needs to reload SliderView's image

My app downloads images from internet and saves them into SD card. However, images need to be shown when they are not downloaded.
I set the `DefaultSliderView` as below:

``` java
SliderLayout imgSlider = (SliderLayout) findViewById(R.id.image_slider);

for (String imgPath : sdPaths) {
File imgFile = new File(imgPath);
Bundle bundle = new Bundle();
bundle.putString("extra", imgPath);

DefaultSliderView view = new DefaultSliderView(this);

view.setScaleType(BaseSliderView.ScaleType.Fit)
.setOnSliderClickListener(this)
.bundle(bundle);

view.image(imgFile);
view.empty(R.drawable.refresh);

imgSlider.addSlider(view);
}
```

Here goes the problem:
When current view's image is downloaded, I cannot update the view immediately. I have to `removeAllSliders` and add them back so it can be shown. Or user swipes to next image then swipe back.
Is there any way to **reload** the image in `DefaultSliderView`?