并在前台运行过,由于某些原因切换到后台,再次启动该UIAbility实例时会回调执行该方法。即UIAbility实例[热启动](../../application-models/uiability-intra-device-interaction.md#目标uiability热启动)时进入该生命周期回调。
332e41f4b71Sopenharmony_ci
333e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
334e41f4b71Sopenharmony_ci
335e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
336e41f4b71Sopenharmony_ci
337e41f4b71Sopenharmony_ci**参数:**
338e41f4b71Sopenharmony_ci
339e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
340e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
341e41f4b71Sopenharmony_ci| want | [Want](js-apis-app-ability-want.md) | 是 | Want类型参数,如ability名称,包名等。 |
342e41f4b71Sopenharmony_ci| launchParam | [AbilityConstant.LaunchParam](js-apis-app-ability-abilityConstant.md#launchparam) | 是 | UIAbility启动的原因、上次异常退出的原因信息。 |
343e41f4b71Sopenharmony_ci
344e41f4b71Sopenharmony_ci**示例:**
345e41f4b71Sopenharmony_ci
346e41f4b71Sopenharmony_ci```ts
347e41f4b71Sopenharmony_ciimport { UIAbility, AbilityConstant, Want } from '@kit.AbilityKit';
348e41f4b71Sopenharmony_ci
349e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
350e41f4b71Sopenharmony_ci  onNewWant(want: Want, launchParam: AbilityConstant.LaunchParam) {
351e41f4b71Sopenharmony_ci    console.log(`onNewWant, want: ${want.abilityName}`);
352e41f4b71Sopenharmony_ci    console.log(`onNewWant, launchParam: ${JSON.stringify(launchParam)}`);
353e41f4b71Sopenharmony_ci  }
354e41f4b71Sopenharmony_ci}
355e41f4b71Sopenharmony_ci```
356e41f4b71Sopenharmony_ci
357e41f4b71Sopenharmony_ci## UIAbility.onDump
358e41f4b71Sopenharmony_ci
359e41f4b71Sopenharmony_cionDump(params: Array\<string>): Array\<string>
360e41f4b71Sopenharmony_ci
361e41f4b71Sopenharmony_ci转储客户端信息时调用,可用于转储非敏感信息。
362e41f4b71Sopenharmony_ci
363e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
364e41f4b71Sopenharmony_ci
365e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
366e41f4b71Sopenharmony_ci
367e41f4b71Sopenharmony_ci**参数:**
368e41f4b71Sopenharmony_ci
369e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
370e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
371e41f4b71Sopenharmony_ci| params | Array\<string> | 是 | 表示命令形式的参数。|
372e41f4b71Sopenharmony_ci
373e41f4b71Sopenharmony_ci**返回值:**
374e41f4b71Sopenharmony_ci
375e41f4b71Sopenharmony_ci| 类型 | 说明 |
376e41f4b71Sopenharmony_ci| -------- | -------- |
377e41f4b71Sopenharmony_ci| Array\<string> | 转储信息数组。|
378e41f4b71Sopenharmony_ci
379e41f4b71Sopenharmony_ci**示例:**
380e41f4b71Sopenharmony_ci
381e41f4b71Sopenharmony_ci```ts
382e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
383e41f4b71Sopenharmony_ci
384e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
385e41f4b71Sopenharmony_ci  onDump(params: Array<string>) {
386e41f4b71Sopenharmony_ci    console.log(`dump, params: ${JSON.stringify(params)}`);
387e41f4b71Sopenharmony_ci    return ['params'];
388e41f4b71Sopenharmony_ci  }
389e41f4b71Sopenharmony_ci}
390e41f4b71Sopenharmony_ci```
391e41f4b71Sopenharmony_ci
392e41f4b71Sopenharmony_ci
393e41f4b71Sopenharmony_ci## UIAbility.onSaveState
394e41f4b71Sopenharmony_ci
395e41f4b71Sopenharmony_cionSaveState(reason: AbilityConstant.StateType, wantParam: Record&lt;string, Object&gt;): AbilityConstant.OnSaveResult
396e41f4b71Sopenharmony_ci
397e41f4b71Sopenharmony_ci该API配合[appRecovery](js-apis-app-ability-appRecovery.md)使用。在应用故障时,如果使能了自动保存状态,框架将回调onSaveState保存UIAbility状态。
398e41f4b71Sopenharmony_ci
399e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
400e41f4b71Sopenharmony_ci
401e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
402e41f4b71Sopenharmony_ci
403e41f4b71Sopenharmony_ci**参数:**
404e41f4b71Sopenharmony_ci
405e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
406e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
407e41f4b71Sopenharmony_ci| reason | [AbilityConstant.StateType](js-apis-app-ability-abilityConstant.md#statetype) | 是 | 回调保存状态的原因。 |
408e41f4b71Sopenharmony_ci| wantParam | Record&lt;string,&nbsp;Object&gt; | 是 | want相关参数。 |
409e41f4b71Sopenharmony_ci
410e41f4b71Sopenharmony_ci**返回值:**
411e41f4b71Sopenharmony_ci
412e41f4b71Sopenharmony_ci| 类型 | 说明 |
413e41f4b71Sopenharmony_ci| -------- | -------- |
414e41f4b71Sopenharmony_ci| [AbilityConstant.OnSaveResult](js-apis-app-ability-abilityConstant.md#onsaveresult) | 是否同意保存当前UIAbility的状态。 |
415e41f4b71Sopenharmony_ci
416e41f4b71Sopenharmony_ci**示例:**
417e41f4b71Sopenharmony_ci
418e41f4b71Sopenharmony_ci```ts
419e41f4b71Sopenharmony_ciimport { UIAbility, AbilityConstant } from '@kit.AbilityKit';
420e41f4b71Sopenharmony_ci
421e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
422e41f4b71Sopenharmony_ci  onSaveState(reason: AbilityConstant.StateType, wantParam: Record<string, Object>) {
423e41f4b71Sopenharmony_ci    console.log('onSaveState');
424e41f4b71Sopenharmony_ci    wantParam['myData'] = 'my1234567';
425e41f4b71Sopenharmony_ci    return AbilityConstant.OnSaveResult.RECOVERY_AGREE;
426e41f4b71Sopenharmony_ci  }
427e41f4b71Sopenharmony_ci}
428e41f4b71Sopenharmony_ci```
429e41f4b71Sopenharmony_ci
430e41f4b71Sopenharmony_ci## UIAbility.onShare<sup>10+</sup>
431e41f4b71Sopenharmony_ci
432e41f4b71Sopenharmony_cionShare(wantParam: Record&lt;string, Object&gt;): void
433e41f4b71Sopenharmony_ci
434e41f4b71Sopenharmony_ci在跨端分享场景下,在UIAbility中设置分享方设备要分享的数据。
435e41f4b71Sopenharmony_ci
436e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
437e41f4b71Sopenharmony_ci
438e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
439e41f4b71Sopenharmony_ci
440e41f4b71Sopenharmony_ci**参数:**
441e41f4b71Sopenharmony_ci
442e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
443e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
444e41f4b71Sopenharmony_ci| wantParam | Record&lt;string,&nbsp;Object&gt; | 是 | 待分享的数据。 |
