title: Android Studio making this blue line at the screen's top disappear
body: <p>I'm sorry for the unclear title , it's just that I don't the name of this thing.
  Anyway , here is a picture of the main screen of the app:</p>
  
  <p><a href="https://i.stack.imgur.com/47Kd5.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/47Kd5.jpg" alt="enter image description here"></a></p>
  
  <p>I want to remove the blue bar/title/line at the top (where it shows the time and battery..)
  If I can't remove it than atleast modify it by changing it color to black of something that suits better the background of the layout.
  Thank you,
  Noam</p>