By Jeff Friesen, Dave Smith
Android remains to be one of many prime cellular OS and improvement systems using today's cellular concepts and the apps surroundings. Android appears advanced, yet bargains various equipped improvement kits to these getting into Android with differing programming language ability sets.
Android Recipes: A Problem-Solution procedure courses you step by step via quite a lot of invaluable issues utilizing entire and real-world operating code examples.
during this booklet, you'll begin with a recap of Android structure and app basics, after which get right down to company and construct an app with Google’s Android SDK on the command line and Eclipse. subsequent, you'll how you can accomplish functional initiatives referring to the consumer interface, communications with the cloud, machine undefined, info patience, communications among functions, and interacting with Android itself. eventually, you'll the best way to leverage numerous libraries and Scripting Layer for Android (SL4A) to assist you practice projects extra fast, find out how to use the Android NDK to spice up app functionality, and the way to layout apps for functionality, responsiveness, seamlessness, and more.
rather than summary descriptions of advanced ideas, in Android Recipes, you'll locate reside code examples. if you begin a brand new undertaking, you could think about copying and pasting the code and configuration records from this publication, then enhancing them to your personal customization wishes. this may prevent loads of paintings over making a venture from scratch!
What you’ll learn
* observe Android structure and numerous Android-specific APIs
* find out how to strengthen a unit conversion app within the context of command-line/Android SDK and Eclipse/Android SDK environments
* the way to accomplish a number of projects regarding the consumer interface and extra
* find out how to use exterior libraries to avoid wasting effort and time
* tips on how to quick strengthen an app utilizing the Scripting Layer for Android (SL4A) device
* how you can increase app functionality through the use of the Android NDK
* guidance for designing filtered apps, performant apps, responsive apps, and seamless apps
Who this e-book is for
newbies to Android, in addition to extra entire Android builders.
desk of Contents
* Getting begun with Android
* consumer Interface Recipes
* Communications and Networking
* Interacting with gadget and Media
* Persisting information
* Interacting with the approach
* operating with Libraries
* Scripting Layer for Android
* Android NDK
* App layout directions
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Extra resources for Android Recipes: A Problem-Solution Approach
CHAPTER 1: Getting Started with Android src contains the project’s source code. res contains the following directories: drawable-hdpi contains drawable resources (such as icons) for highdensity screens. drawable-ldpi contains drawable resources for low-density screens. drawable-mdpi contains drawable resources for medium-density screens. xml file in Listing 1–11 is stored in this directory. layout contains layout files. xml file in Listing 1–10 is stored in this directory. values contains value files.
Figure 1–11. Type a command name by itself for command-specific help. CHAPTER 1: Getting Started with Android 1–5. Introducing UC Problem Now that you’ve installed the Android SDK, installed an Android platform, and created and started an AVD, you’re ready to create an app, and install and run this app on the AVD. Although you could create an app based on Listing 1–2’s SimpleActivity class, you’ll probably find this recipe’s UC app to be more interesting (and useful). Solution UC (an acronym for Units Converter) is an app that lets you convert between types of units.
For example, string identifies string resources. main is the name of an int constant declared within layout. This resource ID identifies the main layout resource. xml file that stores the main screen’s layout information. main is UC’s only layout resource. xml. xml’s layout data. This user interface is based on views (abstractions of user interface components) and view groups (views that group related user interface components). View class and are analogous to Java components. ViewGroup class and are analogous to Java containers.
Android Recipes: A Problem-Solution Approach by Jeff Friesen, Dave Smith