CardView has extra margin in each edge on Pre-Lollipop

Question

Here are two pictures.

on Lollipop:

on Pre-Lollipop:

Answer 1

Before L, CardView adds padding to its content and draws shadows to that area. This padding amount is equal to maxCardElevation + (1 - cos45) * cornerRadius on the sides and maxCardElevation * 1.5 + (1 - cos45) * cornerRadius on top and bottom.

From the CardView reference here

Try setting a negative left margin on the CardView like this

You may need to adjust the margin to get the desired result.

PS, this is kind of a hack-y way to do it.