title: Hide navigation bar for kindle fire 3 and kindle fire HDX
body: <p>My code :</p>
  
  <pre><code> s_activity.runOnUiThread(new Runnable()
              {
                  @Override
                  public void run()
                  {   
                          //hide nub
                          View view = s_activity.getWindow().getDecorView().findViewById(android.R.id.content).getRootView();
                          view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
                  }
              });
  </code></pre>
  
  <p>I use this code to hide the nub bar while playing the game. But it only works with devices:  KF 1, 2. As for KF 3, the nub bar is not really hidden. It's just hidden in 1 second. Then nub bar will show if there is no interaction with the screen.
  So how to nub bar does not show while my application is running??</p>