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 themes, targeting giving builders the fundamental instruments and examples required to make plausible advertisement purposes paintings. protecting everything of the Android catalog in under a hundred and fifty pages is just very unlikely. as a substitute, this publication makes a speciality of simply 4 major themes: the appliance existence cycle and OS integration, person interface, location–based companies, and networking. Thorough, entire, and precious paintings at the nuts and bolts of program improvement in Android instance pushed and virtually minded a device for hobbyists and pros who are looking to create production–quality functions What you’ll research 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 displays and adapted Android widgets. know how location–based providers have gotten a growing number of vital within the cellular international. See tips to use Google’s strong Map device. discover the intricacies of community connectivity within the cellular global. Who this booklet is for This publication is for pro software program engineers seeking to stream their rules and functions into the cellular area with Android. the writer assumes the reader has a satisfactory figuring out of Java. they need to have the capacity to write sessions and deal with simple inheritance buildings. This publication additionally pursuits hobbyist builders seeking to negotiate the advanced minefield of cellular software program. desk of Contents advent the appliance consumer Interface place, situation, situation Taking Android Out for a stroll Tying on a Bow
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Additional resources for Android Essentials (Firstpress)
Com link. Obviously, if this code were run with the aforementioned Apress URL, you won’t find it. 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.
Android does not give the SDK particular access to the phones filesystem, as Brew does. Nor does it offer a RecordStore, as does Java ME. Your primary method for passing data between your activities, intent receivers, and services is going to be through the ContentResolver superclass. Though you can store data through files, preferences, and other databases, content resolvers can take 34 Android Essentials many forms, and Android ships with a few important content resolvers built in. html#usingacp.
It provides a nonprogrammer interface for mobile screen layout and design. It also gives developers the tools to crack open and modify these values on the fly during runtime, as you’ll do now by exploring how to interact with Android’s built-in widgets. Waking Up the Widgets I’ve already demonstrated how to use Android’s TextView, Button, and EditText widgets. But how useful is a text-entry field if you can’t ingest what your users have entered? That’s a rhetorical question; don’t answer it—I won’t be able to hear you (I hope).