title: Android canvas.drawPath shows hair lines
body: <p>I have several shapes I draw on the screen. Some shapes are positioned against each other without any space ( according the coordinates ).
  My problem is, that I see hair lines between the shapes and I do not understand why ?</p>
  
  <p>Any hints ?</p>
  
  <p>See very small whote lines in the red marked sector.
  <img src="https://i.stack.imgur.com/j3Tmq.png" alt="enter image description here"></p>