mediaRecoder开始录制和停止录制的时候

使用mediaRecoder开始录制和停止录制的时候会发出“嘀”声音，怎么关闭这个声音,
方法1
/* ((AudioManager)context.getSystemService(Context.AUDIO_SERVICE)).setStreamMute(AudioManager.STREAM_SYSTEM,true);//关闭录制状态发生改变时的声音

方法2
AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

    audioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
    audioManager.setStreamMute(AudioManager.STREAM_MUSIC,true);
    audioManager.setStreamVolume(AudioManager.STREAM_ALARM, 0, 0);
    audioManager.setStreamVolume(AudioManager.STREAM_DTMF, 0, 0);
    audioManager.setStreamVolume(AudioManager.STREAM_NOTIFICATION, 0, 0);
    audioManager.setStreamVolume(AudioManager.STREAM_RING, 0, 0);*/

两种我都试了解决不了,求大神