title: How to get the height of recyclerview item in "onBindViewHolder"
body: <p>The height of RecyclerView item is <strong>not fixed</strong>,i need to set the background image for every item,so I want to get the  height of recyclerview's item to resize the Image,but the  <code>itemView.getHeight()</code> always return 0 in <code>onBindViewHolder</code>.</p>
  
  <p>I have try to search many questions or articles,but i still cant get a good soluation.</p>