原文链接
版本号：openharmony 3.2R

实现功能

在OpenHarmony stage模型中实现在entry module里面启动其他module的ability

在device module中有个DeviceVariableAbility

import ServiceExtensionAbility from '@ohos.app.ability.ServiceExtensionAbility';


const TAG: string = "[ServiceExtAbility]";

export default class DeviceVariableAbility extends ServiceExtensionAbility {
  onCreate(want) {
    console.info(TAG, `onCreate12345, want: ${want.abilityName}`);
  }

  onRequest(want, startId) {
    console.info(TAG, `onRequest, want: ${want.abilityName}`);
  }

  onConnect(want) {
    console.info(TAG, `onConnect, want: ${want.abilityName}`);
    // 返回ServiceExtImpl对象，客户端获取后便可以与ServiceExtensionAbility进行通信
    return null;
  }

  onDisconnect(want) {
    console.info(TAG, `onDisconnect, want: ${want.abilityName}`);
  }

  onDestroy() {
    console.info(TAG, `onDestroy`);
  }
}

在entry模块中的启动Ability EntryAbility 通过 startServiceExtensionAbility接口拉起上面那个DeviceVariableAbility

import UIAbility from '@ohos.app.ability.UIAbility';
import hilog from '@ohos.hilog';
import window from '@ohos.window';
import DeviceInfo from './DeviceInfo';

export default class EntryAbility extends UIAbility {
  onCreate(want, launchParam) {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
    let context = this.context;
    new DeviceInfo(this.context);

    let deviceVariableAbility = {
      "bundleName": "com.hmwl.hmhmi",
      "abilityName": "DeviceVariableAbility"
    };


    context.startServiceExtensionAbility(deviceVariableAbility).then(() => {
      console.info('Succeeded in starting ServiceExtensionAbility.');
    }).catch((err) => {
      console.error(`Failed to start ServiceExtensionAbility. Code is ${err.code}, message is ${err.message}`);
    })

  }

  onDestroy() {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onDestroy');
  }

  onWindowStageCreate(windowStage: window.WindowStage) {
    // Main window is created, set main page for this ability
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');

    windowStage.loadContent('pages/Index', (err, data) => {
      if (err.code) {
        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? '');
    });
  }

  onWindowStageDestroy() {
    // Main window is destroyed, release UI related resources
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');
  }

  onForeground() {
    // Ability has brought to foreground
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');
  }

  onBackground() {
    // Ability has back to background
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onBackground');
  }
}