How to remove button shadow (android)

Question

I want to remove the shadow from the button to make it seem more flat.

I have this right now:

Answer 1

the @Alt-Cat answer work for me!

R.attr.borderlessButtonStyle doesn't contain shadow.

and the document of button is great.

Also, you can set this style on your custom button, in second constructor.

    public CustomButton(Context context, AttributeSet attrs) {
        this(context, attrs, R.attr.borderlessButtonStyle);
    }