title: Prevent other views than textview to update/redraw when setting text of textview every second
body: <p>I've got a slightly complicated layout, containing several custom-views that each calculate how much space they need and whatnot. At the top of this layout, I've got a TextView which is supposed to count down from say.. 02:04:20 (hh:mm:ss), and update every second.</p>
  
  <p>My problem is not updating the text, the problem is that when I DO update the text, ALL of the views in my layout gets re-drawn.. Also, I'm using a gallery in this layout, so when interacting with the gallery while the text is updated makes the gallery switch INSTANTLY to the place you've selected (even though you're in the middle of switching to a new item in the gallery).</p>
  
  <p>So.. How to update the textview without making other views re-draw?</p>