Adding module library to android studio via gradle

Adding module library to android studio via gradle

I am trying to add ViewPageIndicator library by Jake Wharton to my
project's module. I know how to do this with a jar file but since this is
a module I am not sure how to add it to the build.gradle file.
This is what my current structure looks like
ExampleProject (Root module) | ------> Example (main module that needs the
library) | ------> PageIndicatorLibrary