主要使用到LAME 这个东东,需要用到jni;要装NDK ,要编译so库文件.要这个那个.. 麻烦的很....

果断各种google,然后找到个别人编译好的so和jar包,爽歪歪;

用非很简单:

FLameUtils mFLameUtils = new FLameUtils(1, sampleRateInHz, 96);

mFLameUtils.raw2mp3(lovaPath, path);

调他封装好的 工具类FLameUtils,然后传入对应的参数,相信用过AudioRecord 的都看得懂参数都是什么;这里说几个注意事项:

1.录音时, 读取数据记得用short[]类型,不然格式转换后会是噪音,short[] buffDate = new short[minBufferSizeInBytes];

2.导入工具类时记得要和他原来的包名一样,不然会调用不到本地jni方法;

3.格式转换记得丢在线程里,不然..你懂得;

4.格式转换完成后记得删掉原数据(raw原数据比较大,我记得录了12秒就1M 了... 我用的44100码率);

下面是我用的录音和格式转换代码:

/**

* 开始录音

*/

public void startRecord() {

if (mAudioRecord != null && !isRecording()) {

if (mAudioRecord.getState() == AudioRecord.STATE_INITIALIZED) {

LogUtil.i(TAG, "开始录音...");

new StartRecordThread().start();

isRecording = true;

} else {

LogUtil.e(TAG, "mAudioRecord=STATE_UNINITIALIZED");

}

}

}

/**

*

**************************************************************************

* @Version

* @ClassName: AudioRecordHelper.StartRecordThread

* @Description: 录音线程

* @Author fans

***************************************************************************

*/

class StartRecordThread extends Thread {

@Override

public void run() {

// TODO Auto-generated method stub

super.run();

mAudioRecord.startRecording();

writeDateToFile(lovaPath);

}

}

/**

* 写入原数据

*

* @param path

*/

private void writeDateToFile(String path) {

short[] buffDate = new short[minBufferSizeInBytes];

DataOutputStream dos = null;

int readSize = 0;

try {

File recordFile = new File(path);

if (recordFile.exists()) {

recordFile.delete();

recordFile.createNewFile();

}

dos = new DataOutputStream(new BufferedOutputStream(

new FileOutputStream(recordFile)));

while (isRecording()) {

readSize = mAudioRecord.read(buffDate, 0, minBufferSizeInBytes);

for (int i = 0; i < readSize; i++) {

dos.writeShort(buffDate[i]);

}

LogUtil.i(TAG, "录入音频大小:" + buffDate.length);

}

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

if (dos != null) {

try {

dos.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

/**

*

**************************************************************************

* @Version

* @ClassName: AudioRecordHelper.Raw2Mp3Thread

* @Description: 原数据转MP3

* @Author fans

***************************************************************************

*/

class Raw2Mp3Thread extends Thread {

String path;

public Raw2Mp3Thread(String path) {

this.path = path;

}

@Override

public void run() {

// TODO Auto-generated method stub

super.run();

String drPath = path.substring(0, path.lastIndexOf("/"));

LogUtil.i(TAG, "储存目录:" + drPath);

File file = new File(drPath);

if (!file.exists()) {

file.mkdirs();

}

LogUtil.i(TAG, "录音原始数据:" + lovaPath + ";MP3数据:" + path);

/* 原始raw文件转换成MP3 */

if (new File(lovaPath).length() < 1) {

LogUtil.e(TAG, "原始数据大小为0");

return;

}

File loveFile = new File(lovaPath);

LogUtil.i(TAG, "MP3格式转换开始...;文件大小=" + loveFile.length());

FLameUtils mFLameUtils = new FLameUtils(1, sampleRateInHz, 96);

mFLameUtils.raw2mp3(lovaPath, path);

LogUtil.i(TAG,

"转换完成:" + path + ";MP3文件大小=" + new File(path).length());

loveFile.delete();

CJApplication.getInstance().sendBroadcast(

new Intent(CJConstant.RECORD_FINISH_ACTION));

}

}

工具类和库文件下载地址:下载地址