harmony OS NEXT-音频录制与播放模块

async checkPermission() {

  const manager = abilityAccessCtrl.createAtManager();

  

  // 首次权限申请

  const result = await manager.requestPermissionsFromUser(

    getContext(), ["ohos.permission.MICROPHONE"]

  );



  // 检查所有权限是否通过

  const isPass = result.authResults.every(

    res => res === abilityAccessCtrl.GrantStatus.PERMISSION\_GRANTED

  );



  if (!isPass) {

    // 二次弹窗引导设置

    const confirm = await promptAction.showDialog({...});

    

    if (confirm.index === 1) {

      // 跳转系统设置

      const finalResult = await manager.requestPermissionOnSetting(

        getContext(), ["ohos.permission.MICROPHONE"]

      );

    }

  }

}

// 创建文件描述符

const file = fileIo.openSync(filePath, 

  fileIo.OpenMode.CREATE | fileIo.OpenMode.READ\_WRITE);



// AVRecorder 参数配置

const config = {

  audioSourceType: media.AudioSourceType.AUDIO\_SOURCE\_TYPE\_MIC,

  url: `fd://${file.fd}`,

  profile: {

    audioBitrate: 100000,

    audioChannels: 2,

    audioSampleRate: 48000,

    audioCodec: media.CodecMimeType.AUDIO\_AAC,

    fileFormat: media.ContainerFormatType.CFT\_MPEG\_4A

  }

};

async playRecord() {

  const avPlayer = await media.createAVPlayer();

  avPlayer.url = `fd://${file.fd}`;

  

  avPlayer.on('stateChange', (state) => {

    if (state === 'initialized') {

      avPlayer.prepare();

    } else if (state === 'prepared') {

      avPlayer.play(); // 自动播放

    }

  });

}