[icebraining]

Hum, an emacs native port for Android has been out for quite a while now [1]. Android is just a Linux system with a weird libc and windowing system.

[1] http://www.emacswiki.org/emacs/EmacsOnAndroid

[catern]

Unfortunately, this "port" is just running ordinary terminal Emacs inside of an Android terminal application. So it's pretty buggy and annoying to use; and you might as well just run it in a chroot.