By Zigurd Mednieks, G. Blake Meike, Laird Dornin, Masumi Nakamura

Get completely up to the mark on Android programming, and the way to create updated person studies for either handsets and pills. With this book's greatly revised moment version, you'll specialise in Android instruments and programming necessities, together with most sensible practices for utilizing Android four APIs. If you're skilled with Java or Objective-C, you'll achieve the information beneficial for construction well-engineered applications.

Programming Android is equipped into 4 parts:

• half One is helping programmers with a few Java or iOS event get off to a quick commence with the Android SDK and Android programming basics.

• half delves into the Android framework, targeting person interface and pictures type hierarchies, concurrency, and databases. It's a superb origin for figuring out of ways crucial components of an Android software work.

• half 3 good points code skeletons and styles for accelerating the advance of apps that use net information and Android four consumer interface conventions and APIs.

• half 4 offers functional insurance of Android's multimedia, seek, situation, sensor, and account APIs, plus the local improvement package, allowing builders so as to add complicated capabilities.

This up-to-date variation of Programming Android makes a speciality of the information and developer priorities which are crucial for profitable Android improvement initiatives.

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Extra resources for Programming Android: Java Programming for the New Generation of Mobile Devices (2nd Edition)

Sample text

Some libraries need the ability to create new objects, generically, on your behalf. The JUnit framework, for instance, needs to be able to create new test cases, regardless of what they test. Libraries that marshal and unmarshal code to a persistent store or a network connection also need this capability. Since it would be pretty hard for these libraries to figure out, at runtime, the exact calling protocol for your particular object, they typically require a no-arg constructor. If a class has more than one constructor, it is wise to cascade them, to make sure only a single copy of the code actually initializes the instance and that all other constructors 36 | Chapter 2: Java for Android call it.

Application name This is the application name the user will see. Type Test Application. Package name The package name creates a Java package namespace that uniquely identifies packages in your application, and must also uniquely identify your whole Android application among all other installed applications. It consists of a unique domain name—the application publisher’s domain name—plus a name specific to the application. Not all package namespaces are unique in Java, but the conventions used for Android applications make namespace conflicts less likely.

If you expand the view of the project hierarchy by clicking the “+” (Windows) or triangle (Mac and Linux) next to the project name, you will see the various parts of an Android project. Expand the src folder and you will see a Java package with the name you entered in the wizard. Expand that package and you will see the Activity class created for you by the wizard. R; public class TestActivity extends Activity { /** Called when the activity is first created. main); } } Figure 1-7. The Package Explorer view, showing the files, and their components, that are part of the project If you’ve been following along and see the same thing on your computer, your SDK installation is probably working correctly.

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