音频的录制方式-AudioRecord,MediaRecorder的使用及播放

Posted 2022-12-05 xiaohuanqi

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AudioRecord和MediaRecorder两种都可以录制音频，MediaRecorder已实现大量的封装，操作起来更加简单，而AudioRecord使用起来更加灵活，能实现更多的功能。

1.AudioRecord(基于字节流录音)

优点：可以实现语音的实时处理，进行边录边播，对音频的实时处理。 
缺点：输出的是PCM的语音数据，如果保存成音频文件是不能被播放器播放的。要用到AudioTrack这个去进行处理。

2.MediaRecorder(基于文件录音)

已集成了录音，编码，压缩等，支持少量的音频格式文件。 
优点：封装度很高，操作简单 
缺点：无法实现实时处理音频，输出的音频格式少。

功能实现：MediaRecorder（这里需要注意，无论录制还是播放都是一个耗时操作，需要在非主线程中去操作）

//实现触摸录音，松开录音结束
tv_press_send.setOnTouchListener(new View.OnTouchListener() 
            @Override
            public boolean onTouch(View v, MotionEvent event) 
                switch (event.getAction()) 
                    case MotionEvent.ACTION_DOWN:
                        startRecorder();
                        break;
                    case MotionEvent.ACTION_UP:
                        stopRecorder();
                        break;
                    case MotionEvent.ACTION_CANCEL:
                        break;
                    default:
                        break;
                
                return true;
            
        );


开启一个单线程去实现录音功能，及失败操作：

/**
     * 开启录音
     */
    private void startRecorder() 
        tv_press_send.setText("正在说话...");
        //提交后台任务，开始录音
        mExecutorService.submit(new Runnable() 
            @Override
            public void run() 
                //释放上一次的录音
                releaseRecorder();
                //开始录音
                if (!doStart()) 
                    recorderFial();
                
            
        );
    

启动录音，及MediaRecorder的配置：

/**
     * 启动录音
     *
     * @return
     */
    private boolean doStart() 
        try 
            //创建MediaRecorder
            mMediaRecorder = new MediaRecorder();
            //创建录音文件
            mRecorderFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
                    + "/recorderdemo/" + System.currentTimeMillis() + ".m4a");
            if (!mRecorderFile.getParentFile().exists()) mRecorderFile.getParentFile().mkdirs();
            mRecorderFile.createNewFile();
            //配置MediaRecorder
            //从麦克风采集
            mMediaRecorder.setAudiosource(MediaRecorder.AudioSource.MIC);
            //保存文件为MP4格式
         mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            //所有android系统都支持的适中采样的频率
            mMediaRecorder.setAudioSamplingRate(44100);
            //通用的AAC编码格式
           mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
            //设置音质频率
            mMediaRecorder.setAudioEncodingBitRate(96000);
            //设置文件录音的位置
            mMediaRecorder.setOutputFile(mRecorderFile.getAbsolutePath());
            //开始录音
            mMediaRecorder.prepare();
            mMediaRecorder.start();
            startRecorderTime = System.currentTimeMillis();
         catch (Exception e) 
            Toast.makeText(FileActivity.this, "录音失败，请重试", Toast.LENGTH_SHORT).show();
            return false;
        
        //记录开始录音时间，用于统计时长，小于3秒中，录音不发送
        return true;
    

停止录音操作：

/**
     * 关闭录音
     *
     * @return
     */
    private boolean doStop() 
        try 
            mMediaRecorder.stop();
            stopRecorderTime = System.currentTimeMillis();
            final int second = (int) (stopRecorderTime - startRecorderTime) / 1000;
            //按住时间小于3秒钟，算作录取失败，不进行发送
            if (second < 3) return false;
            mHander.post(new Runnable() 
                @Override
                public void run() 
                    tv_sendmsg.setText("录制成功：" + second + "秒");
                
            );
         catch (Exception e) 
            e.printStackTrace();
        
        return true;
    

释放MediaRecorder：

 /**
     * 释放上一次的录音
     */
    private void releaseRecorder() 
        if (mMediaRecorder != null) 
            mMediaRecorder.release();
            mMediaRecorder = null;
        
    


录音的播放：使用MediaPlayer

开启一个单线程，去播放：

/**
     * 播放录音
     *
     * @param view
     */
    public void playrecorder(View view) 
        if (!mIsPlaying) 
            mExecutorService.submit(new Runnable() 
                @Override
                public void run() 
                    doPlay(mRecorderFile);
                
