title: How to remove the black bar appearing at the bottom?
body: <p>I am new to Android Development. I want my app to support the screen size of my device i.e. <code>1080 x 2160 pixels</code>. Currently there is a black bottom bar that is displayed in place of where the navigation buttons would have been. </p>
  
  <p><a href="https://i.stack.imgur.com/mJ5LO.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mJ5LO.jpg" alt="enter image description here"></a></p>
  
  <p>Please note that I do not want <a href="https://developer.android.com/training/system-ui/immersive#java" rel="nofollow noreferrer">Full Screen Mode</a>. <strong>I have disabled the button navigation on my device. It is only for this app that that the bottom black rectangle is showing.</strong> 
  I just want my app to support the gesture navigation system of my device instead of buttons.How do I make the bottom bar go away using Java (<code>Android Studio</code>) so that my app utilizes that space?</p>