Scroll

@Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
        if (newState == AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
            isScrolling = true;
        }
    }

@Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        int currentItems = mLayoutManager.getChildCount();
        int totalItems = mLayoutManager.getItemCount();
        int scrollOutItems = mLayoutManager.findFirstVisibleItemPosition();

        if (isScrolling) {
            if ((currentItems + scrollOutItems) == totalItems
                        && scrollOutItems >= 0) {
                    isScrolling = false;
                    mPage++;
                    mScrollCallback.onScrollEnd(mPage);

            }
        }
    }