445e41f4b71Sopenharmony_ci
446e41f4b71Sopenharmony_ci**示例:**
447e41f4b71Sopenharmony_ci
448e41f4b71Sopenharmony_ci```ts
449e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
450e41f4b71Sopenharmony_ci
451e41f4b71Sopenharmony_ciclass MyUIAbility extends UIAbility {
452e41f4b71Sopenharmony_ci  onShare(wantParams: Record<string, Object>) {
453e41f4b71Sopenharmony_ci    console.log('onShare');
454e41f4b71Sopenharmony_ci    wantParams['ohos.extra.param.key.shareUrl'] = 'example.com';
455e41f4b71Sopenharmony_ci  }
456e41f4b71Sopenharmony_ci}
457e41f4b71Sopenharmony_ci```
458e41f4b71Sopenharmony_ci
459e41f4b71Sopenharmony_ci## UIAbility.onPrepareToTerminate<sup>10+</sup>
460e41f4b71Sopenharmony_ci
461e41f4b71Sopenharmony_cionPrepareToTerminate(): boolean
462e41f4b71Sopenharmony_ci
463e41f4b71Sopenharmony_ciUIAbility生命周期回调,当系统预关闭开关打开后(配置系统参数persist.sys.prepare_terminate为true打开),在UIAbility关闭时触发,可在回调中定义操作来决定是否继续执行关闭UIAbility的操作。如果UIAbility在退出时需要与用户交互确认是否关闭UIAbility,可在此生命周期回调中定义预关闭操作配合[terminateSelf](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextterminateself)接口退出,如弹窗确认是否关闭,并配置预关闭生命周期返回true取消正常关闭。
464e41f4b71Sopenharmony_ci
465e41f4b71Sopenharmony_ci**需要权限**:ohos.permission.PREPARE_APP_TERMINATE
466e41f4b71Sopenharmony_ci
467e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
468e41f4b71Sopenharmony_ci
469e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
470e41f4b71Sopenharmony_ci
471e41f4b71Sopenharmony_ci**返回值:**
472e41f4b71Sopenharmony_ci
473e41f4b71Sopenharmony_ci| 类型 | 说明 |
474e41f4b71Sopenharmony_ci| -- | -- |
475e41f4b71Sopenharmony_ci| boolean | 是否执行UIAbility关闭操作,返回true表示本次UIAbility关闭流程取消,不再退出,返回false表示UIAbility继续正常关闭。 |
476e41f4b71Sopenharmony_ci
477e41f4b71Sopenharmony_ci**示例:**
478e41f4b71Sopenharmony_ci
479e41f4b71Sopenharmony_ci```ts
480e41f4b71Sopenharmony_ciimport { UIAbility, Want } from '@kit.AbilityKit';
481e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
482e41f4b71Sopenharmony_ci
483e41f4b71Sopenharmony_ciexport default class EntryAbility extends UIAbility {
484e41f4b71Sopenharmony_ci  onPrepareToTerminate() {
485e41f4b71Sopenharmony_ci    // 开发者定义预关闭动作
486e41f4b71Sopenharmony_ci    // 例如拉起另一个ability,根据ability处理结果执行异步关闭
487e41f4b71Sopenharmony_ci    let want: Want = {
488e41f4b71Sopenharmony_ci      bundleName: "com.example.myapplication",
489e41f4b71Sopenharmony_ci      moduleName: "entry",
490e41f4b71Sopenharmony_ci      abilityName: "SecondAbility"
491e41f4b71Sopenharmony_ci    }
492e41f4b71Sopenharmony_ci    this.context.startAbilityForResult(want)
493e41f4b71Sopenharmony_ci      .then((result)=>{
494e41f4b71Sopenharmony_ci        // 获取ability处理结果,当返回结果的resultCode为0关闭当前UIAbility
495e41f4b71Sopenharmony_ci        console.log('startAbilityForResult success, resultCode is ' + result.resultCode);
496e41f4b71Sopenharmony_ci        if (result.resultCode === 0) {
497e41f4b71Sopenharmony_ci          this.context.terminateSelf();
498e41f4b71Sopenharmony_ci        }
499e41f4b71Sopenharmony_ci      }).catch((err: BusinessError)=>{
500e41f4b71Sopenharmony_ci      // 异常处理
501e41f4b71Sopenharmony_ci      console.error('startAbilityForResult failed, err:' + JSON.stringify(err));
502e41f4b71Sopenharmony_ci      this.context.terminateSelf();
503e41f4b71Sopenharmony_ci    })
504e41f4b71Sopenharmony_ci
505e41f4b71Sopenharmony_ci    return true; // 已定义预关闭操作后,返回true表示UIAbility取消关闭
506e41f4b71Sopenharmony_ci  }
507e41f4b71Sopenharmony_ci}
508e41f4b71Sopenharmony_ci```
509e41f4b71Sopenharmony_ci
510e41f4b71Sopenharmony_ci## UIAbility.onBackPressed<sup>10+</sup>
511e41f4b71Sopenharmony_ci
512e41f4b71Sopenharmony_cionBackPressed(): boolean
513e41f4b71Sopenharmony_ci
514e41f4b71Sopenharmony_ciUIAbility生命周期回调,当UIAbility侧滑返回时触发,根据返回值决定是否销毁UIAbility。
515e41f4b71Sopenharmony_ci
516e41f4b71Sopenharmony_ci- 当targetSdkVersion<12时,默认返回值为false,会销毁UIAbility。
517e41f4b71Sopenharmony_ci- 当targetSdkVersion>=12时,默认返回值为true,会将UIAbility移动到后台不销毁。
518e41f4b71Sopenharmony_ci
519e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 11开始,该接口支持在原子化服务中使用。
520e41f4b71Sopenharmony_ci
521e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
522e41f4b71Sopenharmony_ci
523e41f4b71Sopenharmony_ci**返回值:**
524e41f4b71Sopenharmony_ci
525e41f4b71Sopenharmony_ci| 类型 | 说明 |
526e41f4b71Sopenharmony_ci| -- | -- |
527e41f4b71Sopenharmony_ci| boolean | 返回true表示UIAbility将会被移到后台不销毁,返回false表示UIAbility将正常销毁。 |
528e41f4b71Sopenharmony_ci
529e41f4b71Sopenharmony_ci**示例:**
530e41f4b71Sopenharmony_ci
531e41f4b71Sopenharmony_ci```ts
532e41f4b71Sopenharmony_ciimport { UIAbility } from '@kit.AbilityKit';
533e41f4b71Sopenharmony_ci
534e41f4b71Sopenharmony_ciexport default class EntryAbility extends UIAbility {
535e41f4b71Sopenharmony_ci  onBackPressed() {
536e41f4b71Sopenharmony_ci    return true;
537e41f4b71Sopenharmony_ci  }
538e41f4b71Sopenharmony_ci}
539e41f4b71Sopenharmony_ci```
540e41f4b71Sopenharmony_ci
541e41f4b71Sopenharmony_ci## Caller
542e41f4b71Sopenharmony_ci
543e41f4b71Sopenharmony_ci通用组件Caller通信客户端调用接口, 用来向通用组件服务端发送约定数据。
544e41f4b71Sopenharmony_ci
545e41f4b71Sopenharmony_ci### Caller.call
546e41f4b71Sopenharmony_ci
547e41f4b71Sopenharmony_cicall(method: string, data: rpc.Parcelable): Promise&lt;void&gt;
548e41f4b71Sopenharmony_ci
549e41f4b71Sopenharmony_ci向通用组件服务端发送约定序列化数据。使用Promise异步回调。
550e41f4b71Sopenharmony_ci
551e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
552e41f4b71Sopenharmony_ci
553e41f4b71Sopenharmony_ci**参数:**
554e41f4b71Sopenharmony_ci
555e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
556e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
557e41f4b71Sopenharmony_ci| method | string | 是 | 约定的服务端注册事件字符串。 |
