Base line of Mathematics operator in TextView?

Question

I have to draw mathematical equations like x - (20 * x)/100 in TextView and it has to seems like this:

I use ReplacementSpan to add fraction on the baseline of TextView.But it seems that mathematical operators do not aligned respect to the base line of TextView.So result is like this:

Now I want to know how I can find the baseline of mathematical operator to align the fraction with respect to it?

Answer 1

use

Paint.getTextBounds with "-" text