I feel like I would take more than 8 extra seconds just writing out and correcting the package names in imports than I would gain by trying to write Java in vim, and I'm saying that as someone who otherwise uses vim/tmux for everything.

I'm liking vim/tmux for Ruby, but for Android Java, so far, the AS plus IdeaVim combo seems nicer than anything I've put together with vim and tmux. Project-wide autocomplete and auto-adding imports plus the debug support is such a time-saver.