By Kyle Mew, Rick Boyer
The Android OS has the most important deploy base of any working method on the earth; there hasn't ever been a greater time to benefit Android improvement to jot down your personal functions, or to make your personal contributions to the open resource community!
This “cookbook” will make it effortless so you might leap to a subject matter of curiosity and get what you want to enforce the function on your personal program. when you are new to Android and research most sensible through “doing,” then this ebook will supply many issues of interest.
Starting with the fundamentals of Android improvement, we circulation directly to extra complicated thoughts, and we'll advisor you thru universal projects builders fight to unravel. the 1st few chapters conceal the fundamentals together with actions, Layouts, Widgets, and the Menu. From there, we conceal fragments and information garage (including SQLite), machine sensors, the digital camera, and GPS. Then we circulate on extra complex themes similar to snap shots and animation (including OpenGL), multi-threading with AsyncTask, and web performance with Volley. We'll additionally display Google Maps and Google Cloud Messaging (also referred to as Push Notifications) utilizing the Google API Library.
Finally, we'll have a look at a number of on-line prone designed specially for Android improvement. Take your software big-time with complete web internet companies with no need to develop into a server admin via leveraging the facility of Backend as a provider (BaaS) services.
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Additional resources for Android Application Development Cookbook Second Edition
Run the application and observe what happens when the activity is interrupted by pressing the Back and Home keys. Try other actions, such as task switching, to see how they impact your application. How it works... Our activity can exist in one of these three states: active, paused, or stopped. There is also a fourth state, destroyed, but we can safely ignore it: ff An activity is in the active state when its interface is available for the user. It persists from onResume() until onPause(), which is brought about when another activity comes to the foreground.
Run the program on a device or emulator. How it works... Every View (and therefore ViewGroup) has a set of layout parameters associated with it. In particular, all Views have parameters to inform their parent of their desired height and width. These are defined with the layout_height and layout_width parameters. We can access this layout information from the code with the getLayoutParams() method. The layout information includes the layout height, width, margins, and any class-specific parameters.
Filename_without_extension>. Android provides a useful variety of Layout classes that contain and organize individual elements of an activity (such as buttons, checkboxes, and other Views). The ViewGroup object is a container object that serves as the base class for Android's family of Layout classes. The Views placed in a layout form a hierarchy, with the topmost layout being the parent. 25 Layouts Android provides several built-in layout types designed for specific purposes, such as the RelativeLayout, which allows Views to be positioned with respect to other elements.
Android Application Development Cookbook Second Edition by Kyle Mew, Rick Boyer