Android使用AudioRecord實(shí)現(xiàn)暫停錄音功能實(shí)例代碼

更新時(shí)間：2017年06月28日 14:23:27 作者：imhxl

本篇文章主要介紹了Android使用AudioRecord實(shí)現(xiàn)暫停錄音功能實(shí)例代碼，具有一定的參考價(jià)值，有興趣的可以了解一下

題外話(huà)：發(fā)現(xiàn)好久都沒(méi)有上來(lái)寫(xiě)博文了，畢業(yè)設(shè)計(jì)加上公司暫時(shí)沒(méi)有Android的項(xiàng)目做，只能去自學(xué)web上的知識(shí)，摸爬打滾到現(xiàn)在，花了一個(gè)多月時(shí)間根據(jù)公司的現(xiàn)有模板做了公司內(nèi)部一個(gè)任務(wù)管理系統(tǒng)，感覺(jué)都是比較淺的知識(shí)，沒(méi)什么可以寫(xiě)的。想到之前做的語(yǔ)音識(shí)別的項(xiàng)目，雖然現(xiàn)在沒(méi)什么下文了，但是誰(shuí)懂~~~將來(lái)呢？

言歸正傳，項(xiàng)目長(zhǎng)這樣子：

設(shè)計(jì)的思路：

由于自帶的AudioRecord沒(méi)有pauseRecord()方法，我把開(kāi)始錄音-->（暫停/繼續(xù)錄音）...-->停止錄音叫做一次錄音，點(diǎn)擊一次暫停就會(huì)產(chǎn)生一個(gè)文件(.pcm)，將一次錄音產(chǎn)生的所有文件名(.pcm)用一個(gè)list裝起來(lái)，點(diǎn)擊停止后將遍歷list取得所有文件路徑進(jìn)行拼接。

由于考慮到以后可能要進(jìn)行語(yǔ)音識(shí)別，所以對(duì)程序的靈活性和拓展性都做了相應(yīng)的處理，可以通過(guò)setListener()監(jiān)聽(tīng)錄音的音頻流和監(jiān)聽(tīng)錄音結(jié)束。

采用線(xiàn)程池對(duì)線(xiàn)程進(jìn)行管理，減少系統(tǒng)開(kāi)銷(xiāo)。

對(duì)類(lèi)的說(shuō)明：

AudioRecorder：封裝了錄音的方法：創(chuàng)建錄音對(duì)象、開(kāi)始、暫停、停止、取消，使用靜態(tài)枚舉類(lèi)Status來(lái)記錄錄音的狀態(tài)。
FileUtils：文件工具類(lèi)，用于文件路徑的獲取
PcmToWav：封裝了將.pcm文件轉(zhuǎn)化.wav文件的方法
WaveHeader： wav文件頭
RecordStreamListener：監(jiān)聽(tīng)錄音音頻流，用于拓展業(yè)務(wù)的處理

接下來(lái)是關(guān)鍵代碼部分：
1、AudioRecorder類(lèi)：

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. 
 * 用于實(shí)現(xiàn)錄音 暫停錄音 
 */ 
public class AudioRecorder { 
 //音頻輸入-麥克風(fēng) 
 private final static int AUDIO_INPUT = MediaRecorder.AudioSource.MIC; 
 //采用頻率 
 //44100是目前的標(biāo)準(zhǔn)，但是某些設(shè)備仍然支持22050，16000，11025 
 //采樣頻率一般共分為22.05KHz、44.1KHz、48KHz三個(gè)等級(jí) 
 private final static int AUDIO_SAMPLE_RATE = 16000; 
 //聲道 單聲道 
 private final static int AUDIO_CHANNEL = AudioFormat.CHANNEL_IN_MONO; 
 //編碼 
 private final static int AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT; 
 // 緩沖區(qū)字節(jié)大小 
 private int bufferSizeInBytes = 0; 
 
 //錄音對(duì)象 
 private AudioRecord audioRecord; 
 
 //錄音狀態(tài) 
 private Status status = Status.STATUS_NO_READY; 
 
 //文件名 
 private String fileName; 
 
 //錄音文件 
 private List<String> filesName = new ArrayList<>(); 
 
 //線(xiàn)程池 
 private ExecutorService mExecutorService; 
 
 //錄音監(jiān)聽(tīng) 
 private RecordStreamListener listener; 
 
 
 public AudioRecorder() { 
  mExecutorService = Executors.newCachedThreadPool(); 
 } 
 
