Era*_*ray 12 android audiorecord
我已经阅读了很多关于Android的AudioRecorder的网页.您可以在问题下方看到它们的列表.
我正在尝试使用AudioRecorder录制音频,但效果不佳.
public class MainActivity extends Activity {
AudioRecord ar = null;
int buffsize = 0;
int blockSize = 256;
boolean isRecording = false;
private Thread recordingThread = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void baslat(View v)
{
// when click to START
buffsize = AudioRecord.getMinBufferSize(44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
ar = new AudioRecord(MediaRecorder.AudioSource.MIC, 44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, buffsize);
ar.startRecording();
isRecording = true;
recordingThread = new Thread(new Runnable() {
public void run() {
writeAudioDataToFile();
}
}, "AudioRecorder Thread");
recordingThread.start();
}
public void durdur(View v)
{
// When click to STOP
ar.stop();
isRecording = false;
}
private void writeAudioDataToFile() {
// Write the output audio in byte
String filePath = "/sdcard/voice8K16bitmono.wav";
short sData[] = new short[buffsize/2];
FileOutputStream os = null;
try {
os = new FileOutputStream(filePath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
while (isRecording) {
// gets the voice output from microphone to byte format
ar.read(sData, 0, buffsize/2);
Log.d("eray","Short wirting to file" + sData.toString());
try {
// // writes the data to file from buffer
// // stores the voice buffer
byte bData[] = short2byte(sData);
os.write(bData, 0, buffsize);
} catch (IOException e) {
e.printStackTrace();
}
}
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private byte[] short2byte(short[] sData) {
int shortArrsize = sData.length;
byte[] bytes = new byte[shortArrsize * 2];
for (int i = 0; i < shortArrsize; i++) {
bytes[i * 2] = (byte) (sData[i] & 0x00FF);
bytes[(i * 2) + 1] = (byte) (sData[i] >> 8);
sData[i] = 0;
}
return bytes;
}
它正在创建一个.wav文件但是,当我试着听它时,它没有打开.我收到"文件不支持"错误.我试过用很多媒体播放器应用程序播放该文件.
注意:我必须使用AudioRecorder而不是MediaRecorder,因为我的应用程序将在录制时执行另一个过程(显示均衡器).
以下是我读过的有关此主题的页面列表:
有很多不同的方法可以解决这个问题.我已经尝试过很多但是对我来说没什么用.我一直在研究这个问题大约6个小时,所以我希望得到一个明确的答案,理想情况下是一些示例代码.
小智 14
我写了一个简单的(通过它你应该阅读,而不是专业标准)类昨天这样做,它的工作原理.
private class Wave
{
private final int LONGINT = 4;
private final int SMALLINT = 2;
private final int INTEGER = 4;
private final int ID_STRING_SIZE = 4;
private final int WAV_RIFF_SIZE = LONGINT+ID_STRING_SIZE;
private final int WAV_FMT_SIZE = (4*SMALLINT)+(INTEGER*2)+LONGINT+ID_STRING_SIZE;
private final int WAV_DATA_SIZE = ID_STRING_SIZE+LONGINT;
private final int WAV_HDR_SIZE = WAV_RIFF_SIZE+ID_STRING_SIZE+WAV_FMT_SIZE+WAV_DATA_SIZE;
private final short PCM = 1;
private final int SAMPLE_SIZE = 2;
int cursor, nSamples;
byte[] output;
public Wave(int sampleRate, short nChannels, short[] data, int start, int end)
{
nSamples=end-start+1;
cursor=0;
output=new byte[nSamples*SMALLINT+WAV_HDR_SIZE];
buildHeader(sampleRate,nChannels);
writeData(data,start,end);
}
// ------------------------------------------------------------
private void buildHeader(int sampleRate, short nChannels)
{
write("RIFF");
write(output.length);
write("WAVE");
writeFormat(sampleRate, nChannels);
}
// ------------------------------------------------------------
public void writeFormat(int sampleRate, short nChannels)
{
write("fmt ");
write(WAV_FMT_SIZE-WAV_DATA_SIZE);
write(PCM);
write(nChannels);
write(sampleRate);
write(nChannels * sampleRate * SAMPLE_SIZE);
write((short)(nChannels * SAMPLE_SIZE));
write((short)16);
}
// ------------------------------------------------------------
public void writeData(short[] data, int start, int end)
{
write("data");
write(nSamples*SMALLINT);
for(int i=start; i<=end; write(data[i++]));
}
// ------------------------------------------------------------
private void write(byte b)
{
output[cursor++]=b;
}
// ------------------------------------------------------------
private void write(String id)
{
if(id.length()!=ID_STRING_SIZE) Utils.logError("String "+id+" must have four characters.");
else {
for(int i=0; i<ID_STRING_SIZE; ++i) write((byte)id.charAt(i));
}
}
// ------------------------------------------------------------
private void write(int i)
{
write((byte) (i&0xFF)); i>>=8;
write((byte) (i&0xFF)); i>>=8;
write((byte) (i&0xFF)); i>>=8;
write((byte) (i&0xFF));
}
// ------------------------------------------------------------
private void write(short i)
{
write((byte) (i&0xFF)); i>>=8;
write((byte) (i&0xFF));
}
// ------------------------------------------------------------
public boolean wroteToFile(String filename)
{
boolean ok=false;
try {
File path=new File(getFilesDir(),filename);
FileOutputStream outFile = new FileOutputStream(path);
outFile.write(output);
outFile.close();
ok=true;
} catch (FileNotFoundException e) {
e.printStackTrace();
ok=false;
} catch (IOException e) {
ok=false;
e.printStackTrace();
}
return ok;
}
}
希望这可以帮助
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