audiorecorder录制音频，格式为wav
一.变量声明
private AudioRecord audioRecord = null;private static int frequency = 44100;private static int channel = AudioFormat.CHANNEL_IN_STEREO;// 设置声道private static int encodingBitRate = AudioFormat.ENCODING_PCM_16BIT;// 设置编码private static final int recorder_bpp = 16;private int recBufSize = 0;private int playBufSize = 0;private boolean isRecording = false;// 录音标志位private String tempFilePath;// 临时文件的路径private String saveFilePath;// 保存文件的路径private static final String saveFold = "Audio123";// 保存的文件夹名private static final String temp_file = "record_temp.raw";// 零时文件名private Thread recThread = null;//录音线程
tempFilePath = SDCardHelp.getFilePath(saveFold) + "/" + temp_file;String fileName = DateHelp.getFormateDate(3);saveFilePath = SDCardHelp.getFilePath(saveFold) + "/" + fileName+ ".wav";
// 开始录音private void startRec() {recBufSize = AudioRecord.getMinBufferSize(frequency, channel,encodingBitRate);audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, frequency,channel, encodingBitRate, recBufSize);audioRecord.startRecording();isRecording = true;recThread = new Thread(new Runnable() {public void run() {writeAudioDataToFile();}}, "AudioRecorder Thread");recThread.start();}// 将音频数据写入文件private void writeAudioDataToFile() {byte data[] = new byte[recBufSize];FileOutputStream os = null;try {os = new FileOutputStream(tempFilePath);} catch (FileNotFoundException e) {e.printStackTrace();}int read = 0;if (null != os) {while (isRecording) {read = audioRecord.read(data, 0, recBufSize);if (AudioRecord.ERROR_INVALID_OPERATION != read) {try {os.write(data);} catch (IOException e) {e.printStackTrace();}}}try {os.close();} catch (IOException e) {e.printStackTrace();}}}private void stopRecording() {if (null != audioRecord) {isRecording = false;audioRecord.stop();audioRecord.release();audioRecord = null;recThread = null;}String fileName = DateHelp.getFormateDate(3);saveFilePath = SDCardHelp.getFilePath(saveFold) + "/" + fileName+ ".wav";copyWaveFile(tempFilePath, saveFilePath);deleteTempFile();}// 删除临时文件private void deleteTempFile() {File file = new File(tempFilePath);file.delete();}private void copyWaveFile(String inFilename, String outFilename) {FileInputStream in = null;FileOutputStream out = null;long totalAudioLen = 0;long totalDataLen = totalAudioLen + 36;long longSampleRate = frequency;int channels = 2;long byteRate = recorder_bpp * frequency * channels / 8;byte[] data = new byte[recBufSize];try {in = new FileInputStream(inFilename);out = new FileOutputStream(outFilename);totalAudioLen = in.getChannel().size();totalDataLen = totalAudioLen + 36;WriteWaveFileHeader(out, totalAudioLen, totalDataLen,longSampleRate, channels, byteRate);while (in.read(data) != -1) {out.write(data);}in.close();out.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}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 headerheader[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 ' chunkheader[13] = 'm';header[14] = 't';header[15] = ' ';header[16] = 16; // 4 bytes: size of 'fmt ' chunkheader[17] = 0;header[18] = 0;header[19] = 0;header[20] = 1; // format = 1header[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 alignheader[33] = 0;header[34] = recorder_bpp; // bits per sampleheader[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, 0, 44);}