Creating and using an SQLite database for data persistence in Android apps. Covers the basics, as well as using foreign keys. Full source included.

Get started with the Room data persistence library, and learn how to create lifecycle-aware components using the Architecture Components Lifecycles library.

Google offers free lessons to help up-and-coming developers build Android apps using Kotlin.

Kotlin offers big advantages over Java for JVM and Android development, and plays nicely with Java in the same projects.