I have Eclipse (Indigo Service Release 1, Build id: 20110916-0149) running on Win XP.
I've added https://dl-ssl.google.com/android/eclipse/ and installed 4 plugins, including ADT, and restarted Eclipse. Installed software list shows Android plugins are installed.
But nothing appears in Preferences, and there are no Android-type project in New Projects.
Later I check Eclipse's directories and there were four *.jar archives with these Android plugins, and they weren't unzipped to corresponding directories (like other plugins). I unpacked them so directories same as *.jar names, and started Eclipse again, but nothing happens.
How can I work with ADT plugin in Eclipse?
I just had the same problem on windows 7 running Indigo. I eventually discovered that I had accidentally not run Eclipse as an administrator when I installed the ADT plugin. I solved the issue by uninstalling the ADT plugin, and then re-installing the ADT plugin when running Eclipse as an administrator. Once I did that Eclipse restarted and immediately prompted me for the location of my android SDK.
As far as steps go: