Android录制mp3格式文件

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LAME_LIBMP3_DIR := lame-3.98.4_libmp3lameLOCAL_MODULE  := mp3lameLOCAL_SRC_FILES := $(LAME_LIBMP3_DIR)/bitstream.c $(LAME_LIBMP3_DIR)/fft.c $(LAME_LIBMP3_DIR)/id3tag.c $(LAME_LIBMP3_DIR)/mpglib_interface.c $(LAME_LIBMP3_DIR)/presets.c $(LAME_LIBMP3_DIR)/quantize.c $(LAME_LIBMP3_DIR)/reservoir.c $(LAME_LIBMP3_DIR)/tables.c $(LAME_LIBMP3_DIR)/util.c $(LAME_LIBMP3_DIR)/VbrTag.c $(LAME_LIBMP3_DIR)/encoder.c $(LAME_LIBMP3_DIR)/gain_analysis.c $(LAME_LIBMP3_DIR)/lame.c $(LAME_LIBMP3_DIR)/newmdct.c $(LAME_LIBMP3_DIR)/psymodel.c $(LAME_LIBMP3_DIR)/quantize_pvt.c $(LAME_LIBMP3_DIR)/set_get.c $(LAME_LIBMP3_DIR)/takehiro.c $(LAME_LIBMP3_DIR)/vbrquantize.c $(LAME_LIBMP3_DIR)/version.c com_maxi_mp3record_MP3Recorder.cinclude $(BUILD_SHARED_LIBRARY)

