android java - how to set subscript and superscript text in string (such as math exponents)

I'm working on an Android app, and I need to be able to include the exponents/powers into a string (Java). I've done some searching and it seems that my scenario is making it difficult. I've looked into options such as ALT+ codes and Unicode. I'm not entirely sure if either of those, or any other options, are actually possible (I know the ALT+ codes only have '1' '2' and '3' subscripts oddly enough).

So, what's my best option, if any?

I'd like to keep it as simple as possible. I have a lot of strings to write (like math problems) and the need to subscript/superscript numbers is random. Can this be done easily?