The android tool is a script that lets you create and manage Android Virtual Devices (AVDs) and, if you are developing using Ant, generate template Android projects to help you get started quickly.
For information about how to use the android tool to manage AVDs, see Android Virtual Devices.
For information about how to use the android tool to create or update a project, see Developing in Other IDEs.
Note that if you are developing in Eclipse with the ADT plugin, you will use the android tool to manage the AVDs you create, but you will not use the android tool for creating a project. The ADT plugin provides a New Project Wizard that helps you set up an Android project in Eclipse.
If you are developing in Ant, you will use the android tool to manage your AVDs, and you can also use it to create or update a project.
Note: The android tool replaces the activitycreator tool provided in previous SDK releases.