Java – Emoji library for Android

I’m new to Android development and am trying this https://github.com/rockerhieu/emojicon/ Library. I don’t understand the instructions on how to use the library. I’ve never used any other library, so someone can post a step-by-step approach to using this library for my android project in Android Studio.

EDIT: By use I mean how to include it into my project, it turns out it’s as simple as adding a line to a gradle file.