I have the Android Developer Tool which shows eclipse version 4.2 (juno).
According to Eclim site required version of Eclim is as
Eclipse 4.3.x (Kepler) (Eclim 2.2.x), Eclipse 3.7.x (Indigo) (Eclim 1.7.x), or Eclipse 3.8 (Eclim 1.7.13 or greater)
I thought eclim 1.7.18 will work with eclipse 4.2. I also tried 2.3 but none are compatible with eclipse 4.2 which comes bundled in ADT. So which version of Eclim should I use?
I got ADT bundle with eclipse 4.2 and installed eclim 2.2.6 which doesn't complain about eclipse's version.
I hope it works for you too.