Download 50 Android Hacks by Carlos Sessa PDF

By Carlos Sessa

Summary

The most sensible programming thoughts are frequently the shortest and simplest—the hacks. during this compact and infinitely precious e-book, Android specialist Carlos Sessa grants 50 hacks that might prevent time, stretch your talents, and even perhaps make you smile.

About this Book

Hacks. shrewdpermanent programming ideas to resolve thorny little difficulties. Ten traces of code that prevent days of labor. The little gem stones you research from the outdated man within the subsequent dice or from the geniuses on Stack Overflow. That's simply what you'll locate during this compact and helpful book.

The identify 50 Android Hacks says all of it. starting from the mundane to the mind-blowing, each one self-contained, absolutely illustrated hack is simply a number of pages lengthy and contains annotated resource code. those functional innovations are geared up into twelve collections protecting format, animations, styles, and more.

What's Inside
• Hack three making a customized ViewGroup
• Hack eight Slideshow utilizing the Ken Burns effect
• Hack 20 The Model-View-Presenter pattern
• Hack 23 The SyncAdapter pattern
• Hack 31 Aspect-oriented programming in Android
• Hack 34 utilizing Scala within Android
• Hack forty three Batching database operations
• Plus forty three extra hacks!

Most hacks paintings with Android 2.x and larger. Version-specific hacks are essentially marked.

Purchase of the print booklet features a unfastened publication in PDF, Kindle, and ePub codecs from Manning Publications.
About the Author
Carlos Sessa is a passionate specialist Android developer. He's energetic on Stack Overflow and is an avid hack collector.

Table of Contents
<ol>• operating your means round layouts
• growing cool animations
• View counsel and tricks
• Tools
• Patterns
• operating with lists and adapters
• precious libraries
• Interacting with different languages
• Ready-to-use snippets
• past database basics
• fending off fragmentation
• development tools
</ol>

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During this pass each parent is responsible for positioning all of its children using the sizes computed in the measure pass. The conclusion is the following: Views get their height and width when the layout happens. Layout happens after the onCreate() method is called, so we get a 0 when we call getHeight() or getWidth() from it. Imagine the XML layout as a cake recipe: the LayoutInflater would be the person in charge of buying all of the items; the bakers would do the measuring and layout of passes; and the view would be the cake itself.

Fade_in in our example, the effect was a fade-in. This technique works equally well with other effects. anim. ImageSwitcher works in the same way, except with images instead of text. 1 The bottom line The TextSwitcher and ImageSwitcher methods give you a simple way to add animated transitions. Their role is to make these transitions less dull and more vibrant. Don’t abuse them; you don’t want your application to look like a Christmas tree! 6+ By default, when you add views to a ViewGroup, they’re instantly added and displayed, but there’s an easier way to animate that action.

Modifying the android:shadowDx and android:shadowDy values differentiates the shadow position from the text position. The shadow radius will give the sensation of the text being brighter. To create the glowing effect, we didn’t use the android:shadowDx or android:shadowDy properties, but we modified the shadow radius to make it look brighter D. 1 The bottom line Making your application look great is the best way to get good reviews in the market. Sometimes, polishing your widgets takes a few more lines of code, but they’re worth it.

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