Still can't remove the shadow below the actionbar. I am using SlidingTabLayout, SlidingTabStrip, and FragmentActivity.
I already tried this:
actionBar.setBackgroundDrawable();
and in SlidingTabLayout:
tabTitleView.setTextColor();
tabTitleView.setBackgroundColor();
However, when setting the background color in tabTitleView
the shadow is gone but I don't see the indicator color anymore.
I found solution on the reddit, you should to set windowContentOverlay to @null by defauld in your style.xml
Or try this method from Android SDK to your action bar