问题
So at the click of a button I want to hide all bars on top of screen, to disappear. At another click of button I want them all to reappear again. I successfully did that and have the following bars to hide on button click: Status Bar, TabLayout tab fragments, Support Action Bar. Here's what I have.
When I click my "Start" button ^, all these bars on top, hide. But only 1 is left ...
I tried hiding the "getActionBar" but that bar that's left is not it.
According to my styles.xml when I change the color of the 'ColorPrimaryDark', that's the bar that's left:
I tried hiding PopupOverlay and AppBarOverlay, and get nothing.
Here's my XML file for this:
So what can be this mysterious bar that's left? I'm not asking for code, I'm only simply trying to find out if anyone knows what it can be that's left?
来源：https://stackoverflow.com/questions/46737013/android-studio-trying-to-hide-tablayout-statusbar-supportactionbar-and-an-unk