558e41f4b71Sopenharmony_ci| data | [rpc.Parcelable](../apis-ipc-kit/js-apis-rpc.md#parcelable9) | 是 | 由开发者实现的Parcelable可序列化数据。 |
559e41f4b71Sopenharmony_ci
560e41f4b71Sopenharmony_ci**返回值:**
561e41f4b71Sopenharmony_ci
562e41f4b71Sopenharmony_ci| 类型 | 说明 |
563e41f4b71Sopenharmony_ci| -------- | -------- |
564e41f4b71Sopenharmony_ci| Promise&lt;void&gt; | Promise对象。无返回结果的Promise对象。 |
565e41f4b71Sopenharmony_ci
566e41f4b71Sopenharmony_ci**错误码:**
567e41f4b71Sopenharmony_ci
568e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
569e41f4b71Sopenharmony_ci
570e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
571e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
572e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types. |
573e41f4b71Sopenharmony_ci| 16200001 | Caller released. The caller has been released. |
574e41f4b71Sopenharmony_ci| 16200002 | The callee does not exist. |
575e41f4b71Sopenharmony_ci| 16000050 | Internal error. |
576e41f4b71Sopenharmony_ci
577e41f4b71Sopenharmony_ci**示例:**
578e41f4b71Sopenharmony_ci
579e41f4b71Sopenharmony_ci```ts
580e41f4b71Sopenharmony_ciimport { UIAbility, Caller } from '@kit.AbilityKit';
581e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
582e41f4b71Sopenharmony_ciimport { rpc } from '@kit.IPCKit';
583e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
584e41f4b71Sopenharmony_ci
585e41f4b71Sopenharmony_ciclass MyMessageAble implements rpc.Parcelable { // 自定义的Parcelable数据结构
586e41f4b71Sopenharmony_ci  name: string
587e41f4b71Sopenharmony_ci  str: string
588e41f4b71Sopenharmony_ci  num: number = 1
589e41f4b71Sopenharmony_ci  constructor(name: string, str: string) {
590e41f4b71Sopenharmony_ci    this.name = name;
591e41f4b71Sopenharmony_ci    this.str = str;
592e41f4b71Sopenharmony_ci  }
593e41f4b71Sopenharmony_ci  marshalling(messageSequence: rpc.MessageSequence) {
594e41f4b71Sopenharmony_ci    messageSequence.writeInt(this.num);
595e41f4b71Sopenharmony_ci    messageSequence.writeString(this.str);
596e41f4b71Sopenharmony_ci    console.log(`MyMessageAble marshalling num[${this.num}] str[${this.str}]`);
597e41f4b71Sopenharmony_ci    return true;
598e41f4b71Sopenharmony_ci  }
599e41f4b71Sopenharmony_ci  unmarshalling(messageSequence: rpc.MessageSequence) {
600e41f4b71Sopenharmony_ci    this.num = messageSequence.readInt();
601e41f4b71Sopenharmony_ci    this.str = messageSequence.readString();
602e41f4b71Sopenharmony_ci    console.log(`MyMessageAble unmarshalling num[${this.num}] str[${this.str}]`);
603e41f4b71Sopenharmony_ci    return true;
604e41f4b71Sopenharmony_ci  }
605e41f4b71Sopenharmony_ci};
606e41f4b71Sopenharmony_cilet method = 'call_Function'; // 约定的通知消息字符串
607e41f4b71Sopenharmony_cilet caller: Caller;
608e41f4b71Sopenharmony_ci
609e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
610e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
611e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
612e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
613e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
614e41f4b71Sopenharmony_ci      deviceId: ''
615e41f4b71Sopenharmony_ci    }).then((obj) => {
616e41f4b71Sopenharmony_ci      caller = obj;
617e41f4b71Sopenharmony_ci      let msg = new MyMessageAble('msg', 'world'); // 参考Parcelable数据定义
618e41f4b71Sopenharmony_ci      caller.call(method, msg)
619e41f4b71Sopenharmony_ci        .then(() => {
620e41f4b71Sopenharmony_ci          console.log('Caller call() called');
621e41f4b71Sopenharmony_ci        })
622e41f4b71Sopenharmony_ci        .catch((callErr: BusinessError) => {
623e41f4b71Sopenharmony_ci          console.error(`Caller.call catch error, error.code: ${callErr.code}, error.message: ${callErr.message}`);
624e41f4b71Sopenharmony_ci        });
625e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
626e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${err.code}, error.message: ${err.message}`);
627e41f4b71Sopenharmony_ci    });
628e41f4b71Sopenharmony_ci  }
629e41f4b71Sopenharmony_ci}
630e41f4b71Sopenharmony_ci```
631e41f4b71Sopenharmony_ci
632e41f4b71Sopenharmony_ci
633e41f4b71Sopenharmony_ci### Caller.callWithResult
634e41f4b71Sopenharmony_ci
635e41f4b71Sopenharmony_cicallWithResult(method: string, data: rpc.Parcelable): Promise&lt;rpc.MessageSequence&gt;
636e41f4b71Sopenharmony_ci
637e41f4b71Sopenharmony_ci向通用组件服务端发送约定序列化数据, 并将服务端返回的约定序列化数据带回。使用Promise异步回调。
638e41f4b71Sopenharmony_ci
639e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
640e41f4b71Sopenharmony_ci
641e41f4b71Sopenharmony_ci**参数:**
642e41f4b71Sopenharmony_ci
643e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
644e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
645e41f4b71Sopenharmony_ci| method | string | 是 | 约定的服务端注册事件字符串。 |
646e41f4b71Sopenharmony_ci| data | [rpc.Parcelable](../apis-ipc-kit/js-apis-rpc.md#parcelable9) | 是 | 由开发者实现的Parcelable可序列化数据。 |
647e41f4b71Sopenharmony_ci
648e41f4b71Sopenharmony_ci**返回值:**
649e41f4b71Sopenharmony_ci
650e41f4b71Sopenharmony_ci| 类型 | 说明 |
651e41f4b71Sopenharmony_ci| -------- | -------- |
652e41f4b71Sopenharmony_ci| Promise&lt;[rpc.MessageSequence](../apis-ipc-kit/js-apis-rpc.md#messagesequence9)&gt; | Promise对象,返回通用组件服务端应答数据。 |
653e41f4b71Sopenharmony_ci
654e41f4b71Sopenharmony_ci**错误码:**
655e41f4b71Sopenharmony_ci
656e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
657e41f4b71Sopenharmony_ci
658e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
659e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
660e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types. |
661e41f4b71Sopenharmony_ci| 16200001 | Caller released. The caller has been released. |
662e41f4b71Sopenharmony_ci| 16200002 | The callee does not exist. |
663e41f4b71Sopenharmony_ci| 16000050 | Internal error. |
664e41f4b71Sopenharmony_ci
665e41f4b71Sopenharmony_ci**示例:**
666e41f4b71Sopenharmony_ci
667e41f4b71Sopenharmony_ci```ts
668e41f4b71Sopenharmony_ciimport { UIAbility, Caller } from '@kit.AbilityKit';
669e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
670e41f4b71Sopenharmony_ciimport { rpc } from '@kit.IPCKit';
671e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
672e41f4b71Sopenharmony_ci
673e41f4b71Sopenharmony_ciclass MyMessageAble implements rpc.Parcelable {
674e41f4b71Sopenharmony_ci  name: string
675e41f4b71Sopenharmony_ci  str: string
676e41f4b71Sopenharmony_ci  num: number = 1
677e41f4b71Sopenharmony_ci  constructor(name: string, str: string) {
678e41f4b71Sopenharmony_ci    this.name = name;
679e41f4b71Sopenharmony_ci    this.str = str;
680e41f4b71Sopenharmony_ci  }
681e41f4b71Sopenharmony_ci  marshalling(messageSequence: rpc.MessageSequence) {
682e41f4b71Sopenharmony_ci    messageSequence.writeInt(this.num);
683e41f4b71Sopenharmony_ci    messageSequence.writeString(this.str);
684e41f4b71Sopenharmony_ci    console.log(`MyMessageAble marshalling num[${this.num}] str[${this.str}]`);
685e41f4b71Sopenharmony_ci    return true;
686e41f4b71Sopenharmony_ci  }
687e41f4b71Sopenharmony_ci  unmarshalling(messageSequence: rpc.MessageSequence) {
688e41f4b71Sopenharmony_ci    this.num = messageSequence.readInt();
689e41f4b71Sopenharmony_ci    this.str = messageSequence.readString();
690e41f4b71Sopenharmony_ci    console.log(`MyMessageAble unmarshalling num[${this.num}] str[${this.str}]`);
691e41f4b71Sopenharmony_ci    return true;
692e41f4b71Sopenharmony_ci  }
693e41f4b71Sopenharmony_ci};
694e41f4b71Sopenharmony_cilet method = 'call_Function';
695e41f4b71Sopenharmony_cilet caller: Caller;
696e41f4b71Sopenharmony_ci
697e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
698e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
699e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
700e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
701e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
702e41f4b71Sopenharmony_ci      deviceId: ''
703e41f4b71Sopenharmony_ci    }).then((obj) => {
704e41f4b71Sopenharmony_ci      caller = obj;
705e41f4b71Sopenharmony_ci      let msg = new MyMessageAble('msg', 'world');
706e41f4b71Sopenharmony_ci      caller.callWithResult(method, msg)
707e41f4b71Sopenharmony_ci        .then((data) => {
708e41f4b71Sopenharmony_ci          console.log('Caller callWithResult() called');
709e41f4b71Sopenharmony_ci          let retmsg = new MyMessageAble('msg', 'world');
710e41f4b71Sopenharmony_ci          data.readParcelable(retmsg);
711e41f4b71Sopenharmony_ci        })
712e41f4b71Sopenharmony_ci        .catch((callErr: BusinessError) => {
713e41f4b71Sopenharmony_ci          console.error(`Caller.callWithResult catch error, error.code: ${callErr.code}, error.message: ${callErr.message}`);
714e41f4b71Sopenharmony_ci        });
715e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
716e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${err.code}, error.message: ${err.message}`);
717e41f4b71Sopenharmony_ci    });
718e41f4b71Sopenharmony_ci  }
719e41f4b71Sopenharmony_ci}
720e41f4b71Sopenharmony_ci```
721e41f4b71Sopenharmony_ci
722e41f4b71Sopenharmony_ci
723e41f4b71Sopenharmony_ci### Caller.release
724e41f4b71Sopenharmony_ci
725e41f4b71Sopenharmony_cirelease(): void
726e41f4b71Sopenharmony_ci
727e41f4b71Sopenharmony_ci主动释放通用组件服务端的通信接口。
728e41f4b71Sopenharmony_ci
729e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
730e41f4b71Sopenharmony_ci
731e41f4b71Sopenharmony_ci**错误码:**
732e41f4b71Sopenharmony_ci
733e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[元能力子系统错误码](errorcode-ability.md)。
734e41f4b71Sopenharmony_ci
735e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
736e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
737e41f4b71Sopenharmony_ci| 16200001 | Caller released. The caller has been released. |
738e41f4b71Sopenharmony_ci| 16200002 | The callee does not exist. |
739e41f4b71Sopenharmony_ci
740e41f4b71Sopenharmony_ci**示例:**
741e41f4b71Sopenharmony_ci
742e41f4b71Sopenharmony_ci```ts
743e41f4b71Sopenharmony_ciimport { UIAbility, Caller } from '@kit.AbilityKit';
744e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
745e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
746e41f4b71Sopenharmony_ci
747e41f4b71Sopenharmony_cilet caller: Caller;
748e41f4b71Sopenharmony_ci
749e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
750e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
751e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
752e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
753e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
754e41f4b71Sopenharmony_ci      deviceId: ''
755e41f4b71Sopenharmony_ci    }).then((obj) => {
756e41f4b71Sopenharmony_ci      caller = obj;
757e41f4b71Sopenharmony_ci      try {
758e41f4b71Sopenharmony_ci        caller.release();
759e41f4b71Sopenharmony_ci      } catch (releaseErr) {
760e41f4b71Sopenharmony_ci        console.error(`Caller.release catch error, error.code: ${releaseErr.code}, error.message: ${releaseErr.message}`);
761e41f4b71Sopenharmony_ci      }
762e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
763e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${err.code}, error.message: ${err.message}`);
764e41f4b71Sopenharmony_ci    });
765e41f4b71Sopenharmony_ci  }
766e41f4b71Sopenharmony_ci}
767e41f4b71Sopenharmony_ci```
768e41f4b71Sopenharmony_ci
769e41f4b71Sopenharmony_ci### Caller.onRelease
770e41f4b71Sopenharmony_ci
771e41f4b71Sopenharmony_ci onRelease(callback: OnReleaseCallback): void
772e41f4b71Sopenharmony_ci
773e41f4b71Sopenharmony_ci注册通用组件服务端Stub(桩)断开监听通知。使用callback异步回调。
