使用MediaRecorder录制声音的时候,环信的语音通话无声音

我查看录音文件成功生成,播放的时候也是有声音的,但是只要是一录制声音,环信这边语音通话无声音
File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),"ivr_record"); if(!dir.exists()){ dir.mkdirs(); } mFileName = new File(dir,"ivr_"+System.currentTimeMillis()+".3gp").getAbsolutePath(); mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); mRecorder.setOutputFile(mFileName); mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); try { mRecorder.prepare(); } catch (IOException e) { }