By Chris Haseman
Android necessities is a no–frills, no–nonsense, code–centric run during the guts of software improvement on Google’s cellular OS. This booklet makes use of the improvement of a pattern program to paintings via issues, targeting giving builders the fundamental instruments and examples required to make conceivable advertisement functions paintings. masking the whole thing of the Android catalog in lower than one hundred fifty pages is just most unlikely. in its place, this ebook specializes in simply 4 major themes: the appliance existence cycle and OS integration, consumer interface, location–based prone, and networking. Thorough, entire, and invaluable paintings at the nuts and bolts of program improvement in Android instance pushed and virtually minded a device for hobbyists and execs who are looking to create production–quality purposes What you’ll examine know the way an Android program capabilities and communicates with the handset that hosts it. understand the complexities of timers, providers, and multimedia playback. Create and reveal a wealthy mixture of custom–rendered monitors and adapted Android widgets. know how location–based providers have gotten a growing number of vital within the cellular international. See the way to use Google’s robust Map device. discover the intricacies of community connectivity within the cellular global. Who this e-book is for This ebook is for pro software program engineers seeking to stream their rules and purposes into the cellular area with Android. the writer assumes the reader has a satisfactory knowing of Java. they need to be ready to write sessions and deal with simple inheritance constructions. This e-book additionally ambitions hobbyist builders seeking to negotiate the complicated minefield of cellular software program. desk of Contents creation the applying consumer Interface situation, position, position Taking Android Out for a stroll Tying on a Bow
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Extra resources for Android Essentials (Firstpress)
Note It is possible to create your own content providers as a way to wrap Android’s SQLite implementation for universal access. You’ll get into how to do this in later chapters. For now you’re just going to handle the “client” side of this content resolver interaction. Android Essentials 35 Android uses a custom implementation of SQLite to store information locally. If you’re not familiar with the basics of SQL, now might be a good time to brush up. I’m going to assume, for the sake of expediency, that you understand basic SQL searching commands.
A view group, in its most basic format, is an object containing one or more views. This object hierarchy allows you to lay out complex user interfaces without having to go through the errorprone process of calculating view rectangles and widget overlap maps. If, on the other hand, that sort of thing is your bag, Android will stay out of the way and let you render in the style of Java ME’s hand-drawn game canvas. In this chapter, you’ll start with basic XML-based screen layouts and move toward the more complex custom canvas drawing.
Since the user wants to add your corporate URL in your fictional “About” section, you’ll have to oblige them. Adding Evil Corporate URLS with a Content Resolver Maybe they aren’t evil, but you’ll add them anyway. Since Apress is probably one of the least evil of companies out there (not that I’m biased, mind you), you’ll let them get away with it, just this once. BOOKMARKS_URI, inputValues); 38 Android Essentials As with most SDKs, there’s more than one way to accomplish the same task. Earlier, you had the more complex way of adding a bookmark.