Adding a library to android studio

Hi guys, I'm trying to implement this gauge element to an app I am developing. I'm new to android studio and android development in general, so I was wondering if anyone could show me how to get this gauge going in android studio (particularly importing the library) it would be great. https://github.com/pkleczko/CustomGauge

Drag your .jar library into android studio into the "libs" folder (or where ever). Then go into android studio and right click that .jar. There should be a "Add as library" button. :)

It actually says on the github page that you can add it to gradle, which will then pull in the dependency for you.