This is a one-day tutorial in writing Android apps with the application Eclipse. An app is made of two parts: a screen layout written in XML (Extensible Markup Language), and objects written in Java. Learn how the two halves of the app communicate with each other. Draw text and graphics on the screen, detect and respond to a touch, perform simple animations, display controls such as buttons and sliders, and play background music. Two examples of Android design patterns: plugging a "listener" into a "view" to make it touch-sensitive; and plugging an "adapter" into an "adapter view" to let it read items from a source of data.Hardware and software: Macs or PCs with the JDK (Java Development Kit), the application Eclipse (currently version 4.2 [Juno]), Android SDK and ADT.