android 录音源代码（实现暂停功能）

package com.android.record; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Activity; import android.graphics.PixelFormat; import android.media.AudioFormat; import android.media.AudioRecord; import android.media.MediaRecorder; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.view.WindowManager; import android.widget.Button; import android.widget.ImageButton; /** * class name：TestAudioRecord<BR> * class description：用AudioRecord来进行录音<BR> * PS： <BR> * * @version 1.00 2011/09/21 * @author CODYY)peijiangping */ public class TestAudioRecord extends Activity { // 音频获取源 private int audioSource = MediaRecorder.AudioSource.MIC; // 设置音频采样率，44100是目前的标准，但是某些设备仍然支持22050，16000，11025 private static int sampleRateInHz = 8000; // 设置音频的录制的声道CHANNEL_IN_STEREO为双声道，CHANNEL_CONFIGURATION_MONO为单声道 private static int channelConfig = AudioFormat.CHANNEL_IN_STEREO; // 音频数据格式:PCM 16位每个样本。保证设备支持。PCM 8位每个样本。不一定能得到设备支持。 private static int audioFormat = AudioFormat.ENCODING_PCM_16BIT; // 缓冲区字节大小 private int bufferSizeInBytes = 0; private Button mRecordButton; private Button mStopButton; private Button mPauseButton; private Button mPlayButton; private AudioRecord audioRecord; private boolean isRecord = false;// 设置正在录制的状态 //AudioName裸音频数据文件 private static final String AudioName = "/sdcard/love.3gpp"; //NewAudioName可播放的音频文件 private static final String NewAudioName = "/sdcard/new.wav"; private int mPause = 0; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().setFormat(PixelFormat.TRANSLUCENT);// 让界面横屏 requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉界面标题 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // 重新设置界面大小 setContentView(R.layout.main); init(); } private void init() { mRecordButton = (Button) this.findViewById(R.id.recordButton); mStopButton = (Button) this.findViewById(R.id.stopButton); mPauseButton = (Button) this.findViewById(R.id.pauseButton); mPlayButton = (Button) this.findViewById(R.id.playButton); mRecordButton.setOnClickListener(new TestAudioListener()); mStopButton.setOnClickListener(new TestAudioListener()); mPauseButton.setOnClickListener(new TestAudioListener()); creatAudioRecord(); } private void creatAudioRecord() { // 获得缓冲区字节大小 bufferSizeInBytes = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat); // 创建AudioRecord对象 audioRecord = new AudioRecord(audioSource, sampleRateInHz, channelConfig, audioFormat, bufferSizeInBytes); } class TestAudioListener implements OnClickListener { @Override public void onClick(View v) { if (v == mRecordButton) { mPause = 0; startRecord(); } if (v == mStopButton) { stopRecord(); } if(v == mPauseButton){ if(mPause == 1) mPause = 0; else { mPause = 1; } } } } private void startRecord() { audioRecord.startRecording(); // 让录制状态为true isRecord = true; // 开启音频文件写入线程 new Thread(new AudioRecordThread()).start(); } private void stopRecord() { close(); } private void close() { if (audioRecord != null) { System.out.println("stopRecord"); isRecord = false;//停止文件写入 audioRecord.stop(); audioRecord.release();//释放资源 audioRecord = null; } } class AudioRecordThread implements Runnable { @Override public void run() { writeDateTOFile();//往文件中写入裸数据 copyWaveFile(AudioName, NewAudioName);//给裸数据加上头文件 } } /** * 这里将数据写入文件，但是并不能播放，因为AudioRecord获得的音频是原始的裸音频， * 如果需要播放就必须加入一些格式或者编码的头信息。但是这样的好处就是你可以对音频的 裸数据进行处理，比如你要做一个爱说话的TOM * 猫在这里就进行音频的处理，然后重新封装 所以说这样得到的音频比较容易做一些音频的处理。 */ private void writeDateTOFile() { // 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(AudioName); if (file.exists()) { file.delete(); } fos = new FileOutputStream(file);// 建立一个可存取字节的文件 } catch (Exception e) { e.printStackTrace(); } int i = 0; while (isRecord == true) { readsize = audioRecord.read(audiodata, 0, bufferSizeInBytes); if (AudioRecord.ERROR_INVALID_OPERATION != readsize) { try { if(mPause == 0) fos.write(audiodata); System.out.println("i:"+i); i++; } catch (IOException e) { e.printStackTrace(); } } } try { fos.close();// 关闭写入流 } catch (IOException e) { e.printStackTrace(); } } // 这里得到可播放的音频文件 private void copyWaveFile(String inFilename, String outFilename) { FileInputStream in = null; FileOutputStream out = null; long totalAudioLen = 0; long totalDataLen = totalAudioLen + 36; long longSampleRate = sampleRateInHz; int channels = 2; long byteRate = 16 * sampleRateInHz * channels / 8; byte[] data = new byte[bufferSizeInBytes]; try { in = new FileInputStream(inFilename); out = new FileOutputStream(outFilename); totalAudioLen = in.getChannel().size(); totalDataLen = totalAudioLen + 36; int j = 0; WriteWaveFileHeader(out, totalAudioLen, totalDataLen, longSampleRate, channels, byteRate); while (in.read(data) != -1) { out.write(data); System.out.println("j:"+j); j++; //out.flush(); } in.close(); out.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } /** * 这里提供一个头信息。插入这些信息就可以得到可以播放的文件。 * 为我为啥插入这44个字节，这个还真没深入研究，不过你随便打开一个wav * 音频的文件，可以发现前面的头文件可以说基本一样哦。每种格式的文件都有 * 自己特有的头文件。 */ private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen, long totalDataLen, long longSampleRate, int channels, long byteRate) throws IOException { byte[] header = new byte[44]; header[0] = 'R'; // RIFF/WAVE header header[1] = 'I'; header[2] = 'F'; header[3] = 'F'; header[4] = (byte) (totalDataLen & 0xff); header[5] = (byte) ((totalDataLen >> 8) & 0xff); header[6] = (byte) ((totalDataLen >> 16) & 0xff); header[7] = (byte) ((totalDataLen >> 24) & 0xff); header[8] = 'W'; header[9] = 'A'; header[10] = 'V'; header[11] = 'E'; header[12] = 'f'; // 'fmt ' chunk header[13] = 'm'; header[14] = 't'; header[15] = ' '; header[16] = 16; // 4 bytes: size of 'fmt ' chunk header[17] = 0; header[18] = 0; header[19] = 0; header[20] = 1; // format = 1 header[21] = 0; header[22] = (byte) channels; header[23] = 0; header[24] = (byte) (longSampleRate & 0xff); header[25] = (byte) ((longSampleRate >> 8) & 0xff); header[26] = (byte) ((longSampleRate >> 16) & 0xff); header[27] = (byte) ((longSampleRate >> 24) & 0xff); header[28] = (byte) (byteRate & 0xff); header[29] = (byte) ((byteRate >> 8) & 0xff); header[30] = (byte) ((byteRate >> 16) & 0xff); header[31] = (byte) ((byteRate >> 24) & 0xff); header[32] = (byte) (2 * 16 / 8); // block align header[33] = 0; header[34] = 16; // bits per sample header[35] = 0; header[36] = 'd'; header[37] = 'a'; header[38] = 't'; header[39] = 'a'; header[40] = (byte) (totalAudioLen & 0xff); header[41] = (byte) ((totalAudioLen >> 8) & 0xff); header[42] = (byte) ((totalAudioLen >> 16) & 0xff); header[43] = (byte) ((totalAudioLen >> 24) & 0xff); out.write(header,