MediaRecorder以1秒的延遲開始。我如何擺脫沉默？

我想在服務中使用MediaRecorder來錄製聲音。但它在開始時會產生1秒延遲（靜音）。如何擺脫這個？我試過用RehearsalAudioRecorder還是沒有運氣。如果有人在請建議之前解決了這個問題。MediaRecorder以1秒的延遲開始。我如何擺脫沉默？

開始

Intent serviceIntent = new Intent(); 
      serviceIntent.setAction("com.soundrecoder.RecorderService"); 
      serviceIntent.putExtra("audioFile", path); 
      serviceIntent.putExtra("state", true); 
      startService(serviceIntent);

停止

Intent serviceIntent = new Intent(); 
      serviceIntent.setAction("com.soundrecoder.RecorderService"); 
      serviceIntent.putExtra("state", false); 
      startService(serviceIntent);

RecorderService.java文件

public class RecorderService extends Service 
{ 
    private static final String TAG = null; 
    private static MediaRecorder mRecorder; 

    public void onCreate() {}; 

    public void onStart(Intent intent, int startId) 
    { 
     boolean isStart = intent.getBooleanExtra("state", false); 

     if (isStart) { 
      mRecorder = new MediaRecorder(); 
      mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
      mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
      mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
      mRecorder.setOutputFile(intent.getStringExtra("audioFile")); 

      try { 
       mRecorder.prepare(); 
      } catch (IllegalStateException e) { 
       Log.e(TAG,e.getMessage()); 
      } catch (IOException e) { 
       Log.e(TAG,e.getMessage()); 
      } 
      try { 
       mRecorder.start(); 
      } 
      catch (IllegalStateException e) { 
       Log.e(TAG, e.getMessage()); 
      } 
     } 

     else if (!isStart) { 
      mRecorder.stop(); 
      mRecorder.reset(); 
     } 
    } 

    @Override 
    public IBinder onBind(Intent intent) { 
     return null; 
    } 
}

來源

2011-10-04 kakopappa

我發現與RehearsalAudioRecorder

public void onStart(Intent intent, int startId) { 
     boolean isStart = intent.getBooleanExtra("state", false); 

     if (isStart) { 

      acquireWakeLock(); 

      int i = 0; 

      do { 
       if (mRecorder != null) 
        mRecorder.release(); 

       mRecorder = new RehearsalAudioRecorder(false, 0, 0, 0, 0); 

      } while ((++i < 44100) 
        & !(mRecorder.getState() == RehearsalAudioRecorder.State.INITIALIZING)); 

      mRecorder.setOutputFile(intent.getStringExtra("audioFile")); 
      mRecorder.prepare(); 
      mRecorder.start(); 

     } else if (!isStart) { 

      if(mRecorder != null) { 
       mRecorder.stop(); 
       mRecorder.release(); 
       mRecorder = null; 
      } 

      releaseWakeLock(); 

     } 
    }

的解決方案3210

來源

2011-10-05 04:16:18 kakopappa

MediaRecorder以1秒的延遲開始。我如何擺脫沉默？

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