Installation of ADT

You have to install Eclipse IDE to develop Android applications.

After that install ADT (android development kit) plugin in Eclipse IDE.

ADT Plugin for Eclipse

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 components 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.

Installing ADT Plugin

The sections below provide instructions on how to download and install ADT into your Eclipse environment

• Start Eclipse, then select "Help > Install New Software....
• Click Add, in the top-right corner.
• In the Add Repository dialog that appears, enter "ADT Plugin" for the Name and the following URL for the Location:
  https://dl-ssl.google.com/android/eclipse/
• Click OK Note: If you have trouble acquiring the plugin, try using "http" in the Location URL, instead of "https" (https is preferred for security reasons).
• In the Available Software dialog, select the checkbox next to Developer Tools and click Next.
• In the next window, you'll see a list of the tools to be downloaded. Click Next.
• Read and accept the license agreements, then click Finish. Note: If you get a security warning saying that the authenticity or validity of the software can't be established, click OK.
• When the installation completes, restart Eclipse.

Configuring the ADT Plugin

After you've successfully downloaded the ADT as described above, the next step is to modify your ADT preferences in Eclipse to point to the Android SDK directory:

• Select Window > Preferences... to open the Preferences panel (Mac OS X: Eclipse > Preferences).
• Select Android from the left panel.
• You may see a dialog asking whether you want to send usage statistics to Google. If so, make your choice and click Proceed. You cannot continue with this procedure until you click Proceed.
• For the SDK Location in the main panel, click Browse... and locate your downloaded SDK directory.
• Click Apply, then OK.