I'm trying to understand how WhatsApp chat screen fetching old chats if we scroll to top.
similarly I wanted to do lazy load on reaching the top of the conversation. in my case assume 10,000 conversations(Obviously can't fetch all 10k items in one shot) in a chat where stored in local.
Initially i'm fetching latest 250 records and auto scrolled to last item in ListView.Builder().
have no clue how the fetch remaining conversations on the top of the List.
Please help me to implement Lazy load here, looking forward for the solution.