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我试图将音频&存储到SD卡以及发送到服务器。当我试图播放录制的声音时，但并非如我所记录的那样。如果我录制10分钟的声音，它将播放4分钟，即有人按下快速前进按钮并发出一些嘈杂的声音。我不明白我出错的地方。有人可以告诉我如何解决这个问题（我应该播放多少记录，即记录10分钟，然后应该只播放10分钟）。Android：使用audiorecord类录制音频播放为快速转发
这里是代码..张贴散装代码抱歉..
public class Audio_Call extends Activity {
private static final int RECORDER_BPP = 16;
private static final String AUDIO_RECORDER_FILE_EXT_WAV = "AudioRecorder.wav";
private static final String AUDIO_RECORDER_FOLDER = "AudioRecorder";
private static final String AUDIO_RECORDER_TEMP_FILE = "record_temp.raw";
private static final int RECORDER_SAMPLERATE = 8000;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private AudioRecord recorder = null;
// private int bufferSize = 200000;
private int bufferSize = 0;
short[] buffer;
private Thread recordingThread = null;
private boolean isRecording = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.audio_call);
setButtonHandlers();
enableButtons(false);
bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,
RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);
}
private void setButtonHandlers() {
((Button) findViewById(R.id.btnStart)).setOnClickListener(btnClick);
((Button) findViewById(R.id.btnStop)).setOnClickListener(btnClick);
}
private void enableButton(int id, boolean isEnable) {
((Button) findViewById(id)).setEnabled(isEnable);
}
private void enableButtons(boolean isRecording) {
enableButton(R.id.btnStart, !isRecording);
enableButton(R.id.btnStop, isRecording);
}
// stores the file into the SDCARD
private String getFilename() {
System.out.println("---3---");
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath, AUDIO_RECORDER_FOLDER);
if (!file.exists()) {
file.mkdirs();
}
return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_FILE_EXT_WAV);
}
// stores the file into the SDCARD
private String getTempFilename() {
// Creates the temp file to store buffer
System.out.println("---4-1--");
String filepath = Environment.getExternalStorageDirectory().getPath();
System.out.println("---4-2--");
File file = new File(filepath, AUDIO_RECORDER_FOLDER);
System.out.println("---4-3--");
if (!file.exists()) {
file.mkdirs();
}
File tempFile = new File(filepath, AUDIO_RECORDER_TEMP_FILE);
System.out.println("---4-4--");
if (tempFile.exists())
tempFile.delete();
System.out.println("---4-5--");
return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_TEMP_FILE);
}
private void startRecording() {
int buffercount = 4088/bufferSize;
if (buffercount < 1)
buffercount = 1;
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
RECORDER_SAMPLERATE, RECORDER_CHANNELS,
RECORDER_AUDIO_ENCODING, bufferSize * buffercount);
buffer = new short[4088];
recorder.startRecording();
isRecording = true;
recordingThread = new Thread(new Runnable() {
@Override
public void run() {
writeAudioDataToFile();
}
}, "AudioRecorder Thread");
recordingThread.start();
}
private void writeAudioDataToFile() {
// Write the output audio in byte
byte data[] = new byte[bufferSize];
String filename = getTempFilename();
//
FileOutputStream os = null;
//
try {
//
os = new FileOutputStream(filename);
//
} catch (FileNotFoundException e) {
e.printStackTrace();
}
int read = 0;
// if (null != os) {
while (isRecording) {
// gets the voice output from microphone to byte format
recorder.read(buffer, 0, buffer.length);
// read = recorder.read(data, 0, 6144);
if (AudioRecord.ERROR_INVALID_OPERATION != read) {
try {
// // writes the data to file from buffer
// // stores the voice buffer
// short[] shorts = new short[bytes.length/2];
// to turn bytes to shorts as either big endian or little
// endian.
// ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shorts);
// to turn shorts back to bytes.
