code: public void setHideFixedToolbarsIfVirtualKeyboard(int value) {
          int oldVal = hideFixedToolbarsIfVirtualKeyboard;
          hideFixedToolbarsIfVirtualKeyboard = value;
          if (oldVal != hideFixedToolbarsIfVirtualKeyboard
                  && content != null && content.isAttached()) {
              processFixedToolbars();
              centerContent();
              initWindowResize();
              if (hideFixedToolbarsIfVirtualKeyboard > 0) initOrientationChange();
          }
      }
docs: Fixed Header and Footer will be hidden if virtual/on-screen keyboard is activated.
  <br> This property is used as threshold(keyboard's height) in pixels
  for keyboard detection (to work must be &gt; 0, default is 0).