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Download PDF by F. Ableson, et. al.,: Android in Action

By F. Ableson, et. al.,

Android in motion, 3rd version is a entire instructional for Android builders. This fast moving e-book places you within the drivers seat - youll grasp the SDK, construct WebKit apps utilizing HTML five, or even discover ways to expand or change Androids integrated beneficial properties by way of development beneficial and exciting examples.
About the Technology
When it involves cellular apps, Android can do nearly something, and with this ebook, so are you able to! Android, Googles well known cellular working procedure and SDK for capsules and shrewdpermanent telephones, is the broadest cellular platform to be had. it's Java-based, HTML5-aware, and loaded with the gains todays cellular clients demand.
About this Book
Android in motion, 3rd variation takes you a ways past «Hello Android.» Youll grasp the SDK, construct WebKit apps utilizing HTML five, or even learn how to expand or change Androids integrated good points. Youll locate attention-grabbing examples on each web page as you discover cross-platform pix with RenderScript, the up to date notification procedure, and the local improvement equipment. This booklet additionally introduces vital pill ideas like drag-and-drop, fragments, and the motion Bar, all new in Android 3.
Whats Inside
Covers Android 3.x
SDK and WebKit improvement from the floor up
Driving a robotic with Bluetooth and sensors
Image processing with local C code
This ebook is written for hobbyists and builders. A historical past in Java is beneficial. No earlier event with Android is thought.

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Additional info for Android in Action

Sample text

Xml file exists in the root of an application directory and contains all the design-time relationships of a specific application and Intents. xml files act as deployment descriptors for Android applications. xml file. xml file, you see that the manifest element contains the obligatory namespace, as well as the Java package name containing this application. xml file 25 Activity1. Note also the @string syntax. xml file, it references information stored in one of the resource files. In this case, the label attribute is obtained from the string resource identified as app_name.

A number of built-in Intent actions are defined as members of the Intent class, but application developers can create new actions as well. ACTION_VIEW The data component of an Intent is expressed in the form of a URI and can be virtually any piece of information, such as a contact record, a website location, or a reference to a media clip. 1 lists some Android URI examples. The IntentFilter defines the relationship between the Intent and the application. IntentFilters can be specific to the data portion of the Intent, the action portion, or both.

2 Service If an application is to have a long lifecycle, it’s often best to put it into a Service. For example, a background data-synchronization utility should be implemented as a Service. A best practice is to launch Services on a periodic or as-needed basis, triggered by a system alarm, and then have the Service terminate when its task is complete. Like the Activity, a Service is a class in the Android runtime that you should extend, as shown in the following listing. This example extends a Service and periodically publishes an informative message to the Android log.

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Android in Action by F. Ableson, et. al.,

by Donald

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