User Interface Guidelines
用户接口规范
The Android UI team has begun developing guidelines for the interaction and visual design of Android applications. Look here for articles that describe these guidelines as we release them.
Android UI 组已经开始规范交互和Android应用的界面设计。此处你可以找到我们发行的规范。
Icon Design Guidelines and Android Icon Templates Pack ?
图标设计规范 和 Android图标模版包
Your applications need a wide variety of icons, from a launcher icon to icons in menus, dialogs, tabs, the status bar, and lists. The Icon Guidelines describe each kind of icon in detail, with specifications for the size, color, shading, and other details for making all your icons fit in the Android system. The Icon Templates Pack is an archive of Photoshop and Illustrator templates and filters that make it much simpler to create conforming icons.
一个应用需要很多组图标，从启动图标到菜单，对话框，标签，状态栏到列表。图标规范详细描述了每种图标的大小，颜色，阴影以及其他一些为了让你的图标能适合Android系统的规定。图标模版包是一个如何使用Photoshop和Illustrator模版、滤镜来简化图标创建工作的文档。
Widget Design Guidelines
构件设计规范
A widget displays an application's most important or timely information at a glance, on a user's Home screen. These design guidelines describe how to design widgets that fit with others on the Home screen. They include links to graphics files and templates that will make your designer's life easier.
构件能将重要的、即时的信息更新显示在主屏幕上，方便用户浏览。这些设计规范描述了怎样设计主屏上的兼容构件。他们包含图片文件的链接和那些能简化设计的模版。
Activity and Task Design Guidelines
Activity 和 Task 设计规范
Activities are the basic, independent building blocks of applications. As you design your application's UI and feature set, you are free to re-use activities from other applications as if they were yours, to enrich and extend your application. These guidelines describe how activities work, illustrates them with examples, and describes important underlying principles and mechanisms, such as multitasking, activity reuse, intents, the activity stack, and tasks. It covers this all from a high-level design perspective.
Activities(行为单元) 是基本的、独立的应用组件。当你设计应用的UI和特征集的时候，你可以复用你自己其他应用里头的Activity, 扩展你的应用，使它变得更加丰富。这些规范描述Activities是怎样工作的，并附有用例插图，描述重要的基础原则和机制，像多任务，activity复用，intent，和activity栈、任务。它从高层覆盖到所有这些设计。
Menu Design Guidelines
菜单设计规范
Android applications make use of Option menus and Context menus that enable users to perform operations and navigate to other parts of your application or to other applications. These guidelines describe the difference between Options and Context menus, how to arrange menu items, when to put commands on-screen, and other details about menu design.
Android 应用使用选项菜单和上下文菜单，方便用户操作，或者方便应用之间的导向。这些规范描述选项菜单和上下文菜单之间的区别、怎样排列菜单项，什么时候把命令显示在屏幕上，以及其他一些和菜单相关的设计。