Android使用AudioRecord实现暂停录音功能实例代码

package com.hxl.pauserecord.record;  import android.media.AudioFormat; import android.media.AudioRecord; import android.media.MediaRecorder; import android.text.TextUtils; import android.util.Log;  import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors;  /**  * Created by HXL on 16/8/11.  * 用于实现录音 暂停录音  */ public class AudioRecorder {  //音频输入-麦克风  private final static int AUDIO_INPUT = MediaRecorder.AudioSource.MIC;  //采用频率  //44100是目前的标准，但是某些设备仍然支持22050，16000，11025  //采样频率一般共分为22.05KHz、44.1KHz、48KHz三个等级  private final static int AUDIO_SAMPLE_RATE = 16000;  //声道 单声道  private final static int AUDIO_CHANNEL = AudioFormat.CHANNEL_IN_MONO;  //编码  private final static int AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;  // 缓冲区字节大小  private int bufferSizeInBytes = 0;   //录音对象  private AudioRecord audioRecord;   //录音状态  private Status status = Status.STATUS_NO_READY;   //文件名  private String fileName;   //录音文件  private List<String> filesName = new ArrayList<>();   //线程池  private ExecutorService mExecutorService;   //录音监听  private RecordStreamListener listener;    public AudioRecorder() {   mExecutorService = Executors.newCachedThreadPool();  }   /**   * 创建录音对象   */  public void createAudio(String fileName, int audioSource, int sampleRateInHz, int channelConfig, int audioFormat) {   // 获得缓冲区字节大小   bufferSizeInBytes = AudioRecord.getMinBufferSize(sampleRateInHz,     channelConfig, channelConfig);   audioRecord = new AudioRecord(audioSource, sampleRateInHz, channelConfig, audioFormat, bufferSizeInBytes);   this.fileName = fileName;  }   /**   * 创建默认的录音对象   *   * @param fileName 文件名   */  public void createDefaultAudio(String fileName) {   // 获得缓冲区字节大小   bufferSizeInBytes = AudioRecord.getMinBufferSize(AUDIO_SAMPLE_RATE,     AUDIO_CHANNEL, AUDIO_ENCODING);   audioRecord = new AudioRecord(AUDIO_INPUT, AUDIO_SAMPLE_RATE, AUDIO_CHANNEL, AUDIO_ENCODING, bufferSizeInBytes);   this.fileName = fileName;   status = Status.STATUS_READY;  }    /**   * 开始录音   *   */  public void startRecord() {    if (status == Status.STATUS_NO_READY||audioRecord==null) {    throw new IllegalStateException("录音尚未初始化,请检查是否禁止了录音权限~");   }   if (status == Status.STATUS_START) {    throw new IllegalStateException("正在录音");   }   Log.d("AudioRecorder", "===startRecord===" + audioRecord.getState());   audioRecord.startRecording();    String currentFileName = fileName;   if (status == Status.STATUS_PAUSE) {    //假如是暂停录音 将文件名后面加个数字,防止重名文件内容被覆盖    currentFileName += filesName.size();    }   filesName.add(currentFileName);    final String finalFileName=currentFileName;   //将录音状态设置成正在录音状态   status = Status.STATUS_START;    //使用线程池管理线程   mExecutorService.execute(new Runnable() {    @Override    public void run() {     writeDataTOFile(finalFileName);    }   });  }   /**   * 暂停录音   */  public void pauseRecord() {   Log.d("AudioRecorder", "===pauseRecord===");   if (status != Status.STATUS_START) {    throw new IllegalStateException("没有在录音");   } else {    audioRecord.stop();    status = Status.STATUS_PAUSE;   }  }   /**   * 停止录音   */  public void stopRecord() {   Log.d("AudioRecorder", "===stopRecord===");   if (status == Status.STATUS_NO_READY || status == Status.STATUS_READY) {    throw new IllegalStateException("录音尚未开始");   } else {    audioRecord.stop();    status = Status.STATUS_STOP;    release();   }  }   /**   * 释放资源   */  public void release() {   Log.d("AudioRecorder", "===release===");   //假如有暂停录音   try {    if (filesName.size() > 0) {     List<String> filePaths = new ArrayList<>();     for (String fileName : filesName) {      filePaths.add(FileUtils.getPcmFileAbsolutePath(fileName));     }     //清除     filesName.clear();     //将多个pcm文件转化为wav文件     mergePCMFilesToWAVFile(filePaths);     } else {     //这里由于只要录音过filesName.size都会大于0,没录音时fileName为null     //会报空指针 NullPointerException     // 将单个pcm文件转化为wav文件     //Log.d("AudioRecorder", "=====makePCMFileToWAVFile======");     //makePCMFileToWAVFile();    }   } catch (IllegalStateException e) {    throw new IllegalStateException(e.getMessage());   }    if (audioRecord != null) {    audioRecord.release();    audioRecord = null;   }    status = Status.STATUS_NO_READY;  }   /**   * 取消录音   */  public void canel() {   filesName.clear();   fileName = null;   if (audioRecord != null) {    audioRecord.release();    audioRecord = null;   }    status = Status.STATUS_NO_READY;  }    /**   * 将音频信息写入文件   *   */  private void writeDataTOFile(String currentFileName) {   // new一个byte数组用来存一些字节数据，大小为缓冲区大小   byte[] audiodata = new byte[bufferSizeInBytes];    FileOutputStream fos = null;   int readsize = 0;   try {    File file = new File(FileUtils.getPcmFileAbsolutePath(currentFileName));    if (file.exists()) {     file.delete();    }    fos = new FileOutputStream(file);// 建立一个可存取字节的文件   } catch (IllegalStateException e) {    Log.e("AudioRecorder", e.getMessage());    throw new IllegalStateException(e.getMessage());   } catch (FileNotFoundException e) {    Log.e("AudioRecorder", e.getMessage());    }   while (status == Status.STATUS_START) {    readsize = audioRecord.read(audiodata, 0, bufferSizeInBytes);    if (AudioRecord.ERROR_INVALID_OPERATION != readsize && fos != null) {     try {      fos.write(audiodata);      if (listener != null) {       //用于拓展业务       listener.onRecording(audiodata, 0, audiodata.length);      }     } catch (IOException e) {      Log.e("AudioRecorder", e.getMessage());     }    }   }   if (listener != null) {    listener.finishRecord();   }   try {    if (fos != null) {     fos.close();// 关闭写入流    }   } catch (IOException e) {    Log.e("AudioRecorder", e.getMessage());   }  }   /**   * 将pcm合并成wav   *   * @param filePaths   */  private void mergePCMFilesToWAVFile(final List<String> filePaths) {   mExecutorService.execute(new Runnable() {    @Override    public void run() {     if (PcmToWav.mergePCMFilesToWAVFile(filePaths, FileUtils.getWavFileAbsolutePath(fileName))) {      //操作成功     } else {      //操作失败      Log.e("AudioRecorder", "mergePCMFilesToWAVFile fail");      throw new IllegalStateException("mergePCMFilesToWAVFile fail");     }    }   });  }   /**   * 将单个pcm文件转化为wav文件   */  private void makePCMFileToWAVFile() {   mExecutorService.execute(new Runnable() {    @Override    public void run() {     if (PcmToWav.makePCMFileToWAVFile(FileUtils.getPcmFileAbsolutePath(fileName), FileUtils.getWavFileAbsolutePath(fileName), true)) {      //操作成功     } else {      //操作失败      Log.e("AudioRecorder", "makePCMFileToWAVFile fail");      throw new IllegalStateException("makePCMFileToWAVFile fail");     }    }   });  }    /**   * 录音对象的状态   */  public enum Status {   //未开始   STATUS_NO_READY,   //预备   STATUS_READY,   //录音   STATUS_START,   //暂停   STATUS_PAUSE,   //停止   STATUS_STOP  }   /**   * 获取录音对象的状态   *   * @return   */  public Status getStatus() {   return status;  }   /**   * 获取本次录音文件的个数   *   * @return   */  public int getPcmFilesCount() {   return filesName.size();  }    public RecordStreamListener getListener() {   return listener;  }   public void setListener(RecordStreamListener listener) {   this.listener = listener;  }  } 

