title: Background for item RecyclerView
body: <p>For the RecyclerView elements I use CardView. I would like to make each item of the list </p>
  
  <p><a href="https://i.stack.imgur.com/SQtjp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SQtjp.png" alt="enter image description here"></a></p>
  
  <p>A background image is not a problem to prepare. I do not specify the size of the CardView, I have specified match_parent and wrap_content. I do not know what size to make a background image, so that it looks fine on the phones and on the tablets.</p>
  
  <p>Any suggestions? Or do I need to specify the width and height of the item for phones and tablets and already do the background for them? How do experienced developers? vector drawable is not interested yet</p>