title: Removing transparent area in ImageView
body: <p>I have one mask image, this image is transparent and I will change the image size dynamically. The problem is that the image is displayed in a square/rectangle form. The <code>ImageView</code> is also displaying the transparent area image, so how to remove the transparent area?</p>
  
  <p>The image is:</p>
  
  <p><img src="https://i.stack.imgur.com/d6Onq.png" alt="Mask Image"></p>