title: setting shape and transparency of fragment in android activity
body: <p>I have an activity in android and I want to add a fragment which would appear as in the image below. I want it to have the shape shown and be semi-transparent so that the activity can be seen in the background. Two questions : 1) How do I set the shape of a framelayout? I assume I define the shape in XML and save it as a XML file but which attribute do I use to set the frame layout to have that shape. 2) how do I make the fragment semi transparent, I assume I would use a semi transparent color as the background, but I am not sure.</p>
  
  <p><img src="https://i.stack.imgur.com/tG0sx.png" alt="enter image description here"></p>