I got the same error when trying to install the Android SDK today. The problem was that I installed Eclipse through the Software Center, and it didn't install the "complete" eclipse package.
Go through Synaptic and search for "eclipse." (I'm assuming that this is a meta-package.) Install it if it isn't already. See if that fixes your problem.
If so, it might be worth notifying the powers that be that just using the Software Center to install Eclipse won't fully install everything.
I got the same error when trying to install the Android SDK today. The problem was that I installed Eclipse through the Software Center, and it didn't install the "complete" eclipse package.
Go through Synaptic and search for "eclipse." (I'm assuming that this is a meta-package.) Install it if it isn't already. See if that fixes your problem.
If so, it might be worth notifying the powers that be that just using the Software Center to install Eclipse won't fully install everything.