package cn.ctvonline.android.modules.project.widget;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import android.media.AudioFormat;import android.media.AudioRecord;import android.media.MediaRecorder;import android.os.Handler;/** * <b>类功能描述：</b><div style="margin-left:40px;margin-top:-10px"> * MP3实时录制功能,可暂停,注意因踩用Native开发,不能混淆 */public class MP3Recorder { private String filePath; private int sampleRate; private boolean isRecording = false; private boolean isPause = false; private Handler handler; /**  * 开始录音  */ public static final int MSG_REC_STARTED = 1; /**  * 结束录音  */ public static final int MSG_REC_STOPPED = 2; /**  * 暂停录音  */ public static final int MSG_REC_PAUSE = 3; /**  * 继续录音  */ public static final int MSG_REC_RESTORE = 4; /**  * 缓冲区挂了,采样率手机不支持  */ public static final int MSG_ERROR_GET_MIN_BUFFERSIZE = -1; /**  * 创建文件时扑街了  */ public static final int MSG_ERROR_CREATE_FILE = -2; /**  * 初始化录音器时扑街了  */ public static final int MSG_ERROR_REC_START = -3; /**  * 录紧音的时候出错  */ public static final int MSG_ERROR_AUDIO_RECORD = -4; /**  * 编码时挂了  */ public static final int MSG_ERROR_AUDIO_ENCODE = -5; /**  * 写文件时挂了  */ public static final int MSG_ERROR_WRITE_FILE = -6; /**  * 没法关闭文件流  */ public static final int MSG_ERROR_CLOSE_FILE = -7; public MP3Recorder(int sampleRate) {  this.sampleRate = sampleRate; } public void setFilePath(String filePath) {  this.filePath = filePath; } /**  * 开片  */ public void start() {  if (isRecording) {   return;  }  new Thread() {   @Override   public void run() {    android.os.Process      .setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);    // 根据定义好的几个配置，来获取合适的缓冲大小    final int minBufferSize = AudioRecord.getMinBufferSize(      sampleRate, AudioFormat.CHANNEL_IN_MONO,      AudioFormat.ENCODING_PCM_16BIT);    if (minBufferSize < 0) {     if (handler != null) {      handler.sendEmptyMessage(MSG_ERROR_GET_MIN_BUFFERSIZE);     }     return;    }    AudioRecord audioRecord = new AudioRecord(      MediaRecorder.AudioSource.MIC, sampleRate,      AudioFormat.CHANNEL_IN_MONO,      AudioFormat.ENCODING_PCM_16BIT, minBufferSize * 2);    // 5秒的缓冲    short[] buffer = new short[sampleRate * (16 / 8) * 1 * 5];    byte[] mp3buffer = new byte[(int) (7200 + buffer.length * 2 * 1.25)];    FileOutputStream output = null;    try {     File file = createSDFile(filePath);     output = new FileOutputStream(file);    } catch (FileNotFoundException e) {     if (handler != null) {      handler.sendEmptyMessage(MSG_ERROR_CREATE_FILE);     }     return;    } catch (IOException e) {     // TODO Auto-generated catch block     e.printStackTrace();    }    MP3Recorder.init(sampleRate, 1, sampleRate, 32);    isRecording = true; // 录音状态    isPause = false; // 录音状态    try {     try {      audioRecord.startRecording(); // 开启录音获取音频数据      if (mListener != null) {       mListener.wellPrepared();      }     } catch (IllegalStateException e) {      // 不给录音...      if (handler != null) {       handler.sendEmptyMessage(MSG_ERROR_REC_START);      }      return;     }     try {      // 开始录音      if (handler != null) {       handler.sendEmptyMessage(MSG_REC_STARTED);      }      int readSize = 0;      boolean pause = false;      while (isRecording) {       /*--暂停--*/       if (isPause) {        if (!pause) {         handler.sendEmptyMessage(MSG_REC_PAUSE);         pause = true;        }        continue;       }       if (pause) {        handler.sendEmptyMessage(MSG_REC_RESTORE);        pause = false;       }       /*--End--*/       /*--实时录音写数据--*/       readSize = audioRecord.read(buffer, 0,         minBufferSize);       voiceLevel = getVoiceSize(readSize, buffer);       if (readSize < 0) {        if (handler != null) {         handler.sendEmptyMessage(MSG_ERROR_AUDIO_RECORD);        }        break;       } else if (readSize == 0) {        ;       } else {        int encResult = MP3Recorder.encode(buffer,          buffer, readSize, mp3buffer);        if (encResult < 0) {         if (handler != null) {          handler.sendEmptyMessage(MSG_ERROR_AUDIO_ENCODE);         }         break;        }        if (encResult != 0) {         try {          output.write(mp3buffer, 0, encResult);         } catch (IOException e) {          if (handler != null) {           handler.sendEmptyMessage(MSG_ERROR_WRITE_FILE);          }          break;         }        }       }       /*--End--*/      }      /*--录音完--*/      int flushResult = MP3Recorder.flush(mp3buffer);      if (flushResult < 0) {       if (handler != null) {        handler.sendEmptyMessage(MSG_ERROR_AUDIO_ENCODE);       }      }      if (flushResult != 0) {       try {        output.write(mp3buffer, 0, flushResult);       } catch (IOException e) {        if (handler != null) {         handler.sendEmptyMessage(MSG_ERROR_WRITE_FILE);        }       }      }      try {       output.close();      } catch (IOException e) {       if (handler != null) {        handler.sendEmptyMessage(MSG_ERROR_CLOSE_FILE);       }      }      /*--End--*/     } finally {      audioRecord.stop();      audioRecord.release();     }    } finally {     MP3Recorder.close();     isRecording = false;    }    if (handler != null) {     handler.sendEmptyMessage(MSG_REC_STOPPED);    }   }  }.start(); } public void stop() {  isRecording = false; } public void pause() {  isPause = true; } public void restore() {  isPause = false; } public boolean isRecording() {  return isRecording; } public boolean isPaus() {  if (!isRecording) {   return false;  }  return isPause; } // 获得声音的level public int getVoiceSize(int r, short[] buffer) {  if (isRecording) {   try {    long v = 0;    // 将 buffer 内容取出，进行平方和运算    for (int i = 0; i < buffer.length; i++) {     v += buffer[i] * buffer[i];    }    // 平方和除以数据总长度，得到音量大小。    double mean = v / (double) r;    double volume = 10 * Math.log10(mean);    return (((int) volume / 10) - 1);   } catch (Exception e) {    // TODO Auto-generated catch block   }  }  return 1; } /**  * 在SD卡上创建文件  *   * @throws IOException  */ public static File createSDFile(String fileName) throws IOException {  File file = new File(fileName);  if (!isFileExists(file))   if (file.isDirectory()) {    file.mkdirs();   } else {    file.createNewFile();   }  return file; } private int voiceLevel; public int getVoiceLevel() {  return voiceLevel; } public interface AudioStageListener {  void wellPrepared(); } public AudioStageListener mListener; public void setOnAudioStageListener(AudioStageListener listener) {  mListener = listener; } /**  * 录音状态管理  *   * @see RecMicToMp3#MSG_REC_STARTED  * @see RecMicToMp3#MSG_REC_STOPPED  * @see RecMicToMp3#MSG_REC_PAUSE  * @see RecMicToMp3#MSG_REC_RESTORE  * @see RecMicToMp3#MSG_ERROR_GET_MIN_BUFFERSIZE  * @see RecMicToMp3#MSG_ERROR_CREATE_FILE  * @see RecMicToMp3#MSG_ERROR_REC_START  * @see RecMicToMp3#MSG_ERROR_AUDIO_RECORD  * @see RecMicToMp3#MSG_ERROR_AUDIO_ENCODE  * @see RecMicToMp3#MSG_ERROR_WRITE_FILE  * @see RecMicToMp3#MSG_ERROR_CLOSE_FILE  */ public void setHandle(Handler handler) {  this.handler = handler; } /*--以下为Native部分--*/ static {  System.loadLibrary("mp3lame"); } /**  * 初始化录制参数  */ public static void init(int inSamplerate, int outChannel,   int outSamplerate, int outBitrate) {  init(inSamplerate, outChannel, outSamplerate, outBitrate, 7); } /**  * 初始化录制参数 quality:0=很好很慢 9=很差很快  */ public native static void init(int inSamplerate, int outChannel,   int outSamplerate, int outBitrate, int quality); /**  * 音频数据编码(PCM左进,PCM右进,MP3输出)  */ public native static int encode(short[] buffer_l, short[] buffer_r,   int samples, byte[] mp3buf); /**  * 据说录完之后要刷干净缓冲区  */ public native static int flush(byte[] mp3buf); /**  * 结束编码  */ public native static void close();}

