How to properly remove padding (or margin?) around buttons in Android?

Question

Currently, I have the following bottom log in button.

When button is not being pressed

When button is being pressed

The XML loo

Answer 1

As simple, use the inset property like:

android:insetTop="0dp"
android:insetBottom="0dp"
android:insetRight="0dp"
android:insetLeft="0dp"