One big thing about displaying images is being able to zoom in and out of them, which is a massive task, but the developer of Reddit Sync recently open-sourced his solution.
The library is very small to use, totalling 2 files (which could be reduced down to 1). Just download the files, add to your project and you’ve got image zooming nearly.
The XML or Code is basically a case of changing
ZoomableImageView and then setting a bitmap to show and it’s done! Unfortunately, there isn’t much else too it, it just works!