AudioRecorder 录音及播放，音量的获取。
池恩
AudioUtil 工具类：
public class AudioUtil{
/**
* 构造时候需要的Activity，主要用于获取文件夹的路径
*/
private Activity activity;
/**
* 文件代号
*/
public static final int RAW = 0X00000001;
public static final int MP3 = 0X00000002;
/**
* 文件路径
*/
private String rawPath = null;
private String mp3Path = null;
/**
* 采样频率 8000
*/
private static final int SAMPLE_RATE = 8000;
/**
* 录音需要的一些变量
*/
private short[] mBuffer;
/**
* 录音状态
*/
private boolean isRecording = false;
/**
* 是否转换ok
*/
private boolean convertOk = false;
/**
* 錄音類
*/
private AudioRecord mRecorder;
// 录音文件播放
private MediaPlayer mediaPlayer;
private double mEMA = 0.0;
static final private double EMA_FILTER = 0.6;
//AudioRecorder的字符
private int mRecorder_BufferSize;
// private RecordThread recordThread;
private ThreadCallBack callBack;
public ThreadCallBack getCallBack() {
return callBack;
}
public void setCallBack(ThreadCallBack callBack) {
this.callBack = callBack;
}
/**
* 构造方法
*
* @param activity
*/
public AudioUtil(Activity activity) {
this.activity = activity;
}
/**
* 开始录音
* @param rawPath 絕對且完整文件路徑
* @param mp3Path 絕對且完整絕對路徑
*/
public boolean startRecording(String rawPath, String mp3Path) {
// 如果正在录音，则返回
if (isRecording) {
return isRecording;
}
this.rawPath = rawPath;
this.mp3Path = mp3Path;
// 初始化
if (mRecorder == null) {
initRecorder();
}
//產生文件
createFilePath(rawPath,mp3Path);
mRecorder.startRecording();
// recordThread = new RecordThread(mRecorder,mRecorder_BufferSize);
// recordThread = new RecordThread();
// recordThread.setCallBack(this);
// recordThread.start();
//開始錄音
startBufferedWrite(new File(rawPath));
isRecording = true;
return isRecording;
}
/**
* 停止录音，并且转换文件,<br/>
* <b>这很可能是个耗时操作，建议在后台中做
*
* @return
*/
public boolean stopRecordingAndConvertFile() {
if (!isRecording) {
return isRecording;
}
if(mRecorder != null){
// recordThread.setRun(false);
// 停止
mRecorder.stop();
mRecorder.release();
isRecording = false;
// 开始转换
FLameUtils lameUtils = new FLameUtils(1, SAMPLE_RATE, 96);
convertOk = lameUtils.raw2mp3(rawPath, mp3Path);
mRecorder = null;
// File file = new File(mp3Path);
// Log.v("123", "AudioUtil stopRecordin轉換="+convertOk+" amrPath="+rawPath +" length="+file.length());
// amrPath=/storage/emulated/0/Android/data/com.mit.anxin.activity/recorder/AX20141023141409.amr length=1728
//mp3Path=/storage/emulated/0/Android/data/com.mit.anxin.activity/recorder/AX20141023135126.mp3 length=37440 4秒
}
return isRecording ^ convertOk;// convertOk==true,return true
}
/**
* 初始化
*/
private void initRecorder() {
// int bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE,
// AudioFormat.CHANNEL_IN_MONO,
// AudioFormat.ENCODING_PCM_16BIT);
mRecorder_BufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE,
AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT);
mBuffer = new short[mRecorder_BufferSize];
mRecorder = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLE_RATE,
AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT,
mRecorder_BufferSize);
}
/**
* 设置路径，第一个为raw文件，第二个为mp3文件
*
* @return
*/
private void createFilePath(String rawpath,String mp3Path) {
try{
File raw = new File(rawpath);
raw.createNewFile();
File mp3 = new File(mp3Path);
mp3.createNewFile();
// Log.d("AudioUtil", "rawPath = "+rawPath);
// Log.d("AudioUtil", "mp3Path = "+mp3Path);
runCommand("chmod 777 " + rawPath);
runCommand("chmod 777 " + mp3Path);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 执行cmd命令，并等待结果
*
* @param command
* 命令
* @return 是否成功执行
*/
private boolean runCommand(String command) {
boolean ret = false;
Process process = null;
try {
process = Runtime.getRuntime().exec(command);
process.waitFor();
ret = true;
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
process.destroy();
} catch (Exception e) {
e.printStackTrace();
}
}
return ret;
}
/**
* 写入到raw文件
*
* @param file
*/
private void startBufferedWrite(final File file) {
new Thread(new Runnable() {
@Override
public void run() {
DataOutputStream output = null;
try {
output = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
long time1 = System.currentTimeMillis();
while (isRecording) {
int readSize = mRecorder.read(mBuffer, 0, mBuffer.length);
int v = 0;
for (int i = 0; i < readSize; i++) {
output.writeShort(mBuffer[i]);
// output.write(mBuffer[i]);
