Tell RecycerView to fetch more items programmatically?

Question

I'm using a RecyclerView in conjunction with PagedListAdapter to fetch images from a rest API. The RecyclerView fetches more images as needed when I scroll through it. I would like to simulate scrolling very fast through the RecyclerView but still have onBindViewHolder() get called for each item since the logic inside there is important. Ideally I would like to be at position 50 in the RecyclerView and be able to do something like mRecyclerView.scrollToPosition(300); but that doesn't work since position 300 doesn't exist yet.

Is there a way to programmatically scroll the recyclerView so that it effectively does the same thing as me manually scrolling through it?

Do you want to smooth scroll to position 300? Or instantaneously scroll to it? — user1506104, Oct 19 '18 at 21:41
Seems that you need to adjust the settings in `PagedList.Config` (https://developer.android.com/reference/android/arch/paging/PagedList.Config.html#enablePlaceholders) so that either you allow for the list to be all the items, or increase the `prefetchDistance` so that when you are at position 50 the item in position 300 is prefetched. — frozenkoi, Oct 19 '18 at 23:28

score 0 · Answer 1 · answered Oct 19 '18 at 23:12

0

you can use scrollTo() as following

mRecyclerView.post(new Runnable() {
        @Override
        public void run() {
            mRecyclerView.scrollToPosition(POSITION_TO_SCROLL_TO);
        }
    });

answered Oct 19 '18 at 23:12

Basil

845
9
24

Tell RecycerView to fetch more items programmatically?

1 Answers1