I have over 3 years of experience in android app development.
You can see some of my projects at my personal Play Store developer account. as well as in my portfolio here.
I do native development with Java and I have worked with REST APIs, SQLite databases, Realm, Google Maps APIs, GCM and Firebase, Admob and countless other 3rd party libraries. As a supporter of open source initiative, I have released source code of some of my personal projects at my github account.