I’m using a RecyclerView along with DiffUtil to manage changes in the data list. The issue I’m facing is that when attempting to insert multiple items consecutively into my adapter using AsyncListDiffer and DiffUtil, not all items are displayed correctly in the RecyclerView. Sometimes only the last inserted item is shown, or only some of the items appear.

Here’s how I’m handling item insertion in my adapter:

fun add(item: ItemEntity) {
        val updateList = asyncListDiffer.currentList.toMutableList()
        updateList.add(item)
        asyncListDiffer.submitList(updateList.toList())
     
    }

My implementation of DiffUtil

 private class DiffCallback:DiffUtil.ItemCallback<ItemEntity>(){
        override fun areItemsTheSame(oldItem: ItemEntity, newItem: ItemEntity): Boolean {
            return oldItem.id == newItem.id
        }

        override fun areContentsTheSame(oldItem: ItemEntity, newItem: ItemEntity): Boolean {
            return oldItem == newItem
        }
    }

In my fragment the observer, every time an item is added to the database

 mainViewModel.itemInserted.observe(viewLifecycleOwner){item->
            item?.let{
                adapter.add(item)
            }
        }

1. How can I ensure that DiffUtil properly handles multiple consecutive insertions in my RecyclerView?

2. Are there additional considerations I should be aware of when using AsyncListDiffer and DiffUtil to manage rapid item insertions?

Any help will be welcome thanks

I’ve implemented a RecyclerView with an adapter using AsyncListDiffer and DiffUtil to manage updates in the data list. When I call the add method on my adapter to insert multiple items consecutively, I expected each inserted item to appear in the RecyclerView immediately after the insertion. Specifically, I expected that calling submitList after each insertion would update the RecyclerView to display all inserted items.

However, what actually happens is that sometimes only the last inserted item is displayed, or only a subset of the inserted items appear. It seems that DiffUtil is not correctly detecting and updating the changes for all the items I insert rapidly.