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像JQuery一样的语法来操作Android UI elements

Shared by Miracle from China Android Dev

"A collection of useful, open source applications that demonstrate basic features of the Android platform."

"This library provides a version of GridLayout that works across all versions of Android 1.5+. As a side effect, this library also includes the lightweight Space as well."

Using Java annotations, developers can show their intent and let AndroidAnnotations generate the plumbing code at compile time. Few Features are * Dependency injection: inject views, extras, system services, resources, ... * Simplified threading model: annotate your methods so that they execute on the UI thread or on a background thread. * Event binding: annotate methods to handle events on views, no more ugly anonymous listener classes! * REST client: create a client interface, AndroidAnnotations generates the implementation. * AndroidAnnotations provide those good things and even more for less than 50kb, without any runtime perf impact!

Android, a rich platform for application development, has an attractive set of user interface elements and data-management capabilities. Android also offers a healthy array of interfacing options. In this article, learn how to interact with Android's varied sensor options to monitor your environment. Sample code shows you how to record audio on an Android phone. Want to build your own baby monitor? Unlock your phone or a door with your own voice activation? Learn how to leverage the hardware capabilities of an Android-equipped device.

"We are building a community-written web site which has also been used to create an O'Reilly Cookbook, both about how to build great Android applications. It is full of how-to information along with code snippets that illustrate the ideas presented. It features both how-to's that overlap with the official documentation, and material that goes beyond this to be more tutorial, more in-depth, or explaining "lessons from the trenches": what actually works to get the application functioning well. Unlike most books written by one, two or a few individuals, this one has input from dozens of contributors, who were all able to view and comment on each others' recipes before the book was published. The published version(s) include printed books, eBooks, and other uses"

For a library to be compatible with Android, it can only reference classes available as part of Android and other classes implemented specifically in the library itself.Android Libraries can contain Java classes, resources, and other project information, but not assets. They can reference other libraries and leverage third party JAR files. They have Android manifest files just like regular Android projects. However, they differ from normal Android projects in an important way: they cannot be compiled into their own application packages or deployed onto devices. They can also not be exported as standalone JAR files. Once referenced from an Android project, the library components are incorporated into the Android application that references them at build time and added to the application package. There is no need to declare the component as the library classes are rolled into the APK directly. In terms of compatibility, the Android project must have an API Level higher than or equal to the API Level set in the Android library.