Android UX and interaction design leads Helena Roeber and Rachel Garb gave a talk at Google I/O this year about the Android Design Principles (ADP) they helped create and introduced back in 2012 ...

Students learn the fundamental principles of Android components, application architectures, and common Android libraries to create non-trivial mobile applications. The course may be taken on its own, ...

The lessons cover design layout using XML, using Java to make an app interactive, and working with the Android Framework and Control Flow to get a taste of Object Oriented Programming.

It is available as a fully-supported programming language within Android Studio 3.0. According to the Kotlin website, users include Pinterest, Evernote, Uber, and Atlassian.