774e41f4b71Sopenharmony_ci
775e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
776e41f4b71Sopenharmony_ci
777e41f4b71Sopenharmony_ci**参数:**
778e41f4b71Sopenharmony_ci
779e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
780e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
781e41f4b71Sopenharmony_ci| callback | [OnReleaseCallback](#onreleasecallback) | 是 | 回调函数,返回onRelease回调结果。 |
782e41f4b71Sopenharmony_ci
783e41f4b71Sopenharmony_ci**错误码:**
784e41f4b71Sopenharmony_ci
785e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
786e41f4b71Sopenharmony_ci
787e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
788e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
789e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types. |
790e41f4b71Sopenharmony_ci| 16200001 | Caller released. The caller has been released. |
791e41f4b71Sopenharmony_ci
792e41f4b71Sopenharmony_ci**示例:**
793e41f4b71Sopenharmony_ci
794e41f4b71Sopenharmony_ci```ts
795e41f4b71Sopenharmony_ciimport { UIAbility, Caller } from '@kit.AbilityKit';
796e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
797e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
798e41f4b71Sopenharmony_ci
799e41f4b71Sopenharmony_cilet caller: Caller;
800e41f4b71Sopenharmony_ci
801e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
802e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
803e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
804e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
805e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
806e41f4b71Sopenharmony_ci      deviceId: ''
807e41f4b71Sopenharmony_ci    }).then((obj) => {
808e41f4b71Sopenharmony_ci      caller = obj;
809e41f4b71Sopenharmony_ci      try {
810e41f4b71Sopenharmony_ci        caller.onRelease((str) => {
811e41f4b71Sopenharmony_ci          console.log(`Caller OnRelease CallBack is called ${str}`);
812e41f4b71Sopenharmony_ci        });
813e41f4b71Sopenharmony_ci      } catch (error) {
814e41f4b71Sopenharmony_ci        console.error(`Caller.onRelease catch error, error.code: $error.code}, error.message: ${error.message}`);
815e41f4b71Sopenharmony_ci      }
816e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
817e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${err.code}, error.message: ${err.message}`);
818e41f4b71Sopenharmony_ci    });
819e41f4b71Sopenharmony_ci  }
820e41f4b71Sopenharmony_ci}
821e41f4b71Sopenharmony_ci```
822e41f4b71Sopenharmony_ci
823e41f4b71Sopenharmony_ci### Caller.onRemoteStateChange<sup>10+</sup>
824e41f4b71Sopenharmony_ci
825e41f4b71Sopenharmony_cionRemoteStateChange(callback: OnRemoteStateChangeCallback): void
826e41f4b71Sopenharmony_ci
827e41f4b71Sopenharmony_ci注册协同场景下跨设备组件状态变化监听通知。使用callback异步回调。
828e41f4b71Sopenharmony_ci
829e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
830e41f4b71Sopenharmony_ci
831e41f4b71Sopenharmony_ci**参数:**
832e41f4b71Sopenharmony_ci
833e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
834e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
835e41f4b71Sopenharmony_ci| callback | [OnRemoteStateChangeCallback](#onremotestatechangecallback10) | 是 | 回调函数,返回onRemoteStateChange回调结果。 |
836e41f4b71Sopenharmony_ci
837e41f4b71Sopenharmony_ci**错误码:**
838e41f4b71Sopenharmony_ci
839e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
840e41f4b71Sopenharmony_ci
841e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
842e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
843e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types. |
844e41f4b71Sopenharmony_ci| 16200001 | Caller released. The caller has been released. |
845e41f4b71Sopenharmony_ci
846e41f4b71Sopenharmony_ci**示例:**
847e41f4b71Sopenharmony_ci
848e41f4b71Sopenharmony_ci```ts
849e41f4b71Sopenharmony_ciimport { UIAbility, Caller } from '@kit.AbilityKit';
850e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
851e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
852e41f4b71Sopenharmony_ci
853e41f4b71Sopenharmony_cilet caller: Caller;
854e41f4b71Sopenharmony_cilet dstDeviceId: string;
855e41f4b71Sopenharmony_ci
856e41f4b71Sopenharmony_ciexport default class MainAbility extends UIAbility {
857e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
858e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
859e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
860e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
861e41f4b71Sopenharmony_ci      deviceId: dstDeviceId
862e41f4b71Sopenharmony_ci    }).then((obj) => {
863e41f4b71Sopenharmony_ci      caller = obj;
864e41f4b71Sopenharmony_ci      try {
865e41f4b71Sopenharmony_ci        caller.onRemoteStateChange((str) => {
866e41f4b71Sopenharmony_ci          console.log('Remote state changed ' + str);
867e41f4b71Sopenharmony_ci        });
868e41f4b71Sopenharmony_ci      } catch (error) {
869e41f4b71Sopenharmony_ci        console.error(`Caller.onRemoteStateChange catch error, error.code: ${JSON.stringify(error.code)}, error.message: ${JSON.stringify(error.message)}`);
870e41f4b71Sopenharmony_ci      }
871e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
872e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${JSON.stringify(err.code)}, error.message: ${JSON.stringify(err.message)}`);
873e41f4b71Sopenharmony_ci    })
874e41f4b71Sopenharmony_ci  }
875e41f4b71Sopenharmony_ci}
876e41f4b71Sopenharmony_ci```
877e41f4b71Sopenharmony_ci
878e41f4b71Sopenharmony_ci### Caller.on('release')
879e41f4b71Sopenharmony_ci
880e41f4b71Sopenharmony_cion(type: 'release', callback: OnReleaseCallback): void
881e41f4b71Sopenharmony_ci
882e41f4b71Sopenharmony_ci注册通用组件服务端Stub(桩)断开监听通知。使用callback异步回调。
883e41f4b71Sopenharmony_ci
