When i was beginner then i want to make an Android app on Math tutorial but i faced a problem to show advance Math formulas. But now if you also want to do same thing then i have a great library named Katext MathView Android Layout Library.
It is a KhanAcademy Katex based Library for Rendering math faster in various Android Devices. This a View which is created from extending webview. This view allows you to render latex in your android devices. It can load normal text, text with latex and latex alone. The only thing you have to make sure is your latex should be enclosed inside either $your latex formula$ or $$your latex formula$$. This will also allow you to beautify your formula text by setting color and text size.