title: Creating endless scrolling in RecyclerView like modern google calendar app has
body: <p>I would like to make app with one fragment very similar to plan section in modern google calendar app (<a href="https://i.stack.imgur.com/wnREL.png" rel="nofollow noreferrer">https://i.stack.imgur.com/wnREL.png</a>).</p>
  
  <p>How can I achieve endless scrolling in both direction, loading items asyncly, like google calendar does? I tried using RecyclerView but I don't know how to separate items (in google cal events) to sections like day, week or month and how to achieve endless up scrolling.</p>
  
  <p>I also tried to find google calendar source, but I found only this git repo <a href="https://android.googlesource.com/platform/packages/apps/Calendar" rel="nofollow noreferrer">https://android.googlesource.com/platform/packages/apps/Calendar</a>, that's only built-in android calendar app source, not the modern one with material design. So I suppose that it isn't open source, is it?</p>