Hi,
MediaRecorder can record audio(or video) to disk. and it's method
"setMaxDuration" can limit the recording duration. when the time
reached, the OnInfoListener will callback the "onInfo" method.
but in my practice, the "OnInfo" never be called. can any body give me
some tips? below is the code.
package com.iflytek.testac;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
import android.media.MediaRecorder;
import android.media.MediaRecorder.OnInfoListener;
public class Recorder implements OnInfoListener
{
private MediaRecorder _recorder = null;
private Listener _Listener = null;
private Timer _Timer = null;
public void Start(int maxTime)
{
_recorder = new MediaRecorder();
_recorder.setOnInfoListener(this);
_recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
_recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
_recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
_recorder.setOutputFile("/sdcard/somusic.temp.amr");
_recorder.setMaxDuration(maxTime);
try
{
new File("/sdcard/somusic.temp.amr").createNewFile();
_recorder.prepare();
}
catch (IllegalStateException e)
{
e.printStackTrace();
if (_Listener != null)
{
_Listener.OnError();
}
}
catch (IOException e)
{
e.printStackTrace();
if (_Listener != null)
{
_Listener.OnError();
}
}
_recorder.start();
_Timer = new Timer();
_Timer.scheduleAtFixedRate(new FetchTask(), 1000, 1000);
}
public void onInfo(MediaRecorder mr, int what, int extra)
{
if (what ==
MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED)
{
if (_Listener != null)
{
_Listener.OnFinish();
}
_recorder.stop();
_recorder.reset();
_recorder.release();
_Timer.cancel();
}
}
public void OnTimer()
{
if (_Listener != null)
{
byte[] buffer = new byte[3];
_Listener.OnData(buffer);
}
}
public void SetListener(Listener listener)
{
_Listener = listener;
}
private class FetchTask extends TimerTask
{
public void run()
{
OnTimer();
}
}
public interface Listener
{
void OnError();
void OnData(byte[] buffer);
void OnFinish();
}
}
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