Installing the SDK
In this document
androidsdk安装步骤
1. 1. Preparing Your Development Computer
2. 2. Downloading the SDK Starter Package
3. 3. Installing the ADT Plugin for Eclipse
4. 4. Adding Platforms and Other Components
1. Available Components
2. Recommended Components
5. 5. Exploring the SDK (Optional)
6. Next Steps
7. Troubleshooting
See also
1. ADT Plugin for Eclipse
2. Adding SDK Components
This page describes how to install the Android SDK and set up your development environment for the first time.
If you encounter any problems during installation, see the Troubleshooting section at the bottom of this page.
Updating?
If you already have an Android SDK, use the Android SDK and AVD Manager tool to install updated tools and new Android platforms into your existing environment. For information about how to do that, see Adding SDK Components
Step 1. Preparing Your Development Computer
Before getting started with the Android SDK, take a moment to confirm that your development computer meets the System Requirements. In particular, you might need to install the JDK, if you don't have it already.
If you will be developing in Eclipse with the Android Development Tools (ADT) Plugin—the recommended path if you are new to Android—make sure that you have a suitable version of Eclipse installed on your computer (3.4 or newer is recommended). If you need to install Eclipse, you can download it from this location:
/downloads/
For Eclipse 3.5 or newer, the "Eclipse Classic" version is recommended. Otherwise, a Java or RCP version of Eclipse is recommended.
Step 2. Downloading the SDK Starter Package
The SDK starter package is not a full development environment—it includes only the core
SDK Tools, which you can use to download the rest of the SDK components (such as the latest Android platform).
If you haven't already, get the latest version of the SDK starter package from the SDK download page.
If you downloaded a .zip or .tgz package (instead of the SDK installer), unpack it to a safe location on your machine. By default, the SDK files are unpacked into a directory named android-sdk-<machine-platform>.
If you downloaded the Windows installer (.exe file), run it now and it will check whether the proper Java SE Development Kit (JDK) is installed (installing it, if necessary), then install the SDK Tools into a default location (which you can modify).
Make a note of the name and location of the SDK directory on your system—you will need to refer to the SDK directory later, when setting up the ADT plugin and when using the SDK tools from command line.
Step 3. Installing the ADT Plugin for Eclipse
Android offers a custom plugin for the Eclipse IDE, called Android Development Tools (ADT), that is designed to give you a powerful, integrated environment in which to build Android applications. It extends the capabilites of Eclipse to let you quickly set up new Android projects, create an application UI, debug your applications using the Android SDK tools, and even export signed (or unsigned) APKs in order to distribute your application. In general, developing in Eclipse with ADT is a highly recommended approach and is the fastest way to get started with Android.
If you'd like to use ADT for developing Android applications, install it now. Read Installing the ADT Plugin for step-by-step installation instructions, then return here to continue the last step in setting up your Android SDK.
If you prefer to work in a different IDE, you do not need to install Eclipse or ADT, instead, you can directly use the SDK tools to build and debug your application. The developer guide has more information about Developing in Other IDEs.
Step 4. Adding Platforms and Other Components
The last step in setting up your SDK is using the Android SDK and AVD Manager (a tool included in the SDK starter package) to download essential SDK components into your development environment.
The SDK uses a modular structure that separates the major parts of the SDK—Android platform versions, add-ons, tools, samples, and documentation—into a set of separately installable components. The SDK starter package, which you've already downloaded, includes only a single component: the latest version of the SDK Tools. To develop an Android application, you also need to download at least one Android platform and the SDK Platform-tools (tools that the latest platform depend upon). However, downloading additional components is highly recommended.
If you used the Windows installer, when you complete the installation wizard, it will launch the Android SDK and AVD Manager with a default set of platforms and other components
selected for you to install. Simply click Install to accept the recommended set of components and install them. You can then skip to Step 5, but we recommend you first read the section about the Available Components to better understand the components available from the Android SDK and AVD Manager.

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