            );
         else 
            Toast.makeText(FileActivity.this, "正在播放", Toast.LENGTH_SHORT).show();
        
    

具体播放代码：

private void doPlay(File audioFile) 
        try 
            //配置播放器 MediaPlayer
            mediaPlayer = new MediaPlayer();
            //设置声音文件
            mediaPlayer.setDataSource(audioFile.getAbsolutePath());
            //配置音量,中等音量
            mediaPlayer.setVolume(1,1);
            //播放是否循环
            mediaPlayer.setLooping(false);
            //设置监听回调 播放完毕
            mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() 
                @Override
                public void onCompletion(MediaPlayer mp) 
                    stopPlayer();
                
            );
            mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() 
                @Override
                public boolean onError(MediaPlayer mp, int what, int extra) 
                    stopPlayer();
                    Toast.makeText(FileActivity.this,"播放失败",Toast.LENGTH_SHORT).show();
                    return true;
                
            );
            //设置播放
            mediaPlayer.prepare();
            mediaPlayer.start();
            //异常处理，防止闪退
         catch (Exception e) 
            e.printStackTrace();
            stopPlayer();
        
    

activity销毁后的onDestory的处理：

 @Override
    protected void onDestroy() 
        super.onDestroy();
        //当activity关闭时，停止这个线程，防止内存泄漏
        mExecutorService.shutdownNow();
        releaseRecorder();
    

MediaRecord完整功能实现代码：

public class FileActivity extends AppCompatActivity
private TextView tv_sendmsg, tv_press_send;
private ExecutorService mExecutorService;
private MediaRecorder mMediaRecorder;
private MediaPlayer mediaPlayer;
private File mRecorderFile;
private long startRecorderTime, stopRecorderTime;
private Handler mHander = new Handler(Looper.getMainLooper());
private boolean mIsPlaying = false;

@Override
protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_first);
    setTitle("文件录音");
    initView();
    //录音JNI函数不具有线程安全性，因此用单线程
    mExecutorService = Executors.newSingleThreadExecutor();


private void initView() 
    tv_sendmsg = (TextView) findViewById(R.id.tv_sendmsg);
    tv_press_send = (TextView) findViewById(R.id.tv_press_send);
    tv_press_send.setOnTouchListener(new View.OnTouchListener() 
        @Override
        public boolean onTouch(View v, MotionEvent event) 
            switch (event.getAction()) 
                case MotionEvent.ACTION_DOWN:
                    startRecorder();
                    break;

                case MotionEvent.ACTION_UP:
                    stopRecorder();
                    break;

                case MotionEvent.ACTION_CANCEL:

                    break;

                default:
                    break;
            
            return true;
        
    );


/**
 * 开启录音
 */
private void startRecorder() 
    tv_press_send.setText("正在说话...");
    //提交后台任务，开始录音
    mExecutorService.submit(new Runnable() 
        @Override
        public void run() 
            //释放上一次的录音
            releaseRecorder();

            //开始录音

            if (!doStart()) 
                recorderFial();
            
        
    );



/**
 * 释放上一次的录音
 */
private void releaseRecorder() 
    if (mMediaRecorder != null) 
        mMediaRecorder.release();
        mMediaRecorder = null;
    


/**
 * 启动录音
 *
 * @return
 */

private boolean doStart() 

    try 
        //创建MediaRecorder
        mMediaRecorder = new MediaRecorder();
        //创建录音文件
        mRecorderFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
                + "/recorderdemo/" + System.currentTimeMillis() + ".m4a");
        if (!mRecorderFile.getParentFile().exists()) mRecorderFile.getParentFile().mkdirs();
        mRecorderFile.createNewFile();


        //配置MediaRecorder

        //从麦克风采集
        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

        //保存文件为MP4格式
        mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

        //所有android系统都支持的适中采样的频率
        mMediaRecorder.setAudioSamplingRate(44100);

        //通用的AAC编码格式
        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

        //设置音质频率
        mMediaRecorder.setAudioEncodingBitRate(96000);

        //设置文件录音的位置
        mMediaRecorder.setOutputFile(mRecorderFile.getAbsolutePath());


        //开始录音
        mMediaRecorder.prepare();
        mMediaRecorder.start();
        startRecorderTime = System.currentTimeMillis();

     catch (Exception e) 
        Toast.makeText(FileActivity.this, "录音失败，请重试", Toast.LENGTH_SHORT).show();
        return false;
    


    //记录开始录音时间，用于统计时长，小于3秒中，录音不发送

    return true;


