I believe that the emulator comes with the Android Developer Kit so an IDE shouldn't be essential. However, I use Eclipse just because it gives me a WYSIWYG designer for the screen templates. I got the impression that recently Eclipse support for the Android developer environment has been reduced, but I'm not certain.
You should be able to generate an Android project using the
Maven archetype:generate goal and no IDE at all. And if you change your mind, one of the post-generation goals such as "eclipse:eclipse" can generate the necessary IDE project support files.