Download 50 Android Hacks by Carlos Sessa PDF

April 4, 2017 | Programming | By admin | 0 Comments

By Carlos Sessa


The top programming innovations are frequently the shortest and simplest—the hacks. during this compact and infinitely valuable ebook, Android professional Carlos Sessa offers 50 hacks that would prevent time, stretch your talents, and perhaps even make you smile.

About this Book

Hacks. shrewdpermanent programming options to unravel thorny little difficulties. Ten traces of code that prevent days of labor. The little gemstones you research from the previous 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 astounding, every one self-contained, totally illustrated hack is simply a number of pages lengthy and comprises annotated resource code. those functional ideas are equipped into twelve collections masking structure, 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 inside of Android
• Hack forty three Batching database operations
• Plus forty three extra hacks!

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

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

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

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Sample text

2 Creating the CascadeLayout In this section, we’ll code the custom ViewGroup. 2. Call the custom ViewGroup: CascadeLayout. CascadeLayout> Now that you know what you need to build, let’s get started. The first thing we’ll do is define those custom attributes. > We’ll also use default values for the horizontal and vertical spacing for those times when the user doesn’t specify them.

2 Ken Burns effect example taken from Wikipedia 26 CHAPTER 2 Creating cool animations In this hack, I’ll show you how to mimic the Ken Burns effect in an image slideshow. To do this, we’ll use a library created by Jake Wharton called Nine Old Androids. 0 animation API in older versions. To create the Ken Burns effect, we’ll have a number of preset animations. These animations will be applied randomly to an ImageView and, when the animation is finished, we’ll start another animation with the next photo.

6+ When you want to do something that depends on a widget’s width and height, you might want to use View’s getHeight() and getWidth() methods. A common pitfall 35 Getting the view’s width and height in the onCreate() method for new Android developers is trying to get a widget’s width and height inside the Activity’s onCreate() method. Unfortunately, those methods will return 0 if you call them from there, but I’ll show you an easy way around this. Let’s first see why we get a 0 when we ask for the view’s sizes inside the Activity’s onCreate() method.

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