Android 打開/關閉揚聲器的代碼

    private static int currVolume = 0;


 //打開揚聲器
 public void OpenSpeaker() {
     try{     


//判斷揚聲器是否在打開
         AudioManager audioManager =(AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);

     audioManager.setMode(AudioManager.ROUTE_SPEAKER);


//獲取當前通話音量
         currVolume =audioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL);

    if(!audioManager.isSpeakerphoneOn()) {
      audioManager.setSpeakerphoneOn(true);

       audioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL,
             audioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL ),
             AudioManager.STREAM_VOICE_CALL);
     }
    } catch (Exception e) {
        e.printStackTrace();
    }
 }

//關閉揚聲器
public void CloseSpeaker() {

    try {
        AudioManageraudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
       if(audioManager != null) {
           if(audioManager.isSpeakerphoneOn()) {
             audioManager.setSpeakerphoneOn(false);
             audioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL,currVolume,
                        AudioManager.STREAM_VOICE_CALL);
           }
        }
    } catch (Exception e) {
       e.printStackTrace();
    }
     //Toast.makeText(context,揚聲器已經關閉",Toast.LENGTH_SHORT).show();
} </pre><br />