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Using the Eclipse GUI does not allow one to easily: (a) Add custom build steps (b) Use an automated build system (c) Use build configurations (d) Build the release project with one command.Fortunately, the Android SDK comes equipped with support for Ant.This tutorial will show you how to incorporate an Ant build script into your Android projects,even if you still develop with Eclipse.

"First off, the difference between android:gravity and android:layout_gravity is that android:gravity positions the contents of that view (i.e. what's inside the view), whereas android:layout_gravity positions the view with respect to its parent (i.e. what the view is contained in). "

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!

" In the latest Android Design in Action Roman Nurik (watch in YouTube) did a great roundup of UI design patterns that have not yet made their way to the official guidelines but are starting to appear in apps more frequently"

Holo Everywhere is an android library /extension to be able to use Holo theme on older android devices as well 

The was created for the purpose of optimizing Android layouts by reducing the number of levels in view trees.When the LayoutInflater encounters this tag, it skips it and adds the children to the parent.You can also use when you create a custom composite view. 

" I will walk through the 4 kinds of Relative Layout use cases. 1.Target view position in relation to parenting View Group (i.e. a layout container) 2.Target view alignment in relation to parenting View Group 3.Target view position in relation to another View 4.Target view alignment in relation to another View We'll use Jack and Jill buttons to demonstrate this. The first two categories are in relation to a parent layout (Jack and the parent view group). The last two categories show laying out in relation to another View (i.e. Jack + Jill)"

using easing for servo motoers

实用工具介绍，以前自己偷懒了

像JQuery一样的语法来操作Android UI elements

ICS-centric design 的开源Library

想到就悶 官方擴充套件既然要主推Action Bar pre3.0還要去找第3方套件。 雖然後來他們也有出Action Bar compatibility， 但真的是不好用。

Google Android在Design方面一直是一个赶超者，直到ICS才多少得到些尊重。这才名正言顺的出了一系列"范式"。 在此之前，都是依赖开源社区的"试探性"的尝试，这些尝试"是否能用"尚且还是个未知数，就更别说"是否好用"了。 终于Android开始要'统一江湖'了，积极的第三方开发者也开始认可'统一'的方向，这是件好事. ICS的设计很优雅，更重要的是官方多次突出强调与iOS的区别，这让我很有归属感 :)