 /** 
  * 創(chuàng)建錄音對(duì)象 
  */ 
 public void createAudio(String fileName, int audioSource, int sampleRateInHz, int channelConfig, int audioFormat) { 
  // 獲得緩沖區(qū)字節(jié)大小 
  bufferSizeInBytes = AudioRecord.getMinBufferSize(sampleRateInHz, 
    channelConfig, channelConfig); 
  audioRecord = new AudioRecord(audioSource, sampleRateInHz, channelConfig, audioFormat, bufferSizeInBytes); 
  this.fileName = fileName; 
 } 
 
 /** 
  * 創(chuàng)建默認(rèn)的錄音對(duì)象 
  * 
  * @param fileName 文件名 
  */ 
 public void createDefaultAudio(String fileName) { 
  // 獲得緩沖區(qū)字節(jié)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; 
 } 
 
 
 /** 
  * 開(kāi)始錄音 
  * 
  */ 
 public void startRecord() { 
 
  if (status == Status.STATUS_NO_READY||audioRecord==null) { 
   throw new IllegalStateException("錄音尚未初始化,請(qǐng)檢查是否禁止了錄音權(quán)限~"); 
  } 
  if (status == Status.STATUS_START) { 
   throw new IllegalStateException("正在錄音"); 
  } 
  Log.d("AudioRecorder", "===startRecord===" + audioRecord.getState()); 
  audioRecord.startRecording(); 
 
  String currentFileName = fileName; 
  if (status == Status.STATUS_PAUSE) { 
   //假如是暫停錄音 將文件名后面加個(gè)數(shù)字,防止重名文件內(nèi)容被覆蓋 
   currentFileName += filesName.size(); 
 
  } 
  filesName.add(currentFileName); 
 
  final String finalFileName=currentFileName; 
  //將錄音狀態(tài)設(shè)置成正在錄音狀態(tài) 
  status = Status.STATUS_START; 
 
  //使用線(xiàn)程池管理線(xiàn)程 
  mExecutorService.execute(new Runnable() { 
   @Override 
   public void run() { 
    writeDataTOFile(finalFileName); 
   } 
  }); 
 } 
 
 /** 
  * 暫停錄音 
  */ 
 public void pauseRecord() { 
  Log.d("AudioRecorder", "===pauseRecord==="); 
  if (status != Status.STATUS_START) { 
   throw new IllegalStateException("沒(méi)有在錄音"); 
  } else { 
   audioRecord.stop(); 
   status = Status.STATUS_PAUSE; 
  } 
 } 
 
 /** 
  * 停止錄音 
  */ 
 public void stopRecord() { 
  Log.d("AudioRecorder", "===stopRecord==="); 
  if (status == Status.STATUS_NO_READY || status == Status.STATUS_READY) { 
   throw new IllegalStateException("錄音尚未開(kāi)始"); 
  } else { 
   audioRecord.stop(); 
   status = Status.STATUS_STOP; 
   release(); 
  } 
 } 
 
 /** 
  * 釋放資源 
  */ 
 public void release() { 
  Log.d("AudioRecorder", "===release==="); 
  //假如有暫停錄音 
  try { 
   if (filesName.size() > 0) { 
    List<String> filePaths = new ArrayList<>(); 
    for (String fileName : filesName) { 
     filePaths.add(FileUtils.getPcmFileAbsolutePath(fileName)); 
    } 
    //清除 
    filesName.clear(); 
    //將多個(gè)pcm文件轉(zhuǎn)化為wav文件 
    mergePCMFilesToWAVFile(filePaths); 
 
   } else { 
    //這里由于只要錄音過(guò)filesName.size都會(huì)大于0,沒(méi)錄音時(shí)fileName為null 
    //會(huì)報(bào)空指針 NullPointerException 
    // 將單個(gè)pcm文件轉(zhuǎn)化為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; 
 } 
 
 /** 
  * 取消錄音 
  */ 
 public void canel() { 
  filesName.clear(); 
  fileName = null; 
  if (audioRecord != null) { 
   audioRecord.release(); 
   audioRecord = null; 
  } 
 
  status = Status.STATUS_NO_READY; 
 } 
 
 
 /** 
  * 將音頻信息寫(xiě)入文件 
  * 
  */ 
 private void writeDataTOFile(String currentFileName) { 
  // new一個(gè)byte數(shù)組用來(lái)存一些字節(jié)數(shù)據(jù)，大小為緩沖區(qū)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);// 建立一個(gè)可存取字節(jié)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) { 
      //用于拓展業(yè)務(wù) 
      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();// 關(guān)閉寫(xiě)入流 
   } 
  } catch (IOException e) { 
   Log.e("AudioRecorder", e.getMessage()); 
  } 
 } 
 