/**
 * 关闭录音
 *
 * @return
 */
private boolean doStop() 
    try 
        mMediaRecorder.stop();
        stopRecorderTime = System.currentTimeMillis();
        final int second = (int) (stopRecorderTime - startRecorderTime) / 1000;
        //按住时间小于3秒钟，算作录取失败，不进行发送
        if (second < 3) return false;
        mHander.post(new Runnable() 
            @Override
            public void run() 
                tv_sendmsg.setText("录制成功：" + second + "秒");
            
        );

     catch (Exception e) 
        e.printStackTrace();
    
    return true;



/**
 * 录音失败逻辑
 */

private void recorderFial() 
    mRecorderFile = null;
    mHander.post(new Runnable() 
        @Override
        public void run() 
            tv_press_send.setText("录音失败请重新录音");
        
    );



/**
 * 停止录音
 */
private void stopRecorder() 
    tv_press_send.setText("开始录音");
    //提交后台任务，停止录音
    mExecutorService.submit(new Runnable() 
        @Override
        public void run() 
            if (!doStop()) 
                recorderFial();
            
            releaseRecorder();

        
    );



/**
 * 播放录音
 *
 * @param view
 */
public void playrecorder(View view) 
    if (!mIsPlaying) 
        mExecutorService.submit(new Runnable() 
            @Override
            public void run() 
                doPlay(mRecorderFile);
            
        );

     else 
        Toast.makeText(FileActivity.this, "正在播放", Toast.LENGTH_SHORT).show();
    



private void doPlay(File audioFile) 
    try 
        //配置播放器 MediaPlayer
        mediaPlayer = new MediaPlayer();
        //设置声音文件
        mediaPlayer.setDataSource(audioFile.getAbsolutePath());
        //配置音量,中等音量
        mediaPlayer.setVolume(1,1);
        //播放是否循环
        mediaPlayer.setLooping(false);

        //设置监听回调 播放完毕
        mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() 
            @Override
            public void onCompletion(MediaPlayer mp) 
                stopPlayer();
            
        );

        mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() 
            @Override
            public boolean onError(MediaPlayer mp, int what, int extra) 
                stopPlayer();
                Toast.makeText(FileActivity.this,"播放失败",Toast.LENGTH_SHORT).show();
                return true;
            
        );

        //设置播放
        mediaPlayer.prepare();
        mediaPlayer.start();

        //异常处理，防止闪退

     catch (Exception e) 
        e.printStackTrace();
        stopPlayer();
    




private void stopPlayer()
    mIsPlaying=false;
    mediaPlayer.release();
    mediaPlayer=null;



@Override
protected void onDestroy() 
    super.onDestroy();
    //当activity关闭时，停止这个线程，防止内存泄漏
    mExecutorService.shutdownNow();
    releaseRecorder();

AudioRecord的功能实现：
实现一个点击button进行录音，再次点击停止录音功能

开启录音和停止录音：

 public void recorderaudio(View view) 
        if (mIsRecording) 
            bt_stream_recorder.setText("开始录音");
            //在开始录音中如果这个值没有变false，则一直进行，当再次点击变false时，录音才停止
            mIsRecording = false;

        //执行停止录音逻辑，这块不用下面代码，只需上面变换mIsRecording这个状态就可以了，下面一直走while
      /*  mExecutorService.submit(new Runnable() 
            @Override
            public void run() 
                stopRecorder();
            
        );*/
     else 
        bt_stream_recorder.setText("停止录音");
        //提交后台任务，执行录音逻辑
        mIsRecording = true;
        //提交后台任务，执行录音逻辑
        mExecutorService.submit(new Runnable() 
            @Override
            public void run() 

                startRecorder();
            
        );
    

开启录音：

/**
 * 开始录音
 */
private void startRecorder() 
    // realeseRecorder();
    if (!dostart()) recorderFail();

