How to remove border only from one side of the element?

Question

I have:

I\'d like to remove this border from the bottom (for example) of the el

Answer 1

It's an xml trick. First you have to fill the layer with a specific color (Line Color). Then you have to fill it with another color (Background Color) while to push the drawing a little bit from the side you want to draw the line. Here is my code:

https://i.stack.imgur.com/ifak8.jpg

Here how it looks: