title: android horizontal scroll button to middle of screen
body: <p>I have a horizontal scroll bar that holds 12 buttons, I want to scroll to a specific button to be the middle of the screen, </p>
  
  <p>Currently I am using</p>
  
  <pre><code>monthScrollView.smoothScrollBy((int) buttons.get(arrayNumber).getX(),0);
  </code></pre>
  
  <p>Which scrolls the button just off the screen, so how to I find the value of half the screen to subtract?</p>