#include "lame-3.98.4_libmp3lame/lame.h"#include "com_maxi_mp3record_MP3Recorder.h"static lame_global_flags *glf = NULL;JNIEXPORT void JNICALL Java_com_maxi_mp3record_MP3Recorder_init(  JNIEnv *env, jclass cls, jint inSamplerate, jint outChannel,  jint outSamplerate, jint outBitrate, jint quality) { if (glf != NULL) {  lame_close(glf);  glf = NULL; } glf = lame_init(); lame_set_in_samplerate(glf, inSamplerate); lame_set_num_channels(glf, outChannel); lame_set_out_samplerate(glf, outSamplerate); lame_set_brate(glf, outBitrate); lame_set_quality(glf, quality); lame_init_params(glf);}JNIEXPORT jint JNICALL Java_com_maxi_mp3record_MP3Recorder_encode(  JNIEnv *env, jclass cls, jshortArray buffer_l, jshortArray buffer_r,  jint samples, jbyteArray mp3buf) { jshort* j_buffer_l = (*env)->GetShortArrayElements(env, buffer_l, NULL); jshort* j_buffer_r = (*env)->GetShortArrayElements(env, buffer_r, NULL); const jsize mp3buf_size = (*env)->GetArrayLength(env, mp3buf); jbyte* j_mp3buf = (*env)->GetByteArrayElements(env, mp3buf, NULL); int result = lame_encode_buffer(glf, j_buffer_l, j_buffer_r,   samples, j_mp3buf, mp3buf_size); (*env)->ReleaseShortArrayElements(env, buffer_l, j_buffer_l, 0); (*env)->ReleaseShortArrayElements(env, buffer_r, j_buffer_r, 0); (*env)->ReleaseByteArrayElements(env, mp3buf, j_mp3buf, 0); return result;}JNIEXPORT jint JNICALL Java_com_maxi_mp3record_MP3Recorder_flush(  JNIEnv *env, jclass cls, jbyteArray mp3buf) { const jsize mp3buf_size = (*env)->GetArrayLength(env, mp3buf); jbyte* j_mp3buf = (*env)->GetByteArrayElements(env, mp3buf, NULL); int result = lame_encode_flush(glf, j_mp3buf, mp3buf_size); (*env)->ReleaseByteArrayElements(env, mp3buf, j_mp3buf, 0); return result;}JNIEXPORT void JNICALL Java_com_maxi_mp3record_MP3Recorder_close(  JNIEnv *env, jclass cls) { lame_close(glf); glf = NULL;}

/* DO NOT EDIT THIS FILE - it is machine generated */#include <jni.h>/* Header for class com_maxi_mp3record_MP3Recorder */#ifndef _Included_com_maxi_mp3record_MP3Recorder#define _Included_com_maxi_mp3record_MP3Recorder#ifdef __cplusplusextern "C" {#endif/* * Class:  com_maxi_mp3record_MP3Recorder * Method: init * Signature: (IIIII)V */JNIEXPORT void JNICALL Java_com_maxi_mp3record_MP3Recorder_init (JNIEnv *, jclass, jint, jint, jint, jint, jint);/* * Class:  com_maxi_mp3record_MP3Recorder * Method: encode * Signature: ([S[SI[B)I */JNIEXPORT jint JNICALL Java_com_maxi_mp3record_MP3Recorder_encode (JNIEnv *, jclass, jshortArray, jshortArray, jint, jbyteArray);/* * Class:  com_maxi_mp3record_MP3Recorder * Method: flush * Signature: ([B)I */JNIEXPORT jint JNICALL Java_com_maxi_mp3record_MP3Recorder_flush (JNIEnv *, jclass, jbyteArray);/* * Class:  com_maxi_mp3record_MP3Recorder * Method: close * Signature: ()V */JNIEXPORT void JNICALL Java_com_maxi_mp3record_MP3Recorder_close (JNIEnv *, jclass);#ifdef __cplusplus}#endif#endif

MP3Recorder recorder = new MP3Recorder(8000);recorder.setFilePath(voicePath);//录音保存目录recorder.start();//开始录音recorder.stop();//录音结束recorder.getVoiceLevel()//这是我封装的获取音频振幅接口，大家可以用来录音的时候显示声音大小，数据自行调节。