byte[] bytes2 = new byte[buffer.length * 2];
ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN)
.asShortBuffer().put(buffer);
os.write(bytes2);
SendAudio(buffer);
} catch (IOException e) {
e.printStackTrace();
}
}
}
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
// }
private void stopRecording() {
// stops the recording activity
if (null != recorder) {
isRecording = false;
recorder.stop();
recorder.release();
recorder = null;
recordingThread = null;
}
// copy the recorded file to original copy & delete the recorded copy
copyWaveFile(getTempFilename(), getFilename());
deleteTempFile();
}
private void deleteTempFile() {
File file = new File(getTempFilename());
file.delete();
}
private void copyWaveFile(String inFilename, String outFilename) {
System.out.println("---8---");
FileInputStream in = null;
FileOutputStream out = null;
long totalAudioLen = 0;
long totalDataLen = totalAudioLen + 36;
long longSampleRate = RECORDER_SAMPLERATE;
int channels = 2;
long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels/8;
byte[] data = new byte[bufferSize];
try {
in = new FileInputStream(inFilename);
out = new FileOutputStream(outFilename);
totalAudioLen = in.getChannel().size();
totalDataLen = totalAudioLen + 36;
AppLog.logString("File size: " + totalDataLen);
WriteWaveFileHeader(out, totalAudioLen, totalDataLen,
longSampleRate, channels, byteRate);
byte[] bytes2 = new byte[buffer.length * 2];
ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN)
.asShortBuffer().put(buffer);
while (in.read(bytes2) != -1) {
out.write(bytes2);
}
in.close();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen,
long totalDataLen, long longSampleRate, int channels, long byteRate)
throws IOException {
System.out.println("---9---");
byte[] header = new byte[4088];
header[0] = 'R'; // RIFF/WAVE header
header[1] = 'I';
header[2] = 'F';
header[3] = 'F';
header[4] = (byte) (totalDataLen & 0xff);
header[5] = (byte) ((totalDataLen >> 8) & 0xff);
header[6] = (byte) ((totalDataLen >> 16) & 0xff);
header[7] = (byte) ((totalDataLen >> 24) & 0xff);
header[8] = 'W';
header[9] = 'A';
header[10] = 'V';
header[11] = 'E';
header[12] = 'f'; // 'fmt ' chunk
header[13] = 'm';
header[14] = 't';
header[15] = ' ';
header[16] = 16; // 4 bytes: size of 'fmt ' chunk
header[17] = 0;
header[18] = 0;
header[19] = 0;
header[20] = 1; // format = 1
header[21] = 0;
header[22] = (byte) channels;
header[23] = 0;
header[24] = (byte) (longSampleRate & 0xff);
header[25] = (byte) ((longSampleRate >> 8) & 0xff);
header[26] = (byte) ((longSampleRate >> 16) & 0xff);
header[27] = (byte) ((longSampleRate >> 24) & 0xff);
header[28] = (byte) (byteRate & 0xff);
header[29] = (byte) ((byteRate >> 8) & 0xff);
header[30] = (byte) ((byteRate >> 16) & 0xff);
header[31] = (byte) ((byteRate >> 24) & 0xff);
header[32] = (byte) (2 * 16/8); // block align
header[33] = 0;
header[34] = RECORDER_BPP; // bits per sample
header[35] = 0;
header[36] = 'd';
header[37] = 'a';
header[38] = 't';
header[39] = 'a';
header[40] = (byte) (totalAudioLen & 0xff);
header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
header[43] = (byte) ((totalAudioLen >> 24) & 0xff);
out.write(header, 0, 4088);
}
private View.OnClickListener btnClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnStart: {
AppLog.logString("Start Recording");
enableButtons(true);
startRecording();
break;
}
case R.id.btnStop: {
AppLog.logString("Stop Recording");
enableButtons(false);
stopRecording();
break;
}
}
}
};
public void SendAudio(final short data[]) {
Thread thrd = new Thread(new Runnable() {
String LOG_TAG = null;
long SAMPLE_INTERVAL = 10;
@Override
public void run() {
Log.e(LOG_TAG, "start send thread, thread id: ");
long file_size = 0;
int bytes_read = 0;
int bytes_count = 0;
// byte[] buf = new byte[bufferSize];
// buf = data;
try {
// byte [] b = "192.168.1.40".getBytes();
byte[] b = new byte[] { (byte) 192, (byte) 168, (byte) 1,
(byte) 39 };
InetAddress addr = InetAddress.getLocalHost();
InetAddress addr1 = InetAddress.getByAddress(b);
HttpClient httpclient = new DefaultHttpClient();
ServerUrl url = new ServerUrl();
String url_page = ServerUrl.url_audio;
// String value = new String(buf);
// System.out.println("mmdata--------- " + value);
HttpPost httppost = new HttpPost(url_page);
// Unix time stamp
long unixTime = System.currentTimeMillis()/1000L;
String timestamp = String.valueOf(unixTime);
// Json Format
JSONObject holder = new JSONObject();
JSONArray jArray = new JSONArray();
try {
holder.put("UserId", "1");
holder.put("Timestamp", timestamp);
// holder.put("length", value.length());
for (int i = 0; i < buffer.length; i++) {
jArray.put(i, buffer[i]);
}
holder.put("MMData", jArray);
System.out.println("ARRAYYYY" + jArray);
} catch (JSONException e1) {
e1.printStackTrace();
}
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
2);
nameValuePairs.add(new BasicNameValuePair("MMData",
jArray.toString()));
httppost.setEntity(new UrlEncodedFormEntity(
nameValuePairs));
StringEntity se = new StringEntity(jArray.toString());
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,
"application/json"));
httppost.setEntity(se);
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
System.out.println("-------13");
e.printStackTrace();
} catch (IOException e) {
System.out.println("-------14");
e.printStackTrace();
} catch (Exception e) {
System.out.println("-------15");
System.out.println("Exception");
e.printStackTrace();
}
bytes_count += bytes_read;
Log.d(LOG_TAG, "bytes_count : " + bytes_count);
Thread.sleep(SAMPLE_INTERVAL, 0);
} catch (InterruptedException ie) {
Log.e(LOG_TAG, "InterruptedException");
} catch (UnknownHostException uhe) {
Log.e(LOG_TAG, "UnknownHostException");
} catch (IOException ie) {
Log.e(LOG_TAG, "IOException");
}
} // end run
});
thrd.start();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
finish();
}
return super.onKeyDown(keyCode, event);
}
}
帮助将不胜感激。我已经做了这个搜索，但力得到适当的解决方案..我想所有其他的可能性但没有成功。
非常感谢
您能告诉我们如何调用WriteWaveFileHeader吗？即你传递给它的论据的价值是什么？ – Michael 2012-08-08 14:01:27
@Michael我已更新代码.. – 2012-08-09 04:13:20
生成的文件大小与您预期的相同吗？如果您在音频编辑器（如Audacity）中打开原始数据，您应该能够通过尝试不同的导入设置找出采样率/＃频道的真正含义，直到您正确播放它为止。 – Michael 2012-08-09 08:57:44