By Shane Conder, Lauren Darcey, Joseph Annuzzi Jr.
Bonus KitKat fabric is accessible for obtain at www.informit.com/title/<wbr>9780321940261
What each Android™ App Developer should still recognize this day: Android instruments, App/UI layout, trying out, Publishing, And More
Introduction to Android™ program improvement, Fourth Edition
This absolutely remodeled variation of a confirmed name is the main invaluable real-world advisor to development powerful, commercial-grade Android™ apps. The content material is revised and up to date for the newest Android 4.3 SDK and the most recent improvement most sensible practices. creation to Android™ Application improvement: Android necessities covers all you must speedy begin constructing expert apps for today’s Android units. 3 professional builders consultant you thru constructing your improvement surroundings, designing person interfaces, constructing for varied units, and optimizing all your app-development process—from layout via book. up-to-date all through, this name comprises huge assurance of the main important new Android instruments and utilities. It provides an all-new bankruptcy on making plans an awesome Android app person adventure, plus large new assurance of unit trying out, dialogs, personal tastes, and app publishing. all through, key thoughts are taught via transparent, updated instance code.
This version bargains
• totally up to date introductions to the newest Android 4.3 APIs, instruments, utilities, and top practices
• updated techniques for leveraging new Android services whereas protecting compatibility
• Navigation styles and code samples for providing extra intuitive person experiences
• Example-based factors of ActionBars, DialogFragments, and different key concepts
• specialist automatic checking out recommendations to quick enhance code quality
• New Google Play Developer Console app publishing recommendations that still supply extra control
For Android builders in any respect degrees of expertise, this reference is now extra worthwhile than ever. scholars, teachers, and self-learners will specifically delight in new chapter-ending questions and routines, rigorously designed to check wisdom and deepen mastery.
Note: This remodeled, newly titled version is a whole replace of Android™ Wireless program improvement, quantity I: Android necessities, 3rd Edition
Read or Download Introduction to Android Application Development: Android Essentials (4th Edition) (Developer's Library) PDF
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Extra resources for Introduction to Android Application Development: Android Essentials (4th Edition) (Developer's Library)
USING UTILITY FUNCTIONS Functions in CoffeeScript are so easy to define they quickly become ubiquitous: written in good style, a non-trivial CoffeeScript program often uses a lot of small functions to make repetitive tasks easier. I call these utility functions, although there’s nothing special about them in terms of CoffeeScript: it’s just a natural consequence of the language. Within this slideshow, you need to be able to change CSS attributes at run-time: the images can slide in either direction.
I call these utility functions, although there’s nothing special about them in terms of CoffeeScript: it’s just a natural consequence of the language. Within this slideshow, you need to be able to change CSS attributes at run-time: the images can slide in either direction. By convention in this code, a direction of 1 means “slide from left to right”, while any other value means “slide from right to left”. Rather than hard-coding a specific set of styles for each direction it would be better to parameterize the CSS, but at this point you run into a problem with CoffeeScript.
For example, when counting from 0 to 7, the resulting series modulo 4 would go from 0 to 3 twice (0%4 is 0, 3%4 is 3, 4%4 is 0 again, 5%4 is 1 again). This is often used in web development where repetitive patterns are used—a loop value modulo 2 is often used to color the alternate rows in a table, for example. In this example, calculating the result modulo the number of panels ensures the counter never runs off the positive end of the array: It’s always wrapped back to 0. When working backwards through the panels though, modulo itself doesn’t offer much help—it’s quite happy to work through negative numbers, rather than wrapping –1 back to the number of panels.