AudioRecord的配置及功能实现具体代码：

private boolean dostart() 
        try 
            //记录开始录音时间
            startRecorderTime = System.currentTimeMillis();
            //创建录音文件
            mAudioRecordFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() +
                    "/recorderdemo/" + System.currentTimeMillis() + ".pcm");
            if (!mAudioRecordFile.getParentFile().exists())
                mAudioRecordFile.getParentFile().mkdirs();
            mAudioRecordFile.createNewFile();
            //创建文件输出流
            mFileOutputStream = new FileOutputStream(mAudioRecordFile);
            //配置AudioRecord
            int audioSource = MediaRecorder.AudioSource.MIC;
            //所有android系统都支持
            int sampleRate = 44100;
            //单声道输入
            int channelConfig = AudioFormat.CHANNEL_IN_MONO;
            //PCM_16是所有android系统都支持的
            int autioFormat = AudioFormat.ENCODING_PCM_16BIT;
            //计算AudioRecord内部buffer最小
            int minBufferSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, autioFormat);
            //buffer不能小于最低要求，也不能小于我们每次我们读取的大小。
            mAudioRecord = new AudioRecord(audioSource, sampleRate, channelConfig, autioFormat, Math.max(minBufferSize, BUFFER_SIZE));


        //开始录音
        mAudioRecord.startRecording();

        //循环读取数据，写入输出流中
        while (mIsRecording) 
            //只要还在录音就一直读取
            int read = mAudioRecord.read(mBuffer, 0, BUFFER_SIZE);
            if(read<=0)
                return false;
            else 
                mFileOutputStream.write(mBuffer, 0, read);
            

        

        //退出循环，停止录音，释放资源
        stopRecorder();

     catch (Exception e) 
        e.printStackTrace();
        return false;
     finally 
        if (mAudioRecord != null) 
            mAudioRecord.release();
        
    
    return true;

再次点击停止录音操作代码：

private boolean doStop() 
        //停止录音，关闭文件输出流
        mAudioRecord.stop();
        mAudioRecord.release();
        mAudioRecord = null;
        //记录结束时间，统计录音时长
        stopRecorderTime = System.currentTimeMillis();
        //大于3秒算成功，在主线程更新UI
        final int send = (int) (stopRecorderTime - startRecorderTime) / 1000;
        if (send > 3) 
            mHandler.post(new Runnable() 
                @Override
                public void run() 
                    tv_stream_msg.setText("录音成功：" + send + "秒");
                    bt_stream_recorder.setText("开始录音");
                
            );
         else 
            recorderFail();
            return false;
        
        return true;
    

录取失败，更新UI操作：

private boolean recorderFail() 
        mHandler.post(new Runnable() 
            @Override
            public void run() 
                bt_stream_recorder.setText("开始录音");
                tv_stream_msg.setText("录取失败，请重新录入");

                mIsRecording=false;
                Log.i("Tag8", "go here111111111");
            
        );

        return false;
    

播放录音代码：

 /**
     * 播放声音
     * @param view
     */
    public void player(View view)
        mExecutorService.submit(new Runnable() 
            @Override
            public void run() 
                if(!mIsPlaying)
                    Log.i("Tag8","go here");
                    mIsPlaying=true;
                    doPlay(mAudioRecordFile);
                

            
        );
    

播放录音具体实现，AudioTrack的使用：

private void doPlay(File audioFile) 
        if(audioFile !=null)
            Log.i("Tag8","go there");
            //配置播放器
            //音乐类型，扬声器播放
            int streamType= AudioManager.STREAM_MUSIC;
            //录音时采用的采样频率，所以播放时同样的采样频率
            int sampleRate=44100;
            //单声道，和录音时设置的一样
            int channelConfig=AudioFormat.CHANNEL_OUT_MONO;
            //录音时使用16bit，所以播放时同样采用该方式
            int audioFormat=AudioFormat.ENCODING_PCM_16BIT;
            //流模式
            int mode= AudioTrack.MODE_STREAM;

            //计算最小buffer大小
            int minBufferSize=AudioTrack.getMinBufferSize(sampleRate,channelConfig,audioFormat);

            //构造AudioTrack  不能小于AudioTrack的最低要求，也不能小于我们每次读的大小
            AudioTrack audioTrack=new AudioTrack(streamType,sampleRate,channelConfig,audioFormat,
                    Math.max(minBufferSize,BUFFER_SIZE),mode);

            //从文件流读数据
            FileInputStream inputStream=null;
            try
                //循环读数据，写到播放器去播放
                inputStream=new FileInputStream(audioFile);

                //循环读数据，写到播放器去播放
                int read;
                //只要没读完，循环播放
                while ((read=inputStream.read(mBuffer))>0)
                    Log.i("Tag8","read:"+read);
                    int ret=audioTrack.write(mBuffer,0,read);
                    //检查write的返回值，处理错误
                    switch (ret)
                        case AudioTrack.ERROR_INVALID_OPERATION:
                        case AudioTrack.ERROR_BAD_VALUE:
                        case AudioManager.ERROR_DEAD_OBJECT:
                            playFail();
                            return;
                        default:
                            break;
                    
