I often program Android in Emacs as well. I use the Java Development Environment for Emacs and have been happy with it.
If you add an Android-specific class like TextView in your code, you can easily have Android Studio add the needed import command for it.
With Emacs/JDE, I point my jde-global-classpath to the Android jar, then when I need to add an import line I highlight the class and do a Control-C, Control-V, Control-Z. It is slightly more convoluted than Studio but works well enough, I could probably automate and simplify it more if I needed to. This was the main shortcut I missed when moving from Eclipse/ADT to Android, but doing this got it back for me.
