Book excerpt: Using a hands-on, student-friendly approach, Android Programming Concepts provides a comprehensive foundation for the development of mobile applications for devices and tablets powered by Android. This text explores Android Java and the Android SDK, the implementation of interactivity using touchscreen gesture detection and sensors, and current concepts and techniques for constructing mobile apps that take advantage of the latest Android features. Each chapter features a collection of well-designed and classroom tested labs that provide clear guidance of Android concepts. Each lab is geared toward one or two specific Android concepts, which eliminated distractions and gives the reader better focus on the concepts at hand.