管理麥克風

開發(fā)步驟及注意事項

在AudioVolumeGroupManager中提供了管理麥克風狀態(tài)的方法，接口的詳細說明請參考API文檔。

1. 創(chuàng)建audioVolumeGroupManager對象。

   import audio from '@ohos.multimedia.audio';
   
   let audioVolumeGroupManager;
   async function loadVolumeGroupManager() { //創(chuàng)建audioVolumeGroupManager對象
     const groupid = audio.DEFAULT_VOLUME_GROUP_ID;
     audioVolumeGroupManager = await audio.getAudioManager().getVolumeManager().getVolumeGroupManager(groupid);
     console.info('audioVolumeGroupManager create success.');
   }

2. 調(diào)用on('micStateChange')監(jiān)聽麥克風狀態(tài)變化，當麥克風靜音狀態(tài)發(fā)生變化時將通知應用。

   目前此訂閱接口在單進程多AudioManager實例的使用場景下，僅最后一個實例的訂閱生效，其他實例的訂閱會被覆蓋（即使最后一個實例沒有進行訂閱），因此推薦使用單一AudioManager實例進行開發(fā)。

   async function on() {   //監(jiān)聽麥克風狀態(tài)變化
     audioVolumeGroupManager.on('micStateChange', (micStateChange) => {
       console.info(`Current microphone status is: ${micStateChange.mute} `);
     });
   }

3. 調(diào)用isMicrophoneMute查詢麥克風當前靜音狀態(tài)，返回true為靜音，false為非靜音。

   async function isMicrophoneMute() { //查詢麥克風是否靜音
     await audioVolumeGroupManager.isMicrophoneMute().then((value) => {
       console.info(`isMicrophoneMute is: ${value}.`);
     });
   }

4. 根據(jù)查詢結(jié)果的實際情況，調(diào)用setMicrophoneMute設置麥克風靜音狀態(tài)，入?yún)⑤斎雝rue為靜音，false為非靜音。

   async function setMicrophoneMuteTrue() { //設置麥克風靜音，入?yún)閠rue
     await audioVolumeGroupManager.setMicrophoneMute(true).then(() => {
       console.info('setMicrophoneMute to mute.');
     });
   }
   async function setMicrophoneMuteFalse() { //取消麥克風靜音，入?yún)閒alse
     await audioVolumeGroupManager.setMicrophoneMute(false).then(() => {
       console.info('setMicrophoneMute to not mute.');
     });
   }

完整示例

參考以下示例，完成從設置麥克風靜音到取消麥克風靜音的過程。

import audio from '@ohos.multimedia.audio';

@Entry
@Component
struct AudioVolumeGroup {
 private audioVolumeGroupManager: audio.AudioVolumeGroupManager;

  async loadVolumeGroupManager() {
    const groupid = audio.DEFAULT_VOLUME_GROUP_ID;
    this.audioVolumeGroupManager = await audio.getAudioManager().getVolumeManager().getVolumeGroupManager(groupid);
    console.info('audioVolumeGroupManager------create-------success.');
  }

  async on() {   //監(jiān)聽麥克風狀態(tài)變化
    await this.loadVolumeGroupManager();
    this.audioVolumeGroupManager.on('micStateChange', (micStateChange) => {
      console.info(`Current microphone status is: ${micStateChange.mute} `);
    });
  }
  async isMicrophoneMute() { //查詢麥克風是否靜音
    await this.audioVolumeGroupManager.isMicrophoneMute().then((value) => {
      console.info(`isMicrophoneMute is: ${value}.`);
    });
  }
  async setMicrophoneMuteTrue() { //設置麥克風靜音
    await this.loadVolumeGroupManager();
    await this.audioVolumeGroupManager.setMicrophoneMute(true).then(() => {
      console.info('setMicrophoneMute to mute.');
    });
  }
  async setMicrophoneMuteFalse() { //取消麥克風靜音
    await this.loadVolumeGroupManager();
    await this.audioVolumeGroupManager.setMicrophoneMute(false).then(() => {
      console.info('setMicrophoneMute to not mute.');
    });
  }
  async test(){
    await this.on();
    await this.isMicrophoneMute();
    await this.setMicrophoneMuteTrue();
    await this.isMicrophoneMute();
    await this.setMicrophoneMuteFalse();
    await this.isMicrophoneMute();
    await this.setMicrophoneMuteTrue();
    await this.isMicrophoneMute();
  }
}