Android programming step-by-stepThe Android operating system is increasingly seen on smartphones and tablet computers. Likewise, new user applications – or apps for short – are released every day that allow the phone or tablet to be personalized to match their owners’ preferences. The increasing speed and computing power of these portable devices now allow applications to be run that required a desktop PC or custom designed hardware only a few years ago. Meanwhile, any smartphone can determine your exact geographic position, shoot videos – and much more.When it comes to personalizing your smartphone you should not feel limited to off the shelf applications because creating your own apps and programming Android devices is easier than you think.This book is an introduction to programming apps for Android devices. The operation of the Android system is explained in a step by step way, aiming to show how personal applications can be programmed.A wide variety of applications is presented based on a solid number of hands-on examples, covering anything from simple math programs, reading sensors and GPS data, right up to programming for advanced Internet applications. Besides writing applications in the Java programming language, this book also explains how apps can be programmed using Javascript or PHP scripts.