Android: Camera.takePicture callbacks don't always start

Probably 90% of the time, callbacks won't work. And so my picture is never saved.

What am I doing wrong?

   @Override
public boolean onTouchEvent(MotionEvent event)
{
    boolean result = super.onTouchEvent(event);

       int action = event.getAction();
       if(action == MotionEvent.ACTION_DOWN)
       {
           takePicture();

           this.finish(); // ERROR IS HERE. Closing down before callback is done.

       }    
       return result;
}

private void takePicture() {
    if (mCamera != null)
        mCamera.takePicture(shutterCallback, null, jpegCallback);     
}

ShutterCallback shutterCallback = new ShutterCallback() {
      public void onShutter() {

          AudioManager meng = (AudioManager) getBaseContext().getSystemService(Context.AUDIO_SERVICE);
            int volume = meng.getStreamVolume( AudioManager.STREAM_NOTIFICATION);

            if (volume != 0)
            {
                    MediaPlayer _shootMP = MediaPlayer.create(getBaseContext(), Uri.parse("file:///system/media/audio/ui/camera_click.ogg"));
                    _shootMP.start();
            }
      Toast.makeText(CameraActivity.this, "Picture Taken", Toast.LENGTH_SHORT).show();
      }
};

PictureCallback rawCallback = new PictureCallback() {
      public void onPictureTaken(byte[] _data, Camera _camera) {
        // TODO Do something with the image RAW data.
          int test = 1;
      }
};

PictureCallback jpegCallback = new PictureCallback() {
  public void onPictureTaken(byte[] _data, Camera _camera) {
      File photo=new File(Environment.getExternalStorageDirectory(), "photo1.jpg");

      if (photo.exists()) {
            photo.delete();
      }

      try {
        FileOutputStream fos=new FileOutputStream(photo.getPath());

        fos.write(_data);
        fos.close();
      }
      catch (java.io.IOException e) {
        Log.e("PictureDemo", "Exception in photoCallback", e);
      }



      SqlDB.SavePhoto(1, _data);      
  }
};