android 录制短音频

getAMRFilePath获取文件路径，只会保留最后一次的录音文件，每次开始录制时都会删除上一次的录音文件。

public class AudioRecorderr {
private boolean isRecord = false;
private int maxDuration = 60 * 1000;//最长录制时间
private int maxSize = 5 * 1024 * 1024;//最大录音大小限制为5M
private MediaRecorder mMediaRecorder;

private Context mContext;
private final String AUDIO_AMR_FILENAME = "temp.amr";

private AudioRecorderr(Context context) {
mContext = context;
}

private static AudioRecorderr mInstance;

/**
* 获取实例
* @param context
* @return
*/
public synchronized static AudioRecorderr getInstance(Context context) {
if (mInstance == null)
mInstance = new AudioRecorderr(context);
return mInstance;
}

/**
*  开始录制
*/
public void startRecord() {
if (!isRecord) {
isRecord = true;
if (mMediaRecorder == null)
createMediaRecord();
try {
mMediaRecorder.prepare();
mMediaRecorder.start();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}

/**
* 结束录制
*/
public void stopRecord() {
close();
}

/**
* 获取录音文件的大小,单位为KB
*/
public double getRecordSize() {
File mFile = new File(getAMRFilePath());
if (!mFile.exists())
return -1;
return mFile.length() / 1024;
}

private void createMediaRecord() {
mMediaRecorder = new MediaRecorder();
/*
* 设置音频来源为麦克风
*/
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

/*
* 设置最长录制时间
*/
mMediaRecorder.setMaxDuration(maxDuration);

/*
* 设置最大录音文件大小
*/
mMediaRecorder.setMaxFileSize(maxSize);

/* 设置输出文件的格式：THREE_GPP/MPEG-4/RAW_AMR/Default
* THREE_GPP(3gp格式，H263视频/ARM音频编码)、MPEG-4、RAW_AMR(只支持音频且音频编码要求为AMR_NB)
*/
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);

/* 设置音频文件的编码：AAC/AMR_NB/AMR_MB/Default */
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
/* 设置输出文件的路径 */
File file = new File(getAMRFilePath());
if (file.exists()) {
file.delete();
}
mMediaRecorder.setOutputFile(getAMRFilePath());
}

private void close() {
if (mMediaRecorder != null) {
isRecord = false;
mMediaRecorder.stop();
mMediaRecorder.release();
mMediaRecorder = null;
}
}

/**
* 获取AMR格式音频文件地址
* @return
*/
public String getAMRFilePath() {
return mContext.getExternalCacheDir().getAbsolutePath() + "/" + AUDIO_AMR_FILENAME;
}

}