                

            catch (Exception e)
                e.printStackTrace();
                //读取失败
                playFail();
            finally 
                mIsPlaying=false;
                //关闭文件输入流
                if(inputStream !=null)
                    closeStream(inputStream);
                
                //播放器释放
                resetQuietly(audioTrack);
            
        
    

AudioRecord的功能实现完整代码：

public class StreamActivity extends AppCompatActivity 
    private Button bt_stream_recorder;
    private TextView tv_stream_msg;
    private ExecutorService mExecutorService;
    private long startRecorderTime, stopRecorderTime;
    private volatile boolean mIsRecording = false;
    private AudioRecord mAudioRecord;
    private FileOutputStream mFileOutputStream;
    private File mAudioRecordFile;
    private byte[] mBuffer;
    //buffer值不能太大，避免OOM
    private static final int BUFFER_SIZE = 2048;
    private boolean mIsPlaying=false;
    private Handler mHandler = new Handler(Looper.getMainLooper());

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_stream);
        setTitle("字节流录音");
        initView();
        mExecutorService = Executors.newSingleThreadExecutor();
        mBuffer = new byte[BUFFER_SIZE];

    

    private void initView() 
        bt_stream_recorder = (Button) findViewById(R.id.bt_stream_recorder);
        tv_stream_msg = (TextView) findViewById(R.id.tv_stream_msg);

    

    public void recorderaudio(View view) 
        if (mIsRecording) 
            bt_stream_recorder.setText("开始录音");
            //在开始录音中如果这个值没有变false，则一直进行，当再次点击变false时，录音才停止
            mIsRecording = false;

            //执行停止录音逻辑，这块不用下面代码，只需上面变换mIsRecording这个状态就可以了，下面一直走while
          /*  mExecutorService.submit(new Runnable() 
                @Override
                public void run() 
                    stopRecorder();
                
            );*/
         else 

            bt_stream_recorder.setText("停止录音");
            //提交后台任务，执行录音逻辑
            mIsRecording = true;
            //提交后台任务，执行录音逻辑
            mExecutorService.submit(new Runnable() 
                @Override
                public void run() 

                    startRecorder();
                
            );
        
    

    /**
     * 开始录音
     */
    private void startRecorder() 
        // realeseRecorder();
        if (!dostart()) recorderFail();

    

    /**
     * 停止录音
     */
    private void stopRecorder() 
        mIsRecording=false;
        if (!doStop()) recorderFail();

    


    private boolean dostart() 
        try 
            //记录开始录音时间
            startRecorderTime = System.currentTimeMillis();
            //创建录音文件
            mAudioRecordFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() +
                    "/recorderdemo/" + System.currentTimeMillis() + ".pcm");
            if (!mAudioRecordFile.getParentFile().exists())
                mAudioRecordFile.getParentFile().mkdirs();
            mAudioRecordFile.createNewFile();
            //创建文件输出流
            mFileOutputStream = new FileOutputStream(mAudioRecordFile);
            //配置AudioRecord
            int audioSource = MediaRecorder.AudioSource.MIC;
            //所有android系统都支持
            int sampleRate = 44100;
            //单声道输入
            int channelConfig = AudioFormat.CHANNEL_IN_MONO;
            //PCM_16是所有android系统都支持的
            int autioFormat = AudioFormat.ENCODING_PCM_16BIT;
            //计算AudioRecord内部buffer最小
            int minBufferSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, autioFormat);
            //buffer不能小于最低要求，也不能小于我们每次我们读取的大小。
            mAudioRecord = new AudioRecord(audioSource, sampleRate, channelConfig, autioFormat, Math.max(minBufferSize, BUFFER_SIZE));


            //开始录音
            mAudioRecord.startRecording();

            //循环读取数据，写入输出流中
            while (mIsRecording) 
                //只要还在录音就一直读取
                int read = mAudioRecord.read(mBuffer, 0, BUFFER_SIZE);
                if(read<=0)
                    return false;
                else 
                    mFileOutputStream.write(mBuffer, 0, read);
                

            

            //退出循环，停止录音，释放资源
            stopRecorder();

         catch (Exception e) 
            e.printStackTrace();
            return false;
         finally 
            if (mAudioRecord != null) 
                mAudioRecord.release();
            
        
        return true;
    

    private boolean recorderFail() 
        mHandler.post(new Runnable() 
            @Override
            public void run() 
                bt_stream_recorder.setText("开始录音");
                tv_stream_msg.setText("录取失败，请重新录入");

                mIsRecording=false;
                Log.i("Tag8", "go here111111111");
            
