title: How to split screen into equal pieces
body: <p>I would like to use some portion of the bottom side for menus or buttons. Then I would like to divide the remaining part into 4 equal pieces to put 4 equal-sized buttons. 
  Top-left button
  Top-right button
  Bottom-left button
  Bottom-right button</p>
  
  <p>Something like this: (I'm not allowed to post images). </p>
  
  <p>I tried 2 relative layouts for bottom and top, then 4 linear layouts for big buttons but failed. There should be an easy way for this without using tons of different layouts. Thanks in advance.</p>