Android 录音(录音时为pcm,然后转为MP3)

项目中用的评论回复功能,录制语言时为pcm格式,然后转换为MP3格式:

package zhiji.dajing.com.util;import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;import com.jiangdg.lametomp3.LameMp3;
import com.jiangdg.lametomp3.Mp3Recorder;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.ShortBuffer;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;public class AudioRecoderUtils {//文件路径private String filePath;//文件夹路径private String FolderPath;AudioRecord audioRecord;private final String TAG = "AudioRecoderUtils";public static final int MAX_LENGTH = 1000 * 1000 * 1000 ;// 最大录音时长private OnAudioStatusUpdateListener audioStatusUpdateListener;private  String voicePath = Environment.getExternalStorageDirectory()+"/dajing/audio/pcm/";private String voiceName = TimeUtils.getCurrentTime() + ".pcm";private boolean isRecording = false;int nMinBufSize =AudioRecord.getMinBufferSize(16000,AudioFormat.CHANNEL_IN_MONO,AudioFormat.ENCODING_PCM_16BIT);private double volume;private ExecutorService mThreadExecutor;private Handler handler;static AudioRecoderUtils audioRecoderUtils_p ;public boolean isTmpConversition;/*** 文件存储默认sdcard/record*/public AudioRecoderUtils(){//默认保存路径为/sdcard/record/下this(Environment.getExternalStorageDirectory()+"/dajing/audio/pcm/");mThreadExecutor = Executors.newScheduledThreadPool(3);}public AudioRecoderUtils(String filePath) {File path = new File(filePath);if(!path.exists())path.mkdirs();this.FolderPath = filePath;handler = new Handler();}public static AudioRecoderUtils getInstance(){if (audioRecoderUtils_p == null){audioRecoderUtils_p = new AudioRecoderUtils();}return audioRecoderUtils_p;}private long startTime;private long endTime;public void startRecord(){audioRecord = new AudioRecord(MediaRecorder.AudioSource.VOICE_COMMUNICATION, 16000,AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, nMinBufSize);final File file = new File(voicePath);voiceName = TimeUtils.getCurrentTime() + ".pcm";final File fileaudio = new File(voicePath + voiceName);filePath = voicePath + voiceName;if (fileaudio.exists()) {fileaudio.delete();}if (!file.exists()) {file.mkdirs();}audioRecord.startRecording();isRecording = true;startTime = System.currentTimeMillis();mThreadExecutor.execute(new Runnable() {@Overridepublic void run() {FileOutputStream fos = null;byte data[] = new byte[nMinBufSize];try {fos = new FileOutputStream(fileaudio);} catch (FileNotFoundException e) {e.printStackTrace();}if (null != fos) {while (isRecording) {int read = audioRecord.read(data, 0, nMinBufSize);volume = getVolume(read, data.clone());handler.post(new Runnable() {@Overridepublic void run() {audioStatusUpdateListener.onUpdate(volume,System.currentTimeMillis()-startTime);}});//返回正确时才读取数据if (AudioRecord.ERROR_INVALID_OPERATION != read) {try {fos.write(data);} catch (IOException e) {e.printStackTrace();}}}try {fos.close();} catch (IOException e) {e.printStackTrace();}}}});}private double getVolume(int r, byte[] bytes_pkg) {int v = 0;for(int i = 0; i < bytes_pkg.length; i+=2){int v1 = bytes_pkg[i] & 0xFF;int v2 = bytes_pkg[i + 1] & 0xFF;int temp = v1 + (v2 << 8);// 小端if (temp >= 0x8000) {temp = 0xffff - temp;}v += Math.abs(temp);}int tmp_v = v / bytes_pkg.length / 2;volume = Math.log10(1 + tmp_v) * 10;return volume;}public Long stopRecord() {isRecording = false;if (audioRecord != null) {audioRecord.stop();audioRecord.release();//调用release之后必须置为nullaudioRecord = null;}endTime = System.currentTimeMillis();process();return endTime - startTime;}public static String path;private File mFile;public  String processPath = voicePath + System.currentTimeMillis() + "process.pcm";private Timer timer;private void process() {mThreadExecutor.execute(new Runnable() {@Overridepublic void run() {mFile = new File(filePath);try {FileInputStream ins = new FileInputStream(mFile);byte[] bbytes = new byte[(int) mFile.length()];int readBytes = ins.read(bbytes);ins.close();Log.i(TAG,"读取pcm数据流，大小为："+readBytes);//录音用16K采用，单声道，16位//读取PCM文件到bbytes[]int count = bbytes.length/2;      //16位数组的长度short[] data = new short[count];for (int i = 0; i < count; i++) {data[i] = (short) (bbytes[i * 2] & 0xff | (bbytes[2 * i + 1] & 0xff)<< 8);            //需要确认是否是小端模式}int num = 0;float allNum = 0;for (int i = 0; i < count; i++) {if (data[i] > 1800) {allNum = allNum + data[i];num = num + 1;}}float multiple;if(allNum==0||num==0){multiple=6;}else{if (allNum / num < 2500) {multiple = (float) (32000 / (allNum / num) / 2.5);}else{multiple = (float) (32000 / (allNum / num) / 6.5);}if (multiple < 1) {multiple = 1;}}for (int i = 0; i < count; i++) {if (Math.abs(data[i]) < ((short)32000 / multiple)) {data[i] = (short) (data[i] * multiple);}}for (int i = 0; i < count; i++) {bbytes[i * 2] = (byte) (data[i] >> 0);bbytes[i * 2 + 1] = (byte) (data[i] >> 8);         //需要确认是否是小端模式}byte[] bbytes8000 = new byte[count];int j = 0;for (int i = 0; i < bbytes.length ; i++) {if((i%4) == 0){bbytes8000[j] = bbytes[i];bbytes8000[j+1] = bbytes[i+1];j+=2;}}// 保存bbytes[]到PCM文件try {String finalPath = "";if (isTmpConversition){OutputStream out = new FileOutputStream(processPath);out.write(bbytes8000);out.close();finalPath = AmrEncoder.pcm2Amr(processPath, Environment.getExternalStorageDirectory() +"/dajing/audio/amr/");}else {/** 初始化lame库，配置相关信息* @param inSampleRate pcm格式音频采样率* @param outChannel pcm格式音频通道数量* @param outSampleRate mp3格式音频采样率* @param outBitRate mp3格式音频比特率* @param quality mp3格式音频质量，0~9，最慢最差~最快最好*/LameMp3.lameInit(16000,AudioFormat.CHANNEL_IN_MONO,16000, Mp3Recorder.LAME_BITRATE_32,5);byte[] mp3Bytes = new byte[bbytes.length];int lameFlush = LameMp3.lameEncode(data,data,data.length,mp3Bytes);Log.i(TAG,"lame编码，大小为："+ lameFlush);int flush = LameMp3.lameFlush(mp3Bytes);Log.i(TAG,"录制完毕，大小为：" + flush);OutputStream mp3Out = null;String mp3Path = Environment.getExternalStorageDirectory() + "/dajing/audio/mp3/" + System.currentTimeMillis() + ".mp3";File file = new File(Environment.getExternalStorageDirectory() + "/dajing/audio/mp3/");if (!file.exists()){file.mkdirs();}try {mp3Out = new FileOutputStream(mp3Path);mp3Out.write(mp3Bytes,0,lameFlush );mp3Out.close();finalPath = mp3Path;} catch (Exception e) {e.printStackTrace();}}String finalPath1 = finalPath;handler.post(new Runnable() {@Overridepublic void run() {audioStatusUpdateListener.onStop(finalPath1);}});} catch (Exception e) {e.printStackTrace();}finally {LameMp3.lameClose();}} catch (Exception e) {e.printStackTrace();}}});}private short[] transferByte2Short(byte[] data,int readBytes){// byte[] 转 short[]，数组长度缩减一半int shortLen = readBytes / 2;// 将byte[]数组装如ByteBuffer缓冲区ByteBuffer byteBuffer = ByteBuffer.wrap(data, 0, readBytes);// 将ByteBuffer转成小端并获取shortBufferShortBuffer shortBuffer = byteBuffer.order(ByteOrder.LITTLE_ENDIAN).asShortBuffer();short[] shortData = new short[shortLen];shortBuffer.get(shortData, 0, shortLen);return shortData;}/*** 取消录音*/public void cancelRecord(){isRecording = false;try {audioRecord.stop();audioRecord.release();audioRecord = null;}catch (RuntimeException e){audioRecord.release();}finally {audioRecord = null;}File file = new File(filePath);if (file.exists())file.delete();filePath = "";}public void setOnAudioStatusUpdateListener(OnAudioStatusUpdateListener audioStatusUpdateListener) {this.audioStatusUpdateListener = audioStatusUpdateListener;}/*** 更新麦克状态*/private void updateMicStatus() {if (audioRecord != null) {timer = new Timer();timer.schedule(new TimerTask() {@Overridepublic void run() {try {byte data[] = new byte[nMinBufSize];int read = audioRecord.read(data, 0, nMinBufSize);volume = getVolume(read, data.clone());Log.e("reaudioTime","time 3 = " + volume);double ratio =0.0;if (volume < 1000 && volume > 0){ratio = volume / 600;}else {ratio = volume / 4000;}double db = 0;// 分贝if (ratio > 1) {db = 20 * Math.log10(ratio);if(null != audioStatusUpdateListener) {double finalDb = db;handler.post(new Runnable() {@Overridepublic void run() {}});}}} catch (Exception e) {e.printStackTrace();}}},100,100);}}public interface OnAudioStatusUpdateListener {/*** 录音中...* @param db 当前声音分贝* @param time 录音时长*/public void onUpdate(double db, long time);/*** 停止录音* @param filePath 保存路径*/public void onStop(String filePath);}}

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