title: Draw shape with 4 points and pull angles via user Event Touch(on this points)
body: <p>I want to make an shape with <strong>4 points</strong>,then draw and provide to pull angles for user,via touch Events.<br>
  E.g. i have an ImageView,where ill fill with an image taken from gallery/camera(nevermind), after that must appear that Shape <strong>with 4 points</strong>(i think that each point will be an image as little circle) and user can change angles via touch to this Point.<br>
  This points is like coordinate,where i want to get this values and make some kind of Perpesctive. 
  <a href="https://i.stack.imgur.com/YCvXR.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YCvXR.jpg" alt="Exmaple,what i need"></a></p>
  
  <p>In others words:  </p>
  
  <ol>
  <li>ImageView filled with image -> Appears drawed shape with 4 points</li>
  <li>User put this points as he want</li>
  <li>When work is done,take this coordinates to make an perspective.  </li>
  </ol>
  
  <p>So how can i achieve this? Thanks!!</p>