runtime retrieve layout label font

hey guys i wonder how i could runtime retrieve the font of some layout label.

something like:
View.findDrawableById("label_id").getFont();
View.findDrawableById("label_id").mFont;
View.findDrawableById("label_id").font;
View.findDrawableById("label_id")[:mFont];

i yearn that so i can define a clipping area as function of label dimensions.
there must be any better pratice i guess. what do you say?