        );

        return false;
    

    private void realeseRecorder() 
        mAudioRecord.release();
    

    private boolean doStop() 
        //停止录音，关闭文件输出流
        mAudioRecord.stop();
        mAudioRecord.release();
        mAudioRecord = null;
        Log.i("Tag8", "go here");
        //记录结束时间，统计录音时长
        stopRecorderTime = System.currentTimeMillis();
        //大于3秒算成功，在主线程更新UI
        final int send = (int) (stopRecorderTime - startRecorderTime) / 1000;
        if (send > 3) 
            mHandler.post(new Runnable() 
                @Override
                public void run() 
                    tv_stream_msg.setText("录音成功：" + send + "秒");
                    bt_stream_recorder.setText("开始录音");
                    Log.i("Tag8", "go there");
                
            );
         else 
            recorderFail();
            return false;
        
        return true;
    

    /**
     * 播放声音
     * @param view
     */
    public void player(View view)
        mExecutorService.submit(new Runnable() 
            @Override
            public void run() 
                if(!mIsPlaying)
                    Log.i("Tag8","go here");
                    mIsPlaying=true;
                    doPlay(mAudioRecordFile);
                

            
        );
    

    private void doPlay(File audioFile) 
        if(audioFile !=null)
            Log.i("Tag8","go there");
            //配置播放器
            //音乐类型，扬声器播放
            int streamType= AudioManager.STREAM_MUSIC;
            //录音时采用的采样频率，所以播放时同样的采样频率
            int sampleRate=44100;
            //单声道，和录音时设置的一样
            int channelConfig=AudioFormat.CHANNEL_OUT_MONO;
            //录音时使用16bit，所以播放时同样采用该方式
            int audioFormat=AudioFormat.ENCODING_PCM_16BIT;
            //流模式
            int mode= AudioTrack.MODE_STREAM;

            //计算最小buffer大小
            int minBufferSize=AudioTrack.getMinBufferSize(sampleRate,channelConfig,audioFormat);

            //构造AudioTrack  不能小于AudioTrack的最低要求，也不能小于我们每次读的大小
            AudioTrack audioTrack=new AudioTrack(streamType,sampleRate,channelConfig,audioFormat,
                    Math.max(minBufferSize,BUFFER_SIZE),mode);

            //从文件流读数据
            FileInputStream inputStream=null;
            try
                //循环读数据，写到播放器去播放
                inputStream=new FileInputStream(audioFile);

                //循环读数据，写到播放器去播放
                int read;
                //只要没读完，循环播放
                while ((read=inputStream.read(mBuffer))>0)
                    Log.i("Tag8","read:"+read);
                    int ret=audioTrack.write(mBuffer,0,read);
                    //检查write的返回值，处理错误
                    switch (ret)
                        case AudioTrack.ERROR_INVALID_OPERATION:
                        case AudioTrack.ERROR_BAD_VALUE:
                        case AudioManager.ERROR_DEAD_OBJECT:
                            playFail();
                            return;
                        default:
                            break;
                    
                

            catch (Exception e)
                e.printStackTrace();
                //读取失败
                playFail();
            finally 
                mIsPlaying=false;
                //关闭文件输入流
                if(inputStream !=null)
                    closeStream(inputStream);
                
                //播放器释放
                resetQuietly(audioTrack);
            

            //循环读数据，写到播放器去播放


            //错误处理，防止闪退

        
    

    /**
     * 关闭输入流
     * @param inputStream
     */
    private void closeStream(FileInputStream inputStream)
        try 
            inputStream.close();
         catch (IOException e) 
            e.printStackTrace();
        
    

    private void resetQuietly(AudioTrack audioTrack)
        try
            audioTrack.stop();
            audioTrack.release();
        catch (Exception e)
            e.printStackTrace();
        
    


    /**
     * 播放失败
     */
    private void playFail() 
        mHandler.post(new Runnable() 
            @Override
            public void run() 
                tv_stream_msg.setText("播放失败");
            
        );
    

    @Override
    protected void onDestroy() 
        super.onDestroy();
        if (mExecutorService != null) 
            mExecutorService.shutdownNow();
        
        if (mAudioRecord != null) 
            mAudioRecord.stop();
            mAudioRecord.release();
            mAudioRecord = null;
        
    

转载至：http://blog.csdn.net/zxyudia/article/details/68948751