[AndroidTips]打开/关闭免提（SpeakerPhone）

//打开扬声器
     public void OpenSpeaker() {

         try{
         AudioManager audioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
         audioManager.setMode(AudioManager.ROUTE_SPEAKER);
         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 {
            AudioManager audioManager = (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();
    }

 

 

setSpeakerphoneOn() only work when audio mode set to MODE_IN_CALL. Try this:

AudioManager audioManager = (AudioManager)mActivity.getSystemService(Context.AUDIO_SERVICE); audioManager.setMode(AudioManager.MODE_IN_CALL); audioManager.setSpeakerphoneOn(true);

Please remember set back to normal mode before you quit.

 

Your code needs to have android.permission.MODIFY_AUDIO_SETTINGS permission set in your manifest file because setSpeakerPhoneOn() requires that permission.