884e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
885e41f4b71Sopenharmony_ci
886e41f4b71Sopenharmony_ci**参数:**
887e41f4b71Sopenharmony_ci
888e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
889e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
890e41f4b71Sopenharmony_ci| type | string | 是 | 监听releaseCall事件,固定为'release'。 |
891e41f4b71Sopenharmony_ci| callback | [OnReleaseCallback](#onreleasecallback) | 是 | 回调函数,返回on回调结果。 |
892e41f4b71Sopenharmony_ci
893e41f4b71Sopenharmony_ci**错误码:**
894e41f4b71Sopenharmony_ci
895e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
896e41f4b71Sopenharmony_ci
897e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
898e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
899e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed. |
900e41f4b71Sopenharmony_ci| 16200001 | Caller released. The caller has been released. |
901e41f4b71Sopenharmony_ci
902e41f4b71Sopenharmony_ci**示例:**
903e41f4b71Sopenharmony_ci
904e41f4b71Sopenharmony_ci```ts
905e41f4b71Sopenharmony_ciimport { UIAbility, Caller } from '@kit.AbilityKit';
906e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
907e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
908e41f4b71Sopenharmony_ci
909e41f4b71Sopenharmony_cilet caller: Caller;
910e41f4b71Sopenharmony_ci
911e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
912e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
913e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
914e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
915e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
916e41f4b71Sopenharmony_ci      deviceId: ''
917e41f4b71Sopenharmony_ci    }).then((obj) => {
918e41f4b71Sopenharmony_ci      caller = obj;
919e41f4b71Sopenharmony_ci      try {
920e41f4b71Sopenharmony_ci        caller.on('release', (str) => {
921e41f4b71Sopenharmony_ci          console.log(`Caller OnRelease CallBack is called ${str}`);
922e41f4b71Sopenharmony_ci        });
923e41f4b71Sopenharmony_ci      } catch (error) {
924e41f4b71Sopenharmony_ci        console.error(`Caller.on catch error, error.code: ${error.code}, error.message: ${error.message}`);
925e41f4b71Sopenharmony_ci      }
926e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
927e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${err.code}, error.message: ${err.message}`);
928e41f4b71Sopenharmony_ci    });
929e41f4b71Sopenharmony_ci  }
930e41f4b71Sopenharmony_ci}
931e41f4b71Sopenharmony_ci```
932e41f4b71Sopenharmony_ci
933e41f4b71Sopenharmony_ci### Caller.off('release')
934e41f4b71Sopenharmony_ci
935e41f4b71Sopenharmony_cioff(type: 'release', callback: OnReleaseCallback): void
936e41f4b71Sopenharmony_ci
937e41f4b71Sopenharmony_ci取消注册通用组件服务端Stub(桩)断开监听通知。预留能力,当前暂未支持。使用callback异步回调。
938e41f4b71Sopenharmony_ci
939e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
940e41f4b71Sopenharmony_ci
941e41f4b71Sopenharmony_ci**参数:**
942e41f4b71Sopenharmony_ci
943e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
944e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
945e41f4b71Sopenharmony_ci| type | string | 是 | 监听releaseCall事件,固定为'release'。 |
946e41f4b71Sopenharmony_ci| callback | [OnReleaseCallback](#onreleasecallback) | 是 | 回调函数,返回off回调结果。 |
947e41f4b71Sopenharmony_ci
948e41f4b71Sopenharmony_ci**错误码:**
949e41f4b71Sopenharmony_ci
950e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)。
951e41f4b71Sopenharmony_ci
952e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
953e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
954e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed. |
955e41f4b71Sopenharmony_ci
956e41f4b71Sopenharmony_ci**示例:**
957e41f4b71Sopenharmony_ci
958e41f4b71Sopenharmony_ci```ts
959e41f4b71Sopenharmony_ciimport { UIAbility, Caller, OnReleaseCallback } from '@kit.AbilityKit';
960e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
961e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
962e41f4b71Sopenharmony_ci
963e41f4b71Sopenharmony_cilet caller: Caller;
964e41f4b71Sopenharmony_ci
965e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
966e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
967e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
968e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
969e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
970e41f4b71Sopenharmony_ci      deviceId: ''
971e41f4b71Sopenharmony_ci    }).then((obj) => {
972e41f4b71Sopenharmony_ci      caller = obj;
973e41f4b71Sopenharmony_ci      try {
974e41f4b71Sopenharmony_ci        let onReleaseCallBack: OnReleaseCallback = (str) => {
975e41f4b71Sopenharmony_ci          console.log(`Caller OnRelease CallBack is called ${str}`);
976e41f4b71Sopenharmony_ci        };
977e41f4b71Sopenharmony_ci        caller.on('release', onReleaseCallBack);
978e41f4b71Sopenharmony_ci        caller.off('release', onReleaseCallBack);
979e41f4b71Sopenharmony_ci      } catch (error) {
980e41f4b71Sopenharmony_ci        console.error(`Caller.on or Caller.off catch error, error.code: ${error.code}, error.message: ${error.message}`);
981e41f4b71Sopenharmony_ci      }
982e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
983e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${err.code}, error.message: ${err.message}`);
984e41f4b71Sopenharmony_ci    });
985e41f4b71Sopenharmony_ci  }
986e41f4b71Sopenharmony_ci}
987e41f4b71Sopenharmony_ci```
988e41f4b71Sopenharmony_ci
989e41f4b71Sopenharmony_ci### Caller.off('release')
990e41f4b71Sopenharmony_ci
991e41f4b71Sopenharmony_cioff(type: 'release'): void
992e41f4b71Sopenharmony_ci
993e41f4b71Sopenharmony_ci取消注册通用组件服务端Stub(桩)断开监听通知。预留能力,当前暂未支持。
994e41f4b71Sopenharmony_ci
995e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
