Add Items to top of recyclerview

Question

I have a Recyclerview in my activity. when I pull down it will load new items to recycle view. Now I need to implement pull to refresh the concept to my recyclerview. I have

Answer 1

For perfect control position system, add each item's position in arraylist. For new item position will be 0. Use Comparator and sort items by using Collection Class.

 Collections.sort(arrayOfPosts, new SortPostByPosition()); 
 listAdapter.notifyDataSetChanged();

Here is SortPostByPosition class that compare position of each item.

class SortPostByPosition implements Comparator {
    public int compare(TimelineListData a, TimelineListData b) {
        return Integer.compare(a.position, b.position);
        // you can compare by your own complex formula too
    }
}