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:
If you are going to reinstall as administrator make sure to remove the ADT Plugin from the Windows > Preferences > Install/Update > Available Software Sites.
Also something that may help is when installing the ADT Plugin you get the option for Developer Tools which the http://developer.android.com/sdk/installing/installing-adt.html guide tells you to select, but make sure to also select NDK Plugins.
And as usual do this while running as administrator. It probably doesn't make a difference but instead of clicking restart I closed Eclipse and reopened as administrator each time it was necessary.
As far as I can tell the NDK Plugin was the only thing I did differently when I finally got it to work.
I have Ubuntu , to make story short, I tried every advice here, nothing helped (reinstall, ADT removal- adding, run as sudo, deleting .eclipse folder etc). The cause of problem was running eclipse updates.
So, I downloaded ADT bundle as zip - adt-bundle-linux-x86_64-20130729 unpacked it, run eclipse inside it, used existing workplace, and it worked, 'android' option appeared in Preferences. However, there is no longer 'eclipse' splash logo at start-up, it's now called Android Developer Tools Build: v22.0.5-757759
The real solution to this issue is that you MUST run Eclipse as an Administrator before you install. There are a number of plugins that have this same issue.
I encountered the same problem today, and a simple removal of the installed plugin is not helpful. My final solution is:
Remove the Android DDMS, Android Development Tools, Android Hierarchy Viewer, Android TraceView and Tracer for OpenGL ES first.
Remove the com.android.ide.eclipse.adt.package_version_info and other adt related jar directory under eclipse_home/plugins/. It is very easy to recognize based on its version_info on its name.
Modify the artifact.xml under eclipse_home, remove all artifact tag related with 'adt'.
Reinstall Android ADT again with Admin Privilege.
You should install start SDK package (download), after that install android packages by windows/SDK manager. After that you§ll see everything you've mentioned