package com.hxl.pauserecord.record;  import android.util.Log;  import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List;  /**  * Created by HXL on 16/8/11.  * 将pcm文件转化为wav文件  */ public class PcmToWav {  /**   * 合并多个pcm文件为一个wav文件   *   * @param filePathList pcm文件路径集合   * @param destinationPath 目标wav文件路径   * @return true|false   */  public static boolean mergePCMFilesToWAVFile(List<String> filePathList,              String destinationPath) {   File[] file = new File[filePathList.size()];   byte buffer[] = null;    int TOTAL_SIZE = 0;   int fileNum = filePathList.size();    for (int i = 0; i < fileNum; i++) {    file[i] = new File(filePathList.get(i));    TOTAL_SIZE += file[i].length();   }    // 填入参数，比特率等等。这里用的是16位单声道 8000 hz   WaveHeader header = new WaveHeader();   // 长度字段 = 内容的大小（TOTAL_SIZE) +   // 头部字段的大小(不包括前面4字节的标识符RIFF以及fileLength本身的4字节)   header.fileLength = TOTAL_SIZE + (44 - 8);   header.FmtHdrLeth = 16;   header.BitsPerSample = 16;   header.Channels = 2;   header.FormatTag = 0x0001;   header.SamplesPerSec = 8000;   header.BlockAlign = (short) (header.Channels * header.BitsPerSample / 8);   header.AvgBytesPerSec = header.BlockAlign * header.SamplesPerSec;   header.DataHdrLeth = TOTAL_SIZE;    byte[] h = null;   try {    h = header.getHeader();   } catch (IOException e1) {    Log.e("PcmToWav", e1.getMessage());    return false;   }    if (h.length != 44) // WAV标准，头部应该是44字节,如果不是44个字节则不进行转换文件    return false;    //先删除目标文件   File destfile = new File(destinationPath);   if (destfile.exists())    destfile.delete();    //合成所有的pcm文件的数据，写到目标文件   try {    buffer = new byte[1024 * 4]; // Length of All Files, Total Size    InputStream inStream = null;    OutputStream ouStream = null;     ouStream = new BufferedOutputStream(new FileOutputStream(      destinationPath));    ouStream.write(h, 0, h.length);    for (int j = 0; j < fileNum; j++) {     inStream = new BufferedInputStream(new FileInputStream(file[j]));     int size = inStream.read(buffer);     while (size != -1) {      ouStream.write(buffer);      size = inStream.read(buffer);     }     inStream.close();    }    ouStream.close();   } catch (FileNotFoundException e) {    Log.e("PcmToWav", e.getMessage());    return false;   } catch (IOException ioe) {    Log.e("PcmToWav", ioe.getMessage());    return false;   }   clearFiles(filePathList);   Log.i("PcmToWav", "mergePCMFilesToWAVFile success!" + new SimpleDateFormat("yyyy-MM-dd hh:mm").format(new Date()));   return true;   }   /**   * 将一个pcm文件转化为wav文件   *   * @param pcmPath   pcm文件路径   * @param destinationPath 目标文件路径(wav)   * @param deletePcmFile 是否删除源文件   * @return   */  public static boolean makePCMFileToWAVFile(String pcmPath, String destinationPath, boolean deletePcmFile) {   byte buffer[] = null;   int TOTAL_SIZE = 0;   File file = new File(pcmPath);   if (!file.exists()) {    return false;   }   TOTAL_SIZE = (int) file.length();   // 填入参数，比特率等等。