Android 2.2 SDK官方正式版下载

Android是基于Linux内核的操作系统，早期由Google开发，后由开放手机联盟开发。它采用了软件堆层的架构，主要分为三部分。底层以Linux内核工作为基础，只提供基本功能；其他的应用软件则由各公司自行开发，以Java作为编写程序的一部分。另外，为了推广此技术，Google和其它几十个手机公司建立了开放手机联盟。Android在未公开之前常被传闻为Google电话或GPhone。目前最新版本为Android2.2。2010年谷歌开发者大会上，Android2.2发布，名称为Froyo，意为冻酸奶。

就在5月20日的谷歌I/O大会基调演讲中，Android2.2（代号Froyo）正式公布。紧接着没多久，Android2.2 SDK就开始正式提供下载。

此外，Adobe的Flash Player 10.1 for Android也开始正式提供beta下载，但需要使用2.2版本的Android访问，看来只有少量使用2.2的内部人员才能参与测试吧。

Android 2.2系统新增了许多功能，比如便携式热点功能、在Android Browser中增加了对Adobe Flash的支持、以及对Android Market进行了一些完善。谷歌表示，除了新增加许多企业功能之外，Android 2.2在性能和速度上均有提高，给Android浏览器增加了V8 Java脚本引擎，另外还增加了许多新的API和服务。

Android 2.2 SDK 正式版下载地址（官方网站需要翻墙）
http://developer.android.com/sdk/android-2.2.html

Adobe Flash Player 10.1 for Android
http://labs.adobe.com/downloads/flashplayer10.html#android

Quick Start
The steps below provide an overview of how to get started with the Android SDK. For detailed instructions, start with the Installing the SDK guide.

1. Prepare your development computer

Read the System Requirements document and make sure that your development computer meets the hardware and software requirements for the Android SDK. Install any additional software needed before downloading the Android SDK. In particular, you may need to install the JDK (version 5 or 6 required) and Eclipse (version 3.4 or 3.5, needed only if you want develop using the ADT Plugin).

2. Download and install the SDK starter package

Select a starter package from the table at the top of this page and download it to your development computer. To install the SDK, simply unpack the starter package to a safe location and then add the location to your PATH.

3. Install the ADT Plugin for Eclipse

If you are developing in Eclipse, set up a remote update site at https://dl-ssl.google.com/android/eclipse/. Install the Android Development Tools (ADT) Plugin, restart Eclipse, and set the "Android" preferences in Eclipse to point to the SDK install location. For detailed instructions, see ADT Plugin for Eclipse.

4. Add Android platforms and other components to your SDK

Use the Android SDK and AVD Manager, included in the SDK starter package, to add one or more Android platforms (for example, Android 1.6 or Android 2.0) and other components to your SDK. If you aren't sure what to add, see Which components do I need?

To launch the Android SDK and AVD Manager on Windows, execute SDK Setup.exe, at the root of the SDK directory. On Mac OS X or Linux, execute the android tool in the /tools/ folder. For detailed instructions, see Adding SDK Components.

Done!