Remove action bar shadow

Question

I want to remove the shadow that appears below the appcompat action bar so that the background of the action bar is completely transparent.

This is my theme and action b

Answer 1

Set windowContentOverlay to a drawable that will be drawn under the action bar. If you don't want a shadow set it to null, like so:

<item name="android:windowContentOverlay">@null</item>

and

<item name="windowContentOverlay">@null</item>

This works API level 16 and up.