CommonsWare is here to help you through the challenges of Android app development, whether you are new to the platform or are deep into a project!
The Busy Coder's Guide to Android Development offers over 200 chapters of Android knowledge, from the very basics through highly advanced topics.
Not only does subscribing (only $20!) give you that book, but you also get additional books, including:
Elements of Android Jetpack, a second-generation book covering core Android concepts, using the AndroidX libraries and the rest of the Android Jetpack
Exploring Android, a series of hands-on tutorials for creating an Android app from scratch using Kotlin and the Android Jetpack
Elements of Kotlin, to help you get up to speed on the key elements of the Kotlin programming language
Elements of Kotlin Coroutines, covering Kotlin's integrated reactive programming system
Elements of Android Q, a short book on Android Q and what has changed for developers
Android's Architecture Components, for a deep dive into this important set of Android libraries, and Android app architecture in general
GraphQL for Android, for accessing GraphQL-powered Web services from your Android app
Mark Murphy will be at DevFest DC (June 14, Tysons, VA), to talk about storage patterns in Android Q.