title: Android - drawText invalidate
body: <p>I am drawing on Canvas about who is on turn now. I am using validate() twice to invalidate the screen and drawing text again. But with invalidate() I am redrawing all board, which last quite a long, is there any way how to invalidate just this part of Canvas?</p>
  
  <p>Thanks</p>
  
  <p>Hmyzak</p>