Android 打开/关闭扬声器的代码

    private static int currVolume = 0;         //打开扬声器       public void OpenSpeaker() {           try{         //判断扬声器是否在打开           AudioManager audioManager =(AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);              audioManager.setMode(AudioManager.ROUTE_SPEAKER);    //获取当前通话音量           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();          }       }        //关闭扬声器      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,扬声器已经关闭",Toast.LENGTH_SHORT).show();      }