Download Android Essentials by Chris Haseman PDF

By Chris Haseman

Android necessities is a no-frills, no-nonsense, code-centric run throughout the guts of software improvement on Google's cellular OS. This ebook makes use of the improvement of a pattern software to paintings via subject matters, targeting giving builders the basic instruments and examples required to make conceivable advertisement purposes paintings. masking the whole lot of the Android catalog in lower than a hundred and fifty pages is just very unlikely. as an alternative, this publication makes a speciality of simply 4 major subject matters: the applying existence cycle and OS integration, person interface, location-based companies, and networking.

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URL + " ASC"); I’ll now break down what’s happening. You’ll first get the column index of the bookmark URL. Again, because Android provides access to most of its internal data in a SQL format, you should get used to referring to your saved information in a database-centric way. Next you’ll set up the cursor, an object similar to a Java ME RecordStore enumerator and set up your projection string array. Because you’re interested only in the columns containing the URL, you can keep it very simple.

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. info 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.

Raw. test. start(); } Remember, onStart is an overridden method, so you’ll have to call the superclass version of the same function first, or Android will get cranky with you. info 31 create a new media player object. Because a service is a child of the Context class, you’ll pass a pointer to your current context and the static variable representing your test media. At this point, you can call play, and you’re off to the races. Playback should continue in the background with this service until the stopService method is called by your main activity.

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