How to install the Android ADT Plugin in Eclipse?

Question

I followed the instructions on ADT Plugin for Eclipse but I got this message when installing in Eclipse:

Cannot complete the install because one or more requ         


        

Answer 1

This worked for me

1. Go to Help->Install New Software
2. Go to "Available software sources"
3. Check all the boxes
4. Try the official instructions again. http://developer.android.com/sdk/eclipse-adt.html#installing

Answer 2

You shoud set your computer's connection to no proxy, and run eclipse as administrator