public void getCroppedImageAsync(int reqWidth, int reqHeight, RequestSizeOptions options) {
    if (mOnCropImageCompleteListener == null) {
      throw new IllegalArgumentException("mOnCropImageCompleteListener is not set");
    }
    startCropWorkerTask(reqWidth, reqHeight, options, null, null, 0);
  }
Gets the cropped image based on the current crop window.<br>
The result will be invoked to listener set by {@link
#setOnCropImageCompleteListener(OnCropImageCompleteListener)}.

@param reqWidth the width to resize the cropped image to (see options)
@param reqHeight the height to resize the cropped image to (see options)
@param options the resize method to use, see its documentation
core/src/main/java/com/theartofdev/edmodo/cropper/CropImageView.java