Installing the Eclipse Plugin for ADT
http://developer.android.com/sdk/installing/installing-adt.html
Download the ADT Plugin
- 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/
Note: The Android Developer Tools update site requires a secure connection. Make sure the update site URL you enter starts with HTTPS.
- Click OK.
- 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.
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.