By Chris Haseman
Android necessities is a no–frills, no–nonsense, code–centric run in the course of the guts of program improvement on Google’s cellular OS. This e-book makes use of the improvement of a pattern program to paintings via issues, targeting giving builders the fundamental instruments and examples required to make manageable advertisement purposes paintings. protecting the whole thing of the Android catalog in below a hundred and fifty pages is just very unlikely. as a substitute, this ebook specializes in simply 4 major subject matters: the applying existence cycle and OS integration, consumer interface, location–based providers, and networking. Thorough, entire, and precious paintings at the nuts and bolts of program improvement in Android instance pushed and essentially minded a device for hobbyists and pros who are looking to create production–quality functions What you’ll research know how an Android software capabilities and communicates with the handset that hosts it. understand the complexities of timers, providers, and multimedia playback. Create and exhibit a wealthy mixture of custom–rendered displays and adapted Android widgets. know how location–based prone have gotten increasingly more very important within the cellular global. See how you can use Google’s strong Map device. discover the intricacies of community connectivity within the cellular global. Who this ebook is for This publication is for pro software program engineers seeking to movement their rules and purposes into the cellular house with Android. the writer assumes the reader has a satisfactory figuring out of Java. they need to have the capacity to write periods and deal with simple inheritance buildings. This ebook additionally objectives hobbyist builders trying to negotiate the advanced minefield of cellular software program. desk of Contents advent the applying person Interface situation, situation, situation Taking Android Out for a stroll Tying on a Bow
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Additional resources for Android Essentials (Firstpress)
You’ll add a simple login Android Essentials 51 screen to the aforementioned “socially awkward” application (see Code Listing 3-1). The first task is to describe what the screen will look like in a new view. You’ll use a linear layout so you can just add widgets vertically. (Note that this XML requires a general_bg image and the disclaimer string to be defined in the res folder. ) Code Listing 3-1. com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:scrollbars="vertical">
3. The service class, called PrankService, listening for the PrankActivity’s intent, would start and begin to play an obnoxious, predefined audio file. It would continue to play until it was told to stop by the PrankActivity’s call to the method stopService. Android Essentials 33 Note This sample application does not deal with the handset’s native SMS application. Because all intent receivers are notified of an incoming intent, your application will be competing for user attention with Android’s SMS inbox application.
You do not have direct access to files inside of a content provider. Don't touch this. ” It’s good to know that even the technical writers for Android’s documentation have a sense of humor. Fetching the User’s Bookmarks It should be obvious, at least at this point, that a developer could do some fairly nefarious things with access to a user’s bookmarks. It’s not clear, at this point, what Android will do to keep this sort of thing from happening. I suppose it’s up to the carriers to lock down or monitor this behavior.