HarmonyOS 鸿蒙Next 语音录制audio.AudioCapturer对象不能正常被创建

import { audio } from '@kit.AudioKit';
import { abilityAccessCtrl, common, Permissions } from '@kit.AbilityKit';
import { BusinessError } from '@kit.BasicServicesKit';

const permissions: Array<Permissions> = ['ohos.permission.MICROPHONE'];

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';

  // 使用UIExtensionAbility：将common.UIAbilityContext 替换为common.UIExtensionContext
  reqPermissionsFromUser(permissions: Array<Permissions>, context: common.UIAbilityContext): void {
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    // requestPermissionsFromUser会判断权限的授权状态来决定是否唤起弹窗
    atManager.requestPermissionsFromUser(context, permissions).then(async (data) => {
      let grantStatus: Array<number> = data.authResults;
      let length: number = grantStatus.length;
      for (let i = 0; i < length; i++) {
        if (grantStatus[i] === 0) {
          // 用户授权，可以继续访问目标操作
          await this.init() //打开采集器
        } else {
          // 用户拒绝授权，提示用户必须授权才能访问当前页面的功能，并引导用户到系统设置中打开相应的权限
          return;
        }
      }
      // 授权成功
    }).catch((err: BusinessError) => {
      console.error(`Failed to request permissions from user. Code is ${err.code}, message is ${err.message}`);
    })
  }

  //配置音频采集参数并创建AudioCapturer实例
   async init(): Promise<void> {

    let audioStreamInfo: audio.AudioStreamInfo = {
      samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_48000, // 采样率
      channels: audio.AudioChannel.CHANNEL_2, // 通道
      sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE, // 采样格式
      encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW // 编码格式
    };

    let audioCapturerInfo: audio.AudioCapturerInfo = {
      source: audio.SourceType.SOURCE_TYPE_MIC,
      capturerFlags: 0
    };

    let audioCapturerOptions: audio.AudioCapturerOptions = {
      streamInfo: audioStreamInfo,
      capturerInfo: audioCapturerInfo
    };

    audio.createAudioCapturer(audioCapturerOptions, (err, data) => {
      if (err) {
        console.error(`Invoke createAudioCapturer failed, code is ${err.code}, message is ${err.message}`);
      } else {
        console.info('Invoke createAudioCapturer succeeded.');
        let audioCapturer = data;
      }
    });
  }

  async aboutToAppear(): Promise<void>{
    const context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext;
    this.reqPermissionsFromUser(permissions, context);
  }
  build() {
    RelativeContainer() {
      Text(this.message)
        .id('HelloWorld')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
        .alignRules({
          center: { anchor: '__container__', align: VerticalAlign.Center },
          middle: { anchor: '__container__', align: HorizontalAlign.Center }
        })
        .onClick(async ()=>{
          await this.init() //打开采集器
        })
    }
    .height('100%')
    .width('100%')
  }
}