Fullscreen with bottom black bar


When I set fullscreen in config.xml:

I get a black bar at the bottom.

My need for that is to use a transparent statusbar and there is one example of it: http://www.martinadamko.sk/posts/translucent-bar-android-278
It says that I need a fullscreen (which is logical, given that statusbar is overlay on top of it).

And transparency for status bar does not seem to work in any case. I get

I have seen the topic here How can I make a transparent toolbar? which discusses how to make toolbar (navbar transparent) instead of statusbar. But that is not my goal.