v += mBuffer[i]*mBuffer[i];
}
long time2 = System.currentTimeMillis();
if (time2-time1 >100) {
if (!String.valueOf(v / (float) readSize).equals("NaN")) {
// float f = Math.abs((v / (float) readSize));
float f = (int) (Math.abs((int)(v /(float)readSize)/10000) >> 1);
if (null == callBack) {
return;
}
if (f<=40) {
// Log.i("123456","音量 >> 1");
callBack.onCurrentVoice(1);
}else if (f<=80&&f>40) {
// Log.i("123456", "音量 >> 2");
callBack.onCurrentVoice(2);
}else if (f<=120&&f>80) {
// Log.i("123456", "音量 >> 3");
callBack.onCurrentVoice(3);
}else if (f<=160&&f>120) {
// Log.i("123456", "音量 >> 4");
callBack.onCurrentVoice(4);
}else if (f<=200&&f>160) {
// Log.i("123456", "音量 >> 5");
callBack.onCurrentVoice(5);
}else if (f<=240&&f>200) {
// Log.i("123456", "音量 >> 6");
callBack.onCurrentVoice(6);
}else if (f>240) {
// Log.i("123456", "音量 >> 7");
callBack.onCurrentVoice(7);
}
}
time1 = time2;
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (output != null) {
try {
output.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
}).start();
}
/**
* 清理文件
*
* @param cleanFlag
* RAW,MP3 or RAW|MP3
*/
public void cleanFile(int cleanFlag) {
File f = null;
try {
switch (cleanFlag) {
case MP3:
f = new File(mp3Path);
if (f.exists())
f.delete();
break;
case RAW:
f = new File(rawPath);
if (f.exists())
f.delete();
break;
case RAW | MP3:
f = new File(rawPath);
if (f.exists())
f.delete();
f = new File(mp3Path);
if (f.exists())
f.delete();
break;
}
f = null;
} catch (Exception e) {
e.printStackTrace();
}
}
//开始播放 synchronized
public void startPlay(String path){
Log.i("startPlay", path);
mediaPlayer = new MediaPlayer();
try {
mediaPlayer.reset();//設置為初始狀態
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
mediaPlayer.setDataSource(path);
mediaPlayer.prepare();
mediaPlayer.start();
/*mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
{
@Override
public void onCompletion(MediaPlayer mPlayer) {
mPlayer.release();
mediaPlayer = null;
}
});*/
mediaPlayer.setOnErrorListener(new android.media.MediaPlayer.OnErrorListener() {
@Override
public boolean onError(MediaPlayer arg0, int arg1, int arg2) {
mediaPlayer.release();//当调用了release()方法后，它就处于End状态
mediaPlayer = null;
return false;
}
});
}catch (Exception e) {
e.printStackTrace();
}
}
//停止播放
public void stopPlay(){
if(mediaPlayer != null){
if(mediaPlayer.isPlaying()){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
}
}
// public double getAmplitude() {
// if (mRecorder != null){
// Log.v("123456", "mediaRecorder.getMaxAmplitude()="+mediaRecorder.getMaxAmplitude()+" "+(mediaRecorder.getMaxAmplitude() / 2700.0));
// return (mediaRecorder.getMaxAmplitude() / 2700.0);
// }
// else
// return 0;
// }
//
// public double getAmplitudeEMA() {
// double amp = getAmplitude();
// mEMA = EMA_FILTER * amp + (1.0 - EMA_FILTER) * mEMA;
// return mEMA;
// }
//
//退出
public void destory(){
if(mediaPlayer != null){
if(mediaPlayer.isPlaying()){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
}
if(mRecorder != null){
mRecorder.release();
mRecorder = null;
}
}
public AudioRecord getmRecorder() {
return mRecorder;
}
public void setmRecorder(AudioRecord mRecorder) {
this.mRecorder = mRecorder;
}
public MediaPlayer getMediaPlayer() {
return mediaPlayer;
}
public void setMediaPlayer(MediaPlayer mediaPlayer) {
this.mediaPlayer = mediaPlayer;
}
public int getmRecorder_BufferSize() {
return mRecorder_BufferSize;
}
public void setmRecorder_BufferSize(int mRecorder_BufferSize) {
this.mRecorder_BufferSize = mRecorder_BufferSize;
}
}
ThreadCallBack callBack 这是获取音量的接口，只要类里继承这个接口，就能及时获取变化的音量。
@Override
public void onCurrentVoice(int currentVolume) {
// Log.v("currentVoice", currentVolume+"");
Message msgMessage = mHandler.obtainMessage();
msgMessage.what = Update_Recorder_Volume;
msgMessage.arg1 = currentVolume;
mHandler.sendMessage(msgMessage);
volumeView.setImageResource(reflectImage(currentVolume));
}
private int reflectImage(int image){
Class<drawable> drawable = R.drawable.class;
Field field = null;
try {
field = drawable.getField("amp"+image);
int r_id = field.getInt(field.getName());
return r_id;
} catch (Exception e) {
Log.e("ERROR", "PICTURE NOT FOUND！");
return R.drawable.amp1;
}
}
public interface ThreadCallBack {
public void onCurrentVoice(int currentVolume);
}
类似资料：