 /** 
  * 將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 { 
     //操作失敗 
     Log.e("AudioRecorder", "mergePCMFilesToWAVFile fail"); 
     throw new IllegalStateException("mergePCMFilesToWAVFile fail"); 
    } 
   } 
  }); 
 } 
 
 /** 
  * 將單個(gè)pcm文件轉(zhuǎn)化為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 { 
     //操作失敗 
     Log.e("AudioRecorder", "makePCMFileToWAVFile fail"); 
     throw new IllegalStateException("makePCMFileToWAVFile fail"); 
    } 
   } 
  }); 
 } 
 
 
 /** 
  * 錄音對(duì)象的狀態(tài) 
  */ 
 public enum Status { 
  //未開(kāi)始 
  STATUS_NO_READY, 
  //預(yù)備 
  STATUS_READY, 
  //錄音 
  STATUS_START, 
  //暫停 
  STATUS_PAUSE, 
  //停止 
  STATUS_STOP 
 } 
 
 /** 
  * 獲取錄音對(duì)象的狀態(tài) 
  * 
  * @return 
  */ 
 public Status getStatus() { 
  return status; 
 } 
 
 /** 
  * 獲取本次錄音文件的個(gè)數(shù) 
  * 
  * @return 
  */ 
 public int getPcmFilesCount() { 
  return filesName.size(); 
 } 
 
 
 public RecordStreamListener getListener() { 
  return listener; 
 } 
 
 public void setListener(RecordStreamListener listener) { 
  this.listener = listener; 
 } 
 
}

2：PcmToWav

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. 
 * 將pcm文件轉(zhuǎn)化為wav文件 
 */ 
public class PcmToWav { 
 /** 
  * 合并多個(gè)pcm文件為一個(gè)wav文件 
  * 
  * @param filePathList pcm文件路徑集合 
  * @param destinationPath 目標(biāo)wav文件路徑 
  * @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?yún)?shù)，比特率等等。這里用的是16位單聲道 8000 hz 
  WaveHeader header = new WaveHeader(); 
  // 長(zhǎng)度字段 = 內(nèi)容的大?。═OTAL_SIZE) + 
  // 頭部字段的大小(不包括前面4字節(jié)的標(biāo)識(shí)符RIFF以及fileLength本身的4字節(jié)) 
  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標(biāo)準(zhǔn)，頭部應(yīng)該是44字節(jié),如果不是44個(gè)字節(jié)則不進(jìn)行轉(zhuǎn)換文件 
   return false; 
 
  //先刪除目標(biāo)文件 
  File destfile = new File(destinationPath); 
  if (destfile.exists()) 
   destfile.delete(); 
 
  //合成所有的pcm文件的數(shù)據(jù)，寫(xiě)到目標(biāo)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; 
 
 } 
 
 /** 
  * 將一個(gè)pcm文件轉(zhuǎn)化為wav文件 
  * 
  * @param pcmPath   pcm文件路徑 
  * @param destinationPath 目標(biāo)文件路徑(wav) 
  * @param deletePcmFile 是否刪除源文件 
  * @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?yún)?shù)，比特率等等。這里用的是16位單聲道 8000 hz 
  WaveHeader header = new WaveHeader(); 
  // 長(zhǎng)度字段 = 內(nèi)容的大?。═OTAL_SIZE) + 
  // 頭部字段的大小(不包括前面4字節(jié)的標(biāo)識(shí)符RIFF以及fileLength本身的4字節(jié)) 
  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標(biāo)準(zhǔn)，頭部應(yīng)該是44字節(jié),如果不是44個(gè)字節(jié)則不進(jìn)行轉(zhuǎn)換文件 
   return false; 
 
  //先刪除目標(biāo)文件 
  File destfile = new File(destinationPath); 
  if (destfile.exists()) 
   destfile.delete(); 
 
  //合成所有的pcm文件的數(shù)據(jù)，寫(xiě)到目標(biāo)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(); 
   } 
  } 
 } 
 
}

3、WaveHeader類(lèi)：

package com.hxl.pauserecord.record; 
 
import java.io.ByteArrayOutputStream; 
import java.io.IOException; 
 
/** 
 * Created by HXL on 16/3/9. 
 * wav文件頭 
 */ 
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); 
  } 
 } 
}

接下來(lái)是效果圖。。。個(gè)人為人做APP界面一定要美觀，而且要非常美觀，不然誰(shuí)會(huì)用你的東西！so~~