996e41f4b71Sopenharmony_ci
997e41f4b71Sopenharmony_ci**参数:**
998e41f4b71Sopenharmony_ci
999e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
1000e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
1001e41f4b71Sopenharmony_ci| type | string | 是 | 监听releaseCall事件,固定为'release'。 |
1002e41f4b71Sopenharmony_ci
1003e41f4b71Sopenharmony_ci**错误码:**
1004e41f4b71Sopenharmony_ci
1005e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)。
1006e41f4b71Sopenharmony_ci
1007e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
1008e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
1009e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed. |
1010e41f4b71Sopenharmony_ci
1011e41f4b71Sopenharmony_ci**示例:**
1012e41f4b71Sopenharmony_ci
1013e41f4b71Sopenharmony_ci```ts
1014e41f4b71Sopenharmony_ciimport { UIAbility, Caller, OnReleaseCallback } from '@kit.AbilityKit';
1015e41f4b71Sopenharmony_ciimport { window } from '@kit.ArkUI';
1016e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
1017e41f4b71Sopenharmony_ci
1018e41f4b71Sopenharmony_cilet caller: Caller;
1019e41f4b71Sopenharmony_ci
1020e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
1021e41f4b71Sopenharmony_ci  onWindowStageCreate(windowStage: window.WindowStage) {
1022e41f4b71Sopenharmony_ci    this.context.startAbilityByCall({
1023e41f4b71Sopenharmony_ci      bundleName: 'com.example.myservice',
1024e41f4b71Sopenharmony_ci      abilityName: 'MainUIAbility',
1025e41f4b71Sopenharmony_ci      deviceId: ''
1026e41f4b71Sopenharmony_ci    }).then((obj) => {
1027e41f4b71Sopenharmony_ci      caller = obj;
1028e41f4b71Sopenharmony_ci      try {
1029e41f4b71Sopenharmony_ci        let onReleaseCallBack: OnReleaseCallback = (str) => {
1030e41f4b71Sopenharmony_ci          console.log(`Caller OnRelease CallBack is called ${str}`);
1031e41f4b71Sopenharmony_ci        };
1032e41f4b71Sopenharmony_ci        caller.on('release', onReleaseCallBack);
1033e41f4b71Sopenharmony_ci        caller.off('release');
1034e41f4b71Sopenharmony_ci      } catch (error) {
1035e41f4b71Sopenharmony_ci        console.error(`Caller.on or Caller.off catch error, error.code: ${error.code}, error.message: ${error.message}`);
1036e41f4b71Sopenharmony_ci      }
1037e41f4b71Sopenharmony_ci    }).catch((err: BusinessError) => {
1038e41f4b71Sopenharmony_ci      console.error(`Caller GetCaller error, error.code: ${err.code}, error.message: ${err.message}`);
1039e41f4b71Sopenharmony_ci    });
1040e41f4b71Sopenharmony_ci  }
1041e41f4b71Sopenharmony_ci}
1042e41f4b71Sopenharmony_ci```
1043e41f4b71Sopenharmony_ci
1044e41f4b71Sopenharmony_ci## Callee
1045e41f4b71Sopenharmony_ci
1046e41f4b71Sopenharmony_ci通用组件服务端注册和解除客户端caller通知送信的callback接口。
1047e41f4b71Sopenharmony_ci
1048e41f4b71Sopenharmony_ci### Callee.on
1049e41f4b71Sopenharmony_ci
1050e41f4b71Sopenharmony_cion(method: string, callback: CalleeCallback): void
1051e41f4b71Sopenharmony_ci
1052e41f4b71Sopenharmony_ci通用组件服务端注册消息通知callback。
1053e41f4b71Sopenharmony_ci
1054e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
1055e41f4b71Sopenharmony_ci
1056e41f4b71Sopenharmony_ci**参数:**
1057e41f4b71Sopenharmony_ci
1058e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
1059e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
1060e41f4b71Sopenharmony_ci| method | string | 是 | 与客户端约定的通知消息字符串。 |
1061e41f4b71Sopenharmony_ci| callback | [CalleeCallback](#calleecallback) | 是 | 一个[rpc.MessageSequence](../apis-ipc-kit/js-apis-rpc.md#messagesequence9)类型入参的js通知同步回调函数,&nbsp;回调函数至少要返回一个空的[rpc.Parcelable](../apis-ipc-kit/js-apis-rpc.md#parcelable9)数据对象,&nbsp;其他视为函数执行错误。 |
1062e41f4b71Sopenharmony_ci
1063e41f4b71Sopenharmony_ci**错误码:**
1064e41f4b71Sopenharmony_ci
1065e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
1066e41f4b71Sopenharmony_ci
1067e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
1068e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
1069e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed. |
1070e41f4b71Sopenharmony_ci| 16200004 | The method has been registered. |
1071e41f4b71Sopenharmony_ci| 16000050 | Internal error. |
1072e41f4b71Sopenharmony_ci
1073e41f4b71Sopenharmony_ci**示例:**
1074e41f4b71Sopenharmony_ci
1075e41f4b71Sopenharmony_ci```ts
1076e41f4b71Sopenharmony_ciimport { UIAbility, AbilityConstant, Want } from '@kit.AbilityKit';
1077e41f4b71Sopenharmony_ciimport { rpc } from '@kit.IPCKit';
1078e41f4b71Sopenharmony_ci
1079e41f4b71Sopenharmony_ciclass MyMessageAble implements rpc.Parcelable {
1080e41f4b71Sopenharmony_ci  name: string
1081e41f4b71Sopenharmony_ci  str: string
1082e41f4b71Sopenharmony_ci  num: number = 1
1083e41f4b71Sopenharmony_ci  constructor(name: string, str: string) {
1084e41f4b71Sopenharmony_ci    this.name = name;
1085e41f4b71Sopenharmony_ci    this.str = str;
1086e41f4b71Sopenharmony_ci  }
1087e41f4b71Sopenharmony_ci  marshalling(messageSequence: rpc.MessageSequence) {
1088e41f4b71Sopenharmony_ci    messageSequence.writeInt(this.num);
1089e41f4b71Sopenharmony_ci    messageSequence.writeString(this.str);
1090e41f4b71Sopenharmony_ci    console.log(`MyMessageAble marshalling num[${this.num}] str[${this.str}]`);
1091e41f4b71Sopenharmony_ci    return true;
1092e41f4b71Sopenharmony_ci  }
1093e41f4b71Sopenharmony_ci  unmarshalling(messageSequence: rpc.MessageSequence) {
1094e41f4b71Sopenharmony_ci    this.num = messageSequence.readInt();
1095e41f4b71Sopenharmony_ci    this.str = messageSequence.readString();
1096e41f4b71Sopenharmony_ci    console.log(`MyMessageAble unmarshalling num[${this.num}] str[${this.str}]`);
1097e41f4b71Sopenharmony_ci    return true;
1098e41f4b71Sopenharmony_ci  }
1099e41f4b71Sopenharmony_ci};
1100e41f4b71Sopenharmony_cilet method = 'call_Function';
