App Inventor Setup
As you use App Inventor to build apps on your computer, your app will appear bit by bit on your connected Android phone or a running emulator. To make this happen you need to complete the following steps:

Step 1: Set up your computer


Step 2: Do one of the following, depending on whether you will develop on an Android phone or with the emulator:
Set up your Android phone and build your first app with the phone, OR
Build your first app with the emulator
Set up your computer
System requirements:
Computer and operating system

Macintosh (with Intel processor): Mac OS X 10.5, 10.6
Windows: Windows XP, Windows Vista, Windows 7
GNU/Linux: Ubuntu 8+, Debian 5+
Browser

Mozilla Firefox 3.6 or higher
Apple Safari 5.0 or higher
Google Chrome 4.0 or higher
Microsoft Internet Explorer 7 or higher
Test your Java configuration
Your computer needs to run Java 6 (also known as Java 1.6). You can download Java from http://www.java.com.

Test your Java configuration by performing both of the following tests:

Visit the Java test page. You should see a message that Java is working and that the version is Java 1.6.
Visit the Java Web Start Demos page and click on a demo, e.g., Draw. The Java Web Start application will start and download the demo. Your browser should start it automatically. You may need to tell your computer to run the downloaded program with Java Web Start and give the program permission to run. You may also need to configure your browser to open jnlp files.
App Inventor will not work on your computer if these tests do not succeed. Don't go on to try to use App Inventor until you've dealt with the issue.
Install the App Inventor Setup Software
Before you can use App Inventor, you need to install some software on your computer. The software you need is provided in a package called App Inventor Setup. Follow the instructions for your operating system to do the installation.

Instructions for Mac OS X
Instructions for GNU/Linux
Instructions for Windows