Android is the world's favorite mobile operating system and B4A is the easiest Rapid App Development tool, allowing complete beginners to create powerful Android apps. This book, an invaluable work of reference for both beginner and expert, includes step-by-step beginners' guides explaining how to plan, design, develop, test, publish and make money from Android apps in the shortest possible time. It explains how to use B4A to create graphics and databases, to communicate with the user and to modify your app dynamically so it will look good on a wide range of devices. It then gives you a comprehensive reference guide to the B4A language, providing lists, explanations and illustrations of every keyword, object and core library. What readers said about previous versions of this book: "Best money I've spent in a long time. Bravo" JonPM "Excellent! I have no doubt that this will become, or already is, the definitive guide to writing apps for any Android device." Amazon Customer "This was a book that I now use as a constant reference and have found it a mine of information. Brilliantly written and presented." "Excellent book. Just what I was looking for." "I will not now be able to think of developing an app without this book at my side." "This book does an excellent job of explaining most things. Buying this book was money well spent." Richard J. Garcia "A real must-have manual for B4A." Paul Holthuizen "The only one book available with good coverage of this programming language" ALEXEI BOGDANOV "good reference book for an excellent product." Richard Linder "I find it very useful right next to my computer when programming. Very helpful when needed to look something up or to study when not near a computer." Amazon Customer "It is very comprehensive and useful for Android programming." LIm, Bongcheon What developers say about B4A B4A is used by tens of thousands of professional app developers. And their response? They love it. For example they say: "I've [made] more progress with B4A in 3 hours than I have in 3 months with other Android IDEs." Morgan Matthews. "I must say as a Visual Basic expert B4A is the best software purchase I've made in a long time. Within an hour of installing I had a fully functional application running on both my phone and tablet." Dylan Palmer. "[B4A] is the greatest product ever! After spending two months trying to learn Java, I stumbled upon you. I have been a VB programmer for 25 years, and I am in heaven now! Thank you!" Marc Mieher. On-line help is available, but it's not always easy to find the information you want. That's why developer Wyken Seagrave wrote this book, to bring together into one easily accessible work of reference all the information you need to create winning apps.