1101e41f4b71Sopenharmony_ci
1102e41f4b71Sopenharmony_cifunction funcCallBack(pdata: rpc.MessageSequence) {
1103e41f4b71Sopenharmony_ci  console.log(`Callee funcCallBack is called ${pdata}`);
1104e41f4b71Sopenharmony_ci  let msg = new MyMessageAble('test', '');
1105e41f4b71Sopenharmony_ci  pdata.readParcelable(msg);
1106e41f4b71Sopenharmony_ci  return new MyMessageAble('test1', 'Callee test');
1107e41f4b71Sopenharmony_ci}
1108e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
1109e41f4b71Sopenharmony_ci  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {
1110e41f4b71Sopenharmony_ci    console.log('Callee onCreate is called');
1111e41f4b71Sopenharmony_ci    try {
1112e41f4b71Sopenharmony_ci      this.callee.on(method, funcCallBack);
1113e41f4b71Sopenharmony_ci    } catch (error) {
1114e41f4b71Sopenharmony_ci      console.error(`Callee.on catch error, error.code: ${error.code}, error.message: ${error.message}`);
1115e41f4b71Sopenharmony_ci    }
1116e41f4b71Sopenharmony_ci  }
1117e41f4b71Sopenharmony_ci}
1118e41f4b71Sopenharmony_ci```
1119e41f4b71Sopenharmony_ci
1120e41f4b71Sopenharmony_ci### Callee.off
1121e41f4b71Sopenharmony_ci
1122e41f4b71Sopenharmony_cioff(method: string): void
1123e41f4b71Sopenharmony_ci
1124e41f4b71Sopenharmony_ci解除通用组件服务端注册消息通知callback。
1125e41f4b71Sopenharmony_ci
1126e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
1127e41f4b71Sopenharmony_ci
1128e41f4b71Sopenharmony_ci**参数:**
1129e41f4b71Sopenharmony_ci
1130e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
1131e41f4b71Sopenharmony_ci| -------- | -------- | -------- | -------- |
1132e41f4b71Sopenharmony_ci| method | string | 是 | 已注册的通知事件字符串。 |
1133e41f4b71Sopenharmony_ci
1134e41f4b71Sopenharmony_ci**错误码:**
1135e41f4b71Sopenharmony_ci
1136e41f4b71Sopenharmony_ci以下错误码详细介绍请参考[通用错误码](../errorcode-universal.md)和[元能力子系统错误码](errorcode-ability.md)。
1137e41f4b71Sopenharmony_ci
1138e41f4b71Sopenharmony_ci| 错误码ID | 错误信息 |
1139e41f4b71Sopenharmony_ci| ------- | -------------------------------- |
1140e41f4b71Sopenharmony_ci| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed. |
1141e41f4b71Sopenharmony_ci| 16200005 | The method has not been registered. |
1142e41f4b71Sopenharmony_ci| 16000050 | Internal error. |
1143e41f4b71Sopenharmony_ci
1144e41f4b71Sopenharmony_ci**示例:**
1145e41f4b71Sopenharmony_ci
1146e41f4b71Sopenharmony_ci```ts
1147e41f4b71Sopenharmony_ciimport { UIAbility, AbilityConstant, Want } from '@kit.AbilityKit';
1148e41f4b71Sopenharmony_ci
1149e41f4b71Sopenharmony_cilet method = 'call_Function';
1150e41f4b71Sopenharmony_ci
1151e41f4b71Sopenharmony_ciexport default class MainUIAbility extends UIAbility {
1152e41f4b71Sopenharmony_ci  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {
1153e41f4b71Sopenharmony_ci    console.log('Callee onCreate is called');
1154e41f4b71Sopenharmony_ci    try {
1155e41f4b71Sopenharmony_ci      this.callee.off(method);
1156e41f4b71Sopenharmony_ci    } catch (error) {
1157e41f4b71Sopenharmony_ci      console.error(`Callee.off catch error, error.code: ${error.code}, error.message: ${error.message}`);
1158e41f4b71Sopenharmony_ci    }
1159e41f4b71Sopenharmony_ci  }
1160e41f4b71Sopenharmony_ci}
1161e41f4b71Sopenharmony_ci```
1162e41f4b71Sopenharmony_ci
1163e41f4b71Sopenharmony_ci## OnReleaseCallback
1164e41f4b71Sopenharmony_ci
1165e41f4b71Sopenharmony_ci### (msg: string)
1166e41f4b71Sopenharmony_ci
1167e41f4b71Sopenharmony_ci(msg: string): void
1168e41f4b71Sopenharmony_ci
1169e41f4b71Sopenharmony_ci注册通用组件服务端Stub(桩)断开监听通知的回调函数类型。
1170e41f4b71Sopenharmony_ci
1171e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
1172e41f4b71Sopenharmony_ci
1173e41f4b71Sopenharmony_ci**参数:**
1174e41f4b71Sopenharmony_ci
1175e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
1176e41f4b71Sopenharmony_ci| --- | ----- | --- | -------- |
1177e41f4b71Sopenharmony_ci| msg | string | 是 | 用于传递释放消息。 | 
1178e41f4b71Sopenharmony_ci 
1179e41f4b71Sopenharmony_ci## OnRemoteStateChangeCallback<sup>10+</sup>
1180e41f4b71Sopenharmony_ci
1181e41f4b71Sopenharmony_ci### (msg: string)
1182e41f4b71Sopenharmony_ci
1183e41f4b71Sopenharmony_ci(msg: string): void
1184e41f4b71Sopenharmony_ci
1185e41f4b71Sopenharmony_ci注册协同场景下跨设备组件状态变化监听通知的回调函数类型。
1186e41f4b71Sopenharmony_ci
1187e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
1188e41f4b71Sopenharmony_ci
1189e41f4b71Sopenharmony_ci**参数:**
1190e41f4b71Sopenharmony_ci
1191e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
1192e41f4b71Sopenharmony_ci| --- | ----- | --- | -------- |
1193e41f4b71Sopenharmony_ci| msg | string | 是 | 用于传递释放消息。 | 
1194e41f4b71Sopenharmony_ci 
1195e41f4b71Sopenharmony_ci## CalleeCallback
1196e41f4b71Sopenharmony_ci
1197e41f4b71Sopenharmony_ci### (indata: rpc.MessageSequence)
1198e41f4b71Sopenharmony_ci
1199e41f4b71Sopenharmony_ci(indata: rpc.MessageSequence): rpc.Parcelable
1200e41f4b71Sopenharmony_ci
1201e41f4b71Sopenharmony_ci通用组件服务端注册消息通知的回调函数类型。
1202e41f4b71Sopenharmony_ci
1203e41f4b71Sopenharmony_ci**系统能力**:SystemCapability.Ability.AbilityRuntime.AbilityCore
1204e41f4b71Sopenharmony_ci
1205e41f4b71Sopenharmony_ci**参数:**
1206e41f4b71Sopenharmony_ci
1207e41f4b71Sopenharmony_ci| 参数名 | 类型 | 必填 | 说明 |
1208e41f4b71Sopenharmony_ci| --- | ----- | --- | -------- |
1209e41f4b71Sopenharmony_ci| indata | [rpc.MessageSequence](../apis-ipc-kit/js-apis-rpc.md#messagesequence9) | 是 | 发送需传递的数据。 |
1210e41f4b71Sopenharmony_ci
1211e41f4b71Sopenharmony_ci**返回值:**
1212e41f4b71Sopenharmony_ci
1213e41f4b71Sopenharmony_ci| 类型   | 说明                                  |
1214e41f4b71Sopenharmony_ci| ------------ | ------------------------------------- |
1215e41f4b71Sopenharmony_ci| [rpc.Parcelable](../apis-ipc-kit/js-apis-rpc.md#parcelable9) | 返回的数据对象。 |
1216