Android AudioRecord示例
我正在devise一个Android应用程序，我需要实现一个AudioRecord类来logging用户的声音。 经过一些研究（没有提供足够的信息）和一些失败的尝试，我想知道是否有人可以帮助我发布一个例子（代码）如何使用AudioRecord捕获高品质的声音。 我真的很感激。 谢谢
在这里，我发布了一些使用AudioRecord API录制良好声音质量的代码示例。
注意：如果你在模拟器中使用，音质不会太好，因为我们使用的是仅在仿真器中支持的采样率8k。 在设备中使用44.1k的采样率以获得更好的质量。
public class Audio_Record extends Activity { 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 Thread recordingThread = null; private boolean isRecording = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); setButtonHandlers(); enableButtons(false); int 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); } int BufferElements2Rec = 1024; // want to play 2048 (2K) since 2 bytes we use only 1024 int BytesPerElement = 2; // 2 bytes in 16bit format private void startRecording() { recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING, BufferElements2Rec * BytesPerElement); recorder.startRecording(); isRecording = true; recordingThread = new Thread(new Runnable() { public void run() { writeAudioDataToFile(); } }, "AudioRecorder Thread"); recordingThread.start(); } //convert short to byte 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; } private void writeAudioDataToFile() { // Write the output audio in byte String filePath = "/sdcard/voice8K16bitmono.pcm"; short sData[] = new short[BufferElements2Rec]; FileOutputStream os = null; try { os = new FileOutputStream(filePath); } catch (FileNotFoundException e) { e.printStackTrace(); } while (isRecording) { // gets the voice output from microphone to byte format recorder.read(sData, 0, BufferElements2Rec); System.out.println("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, BufferElements2Rec * BytesPerElement); } 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; } } private View.OnClickListener btnClick = new View.OnClickListener() { public void onClick(View v) { switch (v.getId()) { case R.id.btnStart: { enableButtons(true); startRecording(); break; } case R.id.btnStop: { enableButtons(false); stopRecording(); break; } } } }; @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { finish(); } return super.onKeyDown(keyCode, event); } } 欲了解更多详情，请试试这个AUDIORECORD博客 。
快乐编码！
这是一个端到端解决scheme，我实现了将Android麦克风audiostream式传输到服务器进行播放： Android AudioRecord到Server over UDP播放问题
