How to make a .jar out from an Android Studio project

http://stackoverflow.com/questions/21712714/how-to-make-a-jar-out-from-an-android-studio-project

http://dominoc925.blogspot.com/2015/09/how-to-create-and-use-jar-archive-using.html

http://toastdroid.com/2014/03/28/customizing-your-build-with-gradle/

http://tools.android.com/tech-docs/new-build-system/user-guide