title: Dynamically add more cards in a list Row android TV leanback
body: <p>I am working on a Android TV app for quite some time now and I have come far while working on it. I am trying to develop an app like popcorn time but it's for Google nexus TV box.
  The problem where I am stuck in, is really simple but even after a lot of effort I am still unable to figure out the solution.
  I am fetching the json data from my database which has all the movies details and links and this works perfectly fine.
  <a href="http://i.stack.imgur.com/muSk9.jpg" rel="nofollow">Over all app view</a></p>
  
  <p>Now those who have used the you tube app on Android TV must have noticed that it was built on leanback and as you scroll down in a listrow more cards are added into a row and likewise the app made the json calls to fetch more data according to the category we are scrolling in. (that's what I want to do)</p>
  
  <p>Right now it is impossible, if I request for large data it takes a long time to fetch everything from the server so I have devised a way via which I can make json calls on scroll but I am unable to present them in a listrow at runtime.</p>