Android 音频录制和播放环回问题

我正在尝试在我的android应用程序中同时进行音频录制和播放，代码第一次运行良好，然后就崩溃了。给出以下错误。请任何人解决这个问题，或者给我建议解决这个问题的方法

Error :
DALVIK THREADS:
    (mutexes: tll=0 tsl=0 tscl=0 ghl=0 hwl=0 hwll=0)
    "main" prio=5 tid=1 NATIVE
      | group="main" sCount=1 dsCount=0 obj=0x40022178 self=0xce48
      | sysTid=3508 nice=-19 sched=0/0 cgrp=[fopen-error:2] handle=-1345006496
      | schedstat=( 94146739 97717292 625 )
          at android.media.AudioTrack.native_write_byte(Native Method)
      at android.media.AudioTrack.write(AudioTrack.java:912)
      at com.brcm.factorymode.audioloop.speaker.RecordNPlay.loopback(RecordNPlay.java:102)
      at com.brcm.factorymode.audioloop.speaker.RecordNPlay$1.run(RecordNPlay.java:131)
      at com.brcm.factorymode.audioloop.speaker.RecordNPlay.do_loopback(RecordNPlay.java:136)
      at com.brcm.factorymode.audioloop.speaker.RecordNPlay.onCreate(RecordNPlay.java:53)
      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
      at android.app.ActivityThread.access$1500(ActivityThread.java:117)
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
      at android.os.Handler.dispatchMessage(Handler.java:99)
      at android.os.Looper.loop(Looper.java:130)
      at android.app.ActivityThread.main(ActivityThread.java:3683)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:507)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
      at dalvik.system.NativeStart.main(Native Method)

请检查下面使用的代码

        public void loopback() {
            buffer = new byte[BUF_SIZE];
            // Prepare the AudioRecord & AudioTrack
            Log.e("LOG", "Entered into loopback function....");

            try {

                buffersize = AudioRecord.getMinBufferSize(SAMPLE_RATE,AudioFormat.CHANNEL_IN_MONO,
                                AudioFormat.ENCODING_PCM_16BIT);

            } catch (Throwable t) {
                Log.e("Audio", "Buffer size failed");
            }

            if (buffersize <= BUF_SIZE) {
                buffersize = BUF_SIZE;
            }
            try {
                //findAudioRecord(); 
                m_record = new AudioRecord(MediaRecorder.AudioSource.MIC,
                        SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO,
                        AudioFormat.ENCODING_PCM_16BIT, buffersize * 1);

                m_track = new AudioTrack(AudioManager.STREAM_VOICE_CALL,
                        SAMPLE_RATE, AudioFormat.CHANNEL_OUT_MONO,
                        AudioFormat.ENCODING_PCM_16BIT, buffersize * 1,
                        AudioTrack.MODE_STREAM);

                m_track.setPlaybackRate(SAMPLE_RATE);
                Log.e("LOG", "INITIALIZATIONS DONE....");

            } catch (Throwable t) {
                Log.e("Audio", "Audio Failed");
            }
            if(m_record!=null)
            if (m_record.getState() == AudioRecord.STATE_INITIALIZED)
                m_record.startRecording();
            if(m_track!=null)
            if (m_track.getState() == AudioTrack.STATE_INITIALIZED)
                m_track.play();
            try {
                int i = 0;
                while (i<=10) {
                //  buffer=new byte[buffersize];
                    m_record.read(buffer, 0, buffersize);
                    m_track.write(buffer, 0, buffersize);
                    //m_track.flush();

    /*              try{
                    Thread.sleep(200);
                    }catch(Exception e){}
    */              
                    i++;
                }
                if (i>10) {
                    buffer = null;
                        m_record.stop();
                    m_track.stop();
                    i=0;
                }
            } catch (Exception e) {
                Log.e("Em_recordRROR", "exception: " + e.getLocalizedMessage());
            }

            Log.i("D2Record", "loopback exit");
        }

        private void do_loopback() {

            m_thread = new Runnable() {
                public void run() {
                    android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
                    m_isRun = true;

                    loopback();

                }
            };

            m_thread.run();
        }

---

这个问题已经解决，问题在设备源代码中，我在许多其他设备上测试了它。它工作正常。

请看一下我的问题，并帮助我解决类似的问题