harmony 鸿蒙WindowExtensionContext

2023-02-17
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WindowExtensionContext

WindowExtensionContext模块是WindowExtensionAbility的上下文环境，继承自ExtensionContext。

WindowExtensionContext模块提供WindowExtensionAbility具有的能力，包括启动Ability。

说明：

本模块首批接口从API version 9开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。

本模块接口为系统接口。

本模块接口仅可在Stage模型下使用。

使用说明

在使用WindowExtensionContext的功能前，需要通过WindowExtensionAbility子类实例获取。

import WindowExtensionAbility from '@ohos.application.WindowExtensionAbility';
import WindowExtensionContext from 'application/WindowExtensionContext';

let context: WindowExtensionContext|null = null;

class WindowExtAbility extends WindowExtensionAbility {
  onConnect() {
    context = this.context; // 获取WindowExtensionContext
  }
}

WindowExtensionContext.startAbility

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

启动Ability，使用callback异步回调。

系统能力：SystemCapability.WindowManager.WindowManager.Core

参数：

参数名	类型	必填	说明
want	Want	是	启动Ability的want信息。
options	StartOptions	是	启动Ability所携带的参数。
callback	AsyncCallback<void>	是	callback形式返回启动结果。

示例：

import WindowExtensionAbility from '@ohos.application.WindowExtensionAbility';
import { BusinessError } from '@ohos.base';
import Want from '@ohos.app.ability.Want';
import StartOptions from '@ohos.app.ability.StartOptions';

class WindowExtAbility extends WindowExtensionAbility {
  
  onConnect() {
    let want: Want = {
      bundleName: 'com.example.myapplication',
      abilityName: 'MainAbility'
    };
    let options: StartOptions = {
      windowMode: 102
    };

    try {
      this.context.startAbility(want, options, (error: BusinessError) => {
        let message = (error as BusinessError).message;
        let errCode = (error as BusinessError).code;
        if (errCode) {
          // 处理业务逻辑错误
          console.error(`startAbility failed, error.code: ${errCode}, error.message: ${message}`);
          return;
        }
        // 执行正常业务
        console.log('startAbility succeed');
      });
    } catch (paramError) {
      // 处理入参错误异常
      let message = (paramError as BusinessError).message;
      let errCode = (paramError as BusinessError).code;
      console.error(`error.code: ${errCode}, error.message: ${message}`);
    }
  }
}

WindowExtensionContext.startAbility

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

启动Ability，使用Promise异步回调。

系统能力：SystemCapability.WindowManager.WindowManager.Core

参数：

参数名	类型	必填	说明
want	Want	是	Want类型参数，传入需要启动的ability的信息，如Ability名称，Bundle名称等。
options	StartOptions	否	启动Ability所携带的参数。

返回值：

类型	说明
Promise<void>	无返回结果的Promise对象。

示例：

import WindowExtensionAbility from '@ohos.application.WindowExtensionAbility';
import { BusinessError } from '@ohos.base';
import Want from '@ohos.app.ability.Want';
import StartOptions from '@ohos.app.ability.StartOptions';

class WindowExtAbility extends WindowExtensionAbility {

  onConnect() {
    let want: Want = {
      bundleName: 'com.example.myapp',
      abilityName: 'MainAbility'
    };
    let options: StartOptions = {
      windowMode: 102,
    };

    try {
      this.context.startAbility(want, options)
        .then(() => {
          // 执行正常业务
          console.log('startAbility succeed');
        })
        .catch((error: BusinessError) => {
          // 处理业务逻辑错误
          let message = (error as BusinessError).message;
          let errCode = (error as BusinessError).code;
          console.error(`startAbility failed, error.code: ${errCode}, error.message: ${message}`);
        });
    } catch (paramError) {
      // 处理入参错误异常
      let message = (paramError as BusinessError).message;
      let errCode = (paramError as BusinessError).code;
      console.error(`error.code: ${errCode}, error.message: ${message}`);
    }
  }
}