Android Studio Tab Spacing

Type in 'spac' in the search panel of the settings view.

You will find Editor -> Code Style->Java->Tabs and Indents->Use tab character.

This is a little weird, but others may have the same issue I did.

Yes, follow the above directions, and do the normal changes in the config file. And guess what? it looks like it's still making spaces instead of tabs, even though the settings say TABS, not spaces!

Turn on "show whitespaces" (Editor -> General -> Appearance). And then turn it off. Looks like this is enough to reset the editor so that it is now following the rules you set in the preferences.