Android 9 Libro

Apogeo

Android 9. Guida completa per lo sviluppo di applicazione mobile

Packt Publishing

Android 9 Application Development Cookbook      

Android 9编程通俗演义                                  

Packt Publishing

Android Programming for Beginners - Second Edition: Build in-depth, full-featured Android 9 Pie apps starting from zero programming experience

Parlux

Android Studio 3.2 Development Essentials - Android 9 Edition: Developing Android 9 Apps Using Android Studio 3.2, Java and Android Jetpack

Android 9 Digital Photograpy: The Unofficial Mini-Guide (English Edition)

Area51 Publishing

Android Studio Videocorso. Volume 9              

Android Services & App Development 9.0 (English Edition)

Pinnacle Books

Doctor Who #09: Android Invasion                

[二手旧书9成新]行代码 Android 第3版,郭霖,人民邮电出版社