Android EMChatOptions 设置扬声器与听筒发声转换失败

环信demo里只有第一次设置有效，然后就再也没有用了。

这个设置Demo你度啊雅：AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE); private void setSpeakerphoneOn(boolean on) {                 if(on) {                         audioManager.setSpeakerphoneOn(true);                 } else {                         audioManager.setSpeakerphoneOn(false);//关闭扬声器                         audioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_EARPIECE, AudioManager.ROUTE_ALL);                         setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);                         //把声音设定成Earpiece（听筒）出来，设定为正在通话中                         audioManager.setMode(AudioManager.MODE_IN_CALL);                 } }