You should have already downloaded the Android SDK Tools . (If you downloaded the ADT Bundle, you should instead read Setting Up the ADT Bundle .) The SDK Tools package is not the complete SDK environment. It includes only the core SDK tools, which you can use to download the rest of the SDK packages (such as the latest system image). Getting started on Windows Your download package is an executable file that starts an installer.
Before installing the Android SDK, you must agree to the following terms and conditions.
Android Development Tools (ADT) is a plugin for the Eclipse IDE that is designed to give you a powerful, integrated environment in which to build Android applications. ADT extends the capabilities of Eclipse to let you quickly set up new Android projects, create an application UI, add packages based on the Android Framework API, debug your applications using the Android SDK tools, and even export signed (or unsigned) .apk files in order to distribute your application. Developing in Eclipse with ADT is highly recommended and is the fastest way to get started. With the guided project setup it provides, as well as tools integration, custom XML editors, and debug output pane, ADT gives you an incredible boost in developing Android applications. This document provides step-by-step instructions on how to download the ADT plugin and install it into your Eclipse development environment.
1.1. Android Operation System Android is an operating system based on Linux with a Java programming interface. The Android Software Development Kit (Android SDK) provides all necessary tools to develop Android applications. This includes a compiler, debugger and a device emulator, as well as its own virtual machine to run Android programs.
refactoring Eclipse cheatsheets packing Android sources