I hide the statusBar in a blank Project ( js , no Framework )
it works almost perfect, but there is 2 Problems:
when I reveal the statusBar by pulling it down, just for 300ms or so it has a white Background until it fully comes down. (Page and action-bar backgroundColor is not white)
statusBar will not goes back automatically up
thanks to Manoj
this solved the problem:
var decorView = window.getDecorView();
decorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
);