BACKGROUND:
Font files have some advanced tables embedded in them that allowed glyph substitution, combined forms and anchored pairs.
For English speakers, think about having the 3 characters "1", "/", and "2 and the font automatically combines them into a new glyph that looks like a ½
That was a small 1/2 if it doesn't display correctly for you.
QUESTION: Does anyone know if Android supports these advanced typography tables?