IssueTracker

Component used: Paging3 Version used: alpha06 Devices/Android versions reproduced on: Android 7.1

I'm presenting a list of items using data from a room DB.

    fun getMessages(chat: Chat): Pager<Int, Message> {
        return Pager(
                PagingConfig(pageSize = 3, enablePlaceholders = true)
        ) {
            db.messages.getMessages(chat.id)
        }
    }

Note: The page size is intentionally low to try to debug paging issues, but is higher in production code.

The pager flow is used to produce PagingData passed to a PagingAdapter.

chats.getMessages(chat).flow.map {
  it.map { message -> getEntryForMessages(chatWithUsers, message) }
}.collect {
  adapter.submitList(it)
}

The RecyclerView uses a simple LinearLayoutManager.

Everything work mostly fine except that that latest entry may never be loaded while scrolling (especially when scrolling slowly). The PagingData properly provides a placeholder that is shown in the list, but it never trigger the loading of the last data, and so never replace the placeholder when reaching the end of the list.