The book is dedicated to the development of applications for mobile devices and tablets running the Google Android operating system. Provides general information about the platform. Describes the creation of various types of applications and the use of Android system components and services. The development of the user interface and services is described. Shows the use of Google network services in applications. Interaction with hardware components of an Android mobile device is described. Network connection management and communication via cellular network, mobile Internet and Wi-Fi are considered. Attention is paid to the use of graphic resources and the creation of animation.