@Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            final int childCount = recyclerView.getChildCount();
            if (childCount > 0) {
                View lastChild = recyclerView.getChildAt(childCount - 1);
                RecyclerView.Adapter outerAdapter = recyclerView.getAdapter();
                int lastVisible = recyclerView.getChildAdapterPosition(lastChild);
                if (lastVisible == outerAdapter.getItemCount() - 1 && hasNextPage() && canLoadNextPage()) {
                    onLoadNextPage();
                }
            }
        }
A full implement for {@link com.bilibili.boxing.presenter.PickerContract.View} supporting all the mode
in {@link BoxingConfig.Mode}.
use this to pick the picture.

@author ChenSL
boxing-impl/src/main/java/com/bilibili/boxing_impl/ui/BoxingViewFragment.java