How to remove border/shadow from lollipop buttons

Question

The buttons looks fine for api < 21. However, the +21 versions creates this border or shadow that is shown on the image below. How do I get rid of it without changeing th

Answer 1

"shadow" effect is added on Lollipop Appcompat theme

add the following line in res/values-v21/styles.xml to remove default shadow

Theme level:

@style/Widget.AppCompat.Button.Borderless

xml layout:

android:stateListAnimator="@null"

Java:

setStateListAnimator(null);

Kotlin:

stateListAnimator = null