这里用的是16位单声道 8000 hz   WaveHeader header = new WaveHeader();   // 长度字段 = 内容的大小（TOTAL_SIZE) +   // 头部字段的大小(不包括前面4字节的标识符RIFF以及fileLength本身的4字节)   header.fileLength = TOTAL_SIZE + (44 - 8);   header.FmtHdrLeth = 16;   header.BitsPerSample = 16;   header.Channels = 2;   header.FormatTag = 0x0001;   header.SamplesPerSec = 8000;   header.BlockAlign = (short) (header.Channels * header.BitsPerSample / 8);   header.AvgBytesPerSec = header.BlockAlign * header.SamplesPerSec;   header.DataHdrLeth = TOTAL_SIZE;    byte[] h = null;   try {    h = header.getHeader();   } catch (IOException e1) {    Log.e("PcmToWav", e1.getMessage());    return false;   }    if (h.length != 44) // WAV标准，头部应该是44字节,如果不是44个字节则不进行转换文件    return false;    //先删除目标文件   File destfile = new File(destinationPath);   if (destfile.exists())    destfile.delete();    //合成所有的pcm文件的数据，写到目标文件   try {    buffer = new byte[1024 * 4]; // Length of All Files, Total Size    InputStream inStream = null;    OutputStream ouStream = null;     ouStream = new BufferedOutputStream(new FileOutputStream(      destinationPath));    ouStream.write(h, 0, h.length);    inStream = new BufferedInputStream(new FileInputStream(file));    int size = inStream.read(buffer);    while (size != -1) {     ouStream.write(buffer);     size = inStream.read(buffer);    }    inStream.close();    ouStream.close();   } catch (FileNotFoundException e) {    Log.e("PcmToWav", e.getMessage());    return false;   } catch (IOException ioe) {    Log.e("PcmToWav", ioe.getMessage());    return false;   }   if (deletePcmFile) {    file.delete();   }   Log.i("PcmToWav", "makePCMFileToWAVFile success!" + new SimpleDateFormat("yyyy-MM-dd hh:mm").format(new Date()));   return true;   }   /**   * 清除文件   *   * @param filePathList   */  private static void clearFiles(List<String> filePathList) {   for (int i = 0; i < filePathList.size(); i++) {    File file = new File(filePathList.get(i));    if (file.exists()) {     file.delete();    }   }  }  } 

package com.hxl.pauserecord.record;  import java.io.ByteArrayOutputStream; import java.io.IOException;  /**  * Created by HXL on 16/3/9.  * wav文件头  */ public class WaveHeader {  public final char fileID[] = {'R', 'I', 'F', 'F'};  public int fileLength;  public char wavTag[] = {'W', 'A', 'V', 'E'};;  public char FmtHdrID[] = {'f', 'm', 't', ' '};  public int FmtHdrLeth;  public short FormatTag;  public short Channels;  public int SamplesPerSec;  public int AvgBytesPerSec;  public short BlockAlign;  public short BitsPerSample;  public char DataHdrID[] = {'d','a','t','a'};  public int DataHdrLeth;   public byte[] getHeader() throws IOException {   ByteArrayOutputStream bos = new ByteArrayOutputStream();   WriteChar(bos, fileID);   WriteInt(bos, fileLength);   WriteChar(bos, wavTag);   WriteChar(bos, FmtHdrID);   WriteInt(bos,FmtHdrLeth);   WriteShort(bos,FormatTag);   WriteShort(bos,Channels);   WriteInt(bos,SamplesPerSec);   WriteInt(bos,AvgBytesPerSec);   WriteShort(bos,BlockAlign);   WriteShort(bos,BitsPerSample);   WriteChar(bos,DataHdrID);   WriteInt(bos,DataHdrLeth);   bos.flush();   byte[] r = bos.toByteArray();   bos.close();   return r;  }   private void WriteShort(ByteArrayOutputStream bos, int s) throws IOException {   byte[] mybyte = new byte[2];   mybyte[1] =(byte)( (s << 16) >> 24 );   mybyte[0] =(byte)( (s << 24) >> 24 );   bos.write(mybyte);  }    private void WriteInt(ByteArrayOutputStream bos, int n) throws IOException {   byte[] buf = new byte[4];   buf[3] =(byte)( n >> 24 );   buf[2] =(byte)( (n << 8) >> 24 );   buf[1] =(byte)( (n << 16) >> 24 );   buf[0] =(byte)( (n << 24) >> 24 );   bos.write(buf);  }   private void WriteChar(ByteArrayOutputStream bos, char[] id) {   for (int i=0; i<id.length; i++) {    char c = id[i];    bos.write(c);   }  } }