title: Gallery with thumbnails and a big image preview
body: <p>I'd like to create a gallery like this which has bar with small images and a big preview: <img src="https://i.stack.imgur.com/UU7D1.png" alt="gallery"></p>
  
  <p>The point is that I'd like to have some preloading of images etc, so I found <a href="https://github.com/nostra13/Android-Universal-Image-Loader" rel="nofollow noreferrer">Android Universal Image Loader</a>, but it doesn't seem it has the possibility of the top bar with image thumbnails. Could you please give me some hints how it could be modified to achieve it?</p>