android AudioTrack不能播放awr(3)

            this.isRecording = false; 

            System.out.println(isRecording); 

            break; 

        case R.id.btn_play: 

            player = new PlayTask(); 

            player.execute(); 

            break; 

        case R.id.btn_finish: 

            this.isPlaying = false; 

            break; 

        } 

    } 

    class RecordTask extends AsyncTask<Void, Integer, Void>{ 

        @Override 

        protected Void doInBackground(Void... arg0) { 

            //isRecording = true; 

            try { 

                //开通输出流到指定的文件

                DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(audioFile))); 

                //FileOutputStream fos = new FileOutputStream(audioFile); 

                //根据定义好的几个配置，来获取合适的缓冲大小

                int bufferSize = AudioRecord.getMinBufferSize(frequence, channelConfig, audioEncoding); 

                //实例化AudioRecord 

                AudioRecord record = new AudioRecord(MediaRecorder.AudioSource.MIC, frequence, channelConfig, audioEncoding, bufferSize); 

                //定义缓冲

                short[] buffer = new short[bufferSize];