We use MathJAX to render equations expressed via latex on the browsers. How do you do something similar on the Android platform, if you need to express all mathematical equa
there is jlatexmath or jeuclid but i dont know if it works with android
you can also render a html page save it to the sdcard and then show it using the webview
As a commenter already said, you can use MathJax. There's an open source example android app listed on mathjax.org. For a discussion about it, see the MathJax User Group.
If you need to build a more complex editor, there are a growing number of those built on/with MathJax.
[disclaimer: I'm part of MathJax but not affiliated with any of the above.]