Zooper installer project.
This library is required for what I have so-far to function: https://github.com/ManuelPeinado/FadingActionBar
You'll need the "Stock" version as a library to the main project. This COULD also be compatible with ActionBarSherlock, but I try to avoid that.
The wallpaper activity can easily be converted into a fragment, as well, if needed. I'm just not sure how to move the "Apply" button into the ActionBar.