Should the index passed to notifyItemChanged consider placeholder items?

Question

PagingDataAdapter from Paging3 library internally manages two semantically different lists. adapter.snapshot() returns a ItemSnapshotList which includes placeholder elements. adapter.snapshot().items return a List which excludes placeholder items.

Now I had to update an element using it's id. Should find and pass the index based on ItemSnapshotList or List? Eg:

adapter.notifyItemChanged(
    adapter.snapshot().indexOfFirst { it!!.id == id } // is this correct ?
    adapter.snapshot().items.indexOfFirst { it.id == id } // or is this ?
    , PAYLOAD_STATUS to Status.Active  // payloads
)

score 0 · Answer 1 · answered May 05 '22 at 01:39

0

I think it's impossible. Any change on your item,you need to destroy and rebuild the pagingList.

I think the best practice is change in your room, and the list observe the room.

answered May 05 '22 at 01:39

pnkj

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5
17

Sorry that I didn't include in the question. But I just wanted to change part of the view by using `Payload`s. – Sourav Kannantha B May 05 '22 at 04:18
Check now, that I edited the question. – Sourav Kannantha B May 05 '22 at 04:34

Should the index passed to notifyItemChanged consider placeholder items?

1 Answers1