Android add/replace Items within RecyclerView

Question

I know there are lots of threads already on this topic, but none of the given solutions worked for me so far. I\'m trying to add or update an item of a RecyclerView

Answer 1

Use

 mItems.set(position, newItem);

instead of

 mItems.add(position, newItem);

because .set method will replace your data to particular position.

Answer 2

This should work:

private ArrayList<Item> mItems;

public void replaceItem(final Item newItem, final int position) {
    mItems.set(position, newItem);
    notifyItemChanged(position);
}  

ArrayList.set() is the way to go to replace items.

For adding items, just append them to mItems and then go notifyDatasetChanged(). Another way to go is to use notifyItemRangeInserted(). Depending on where/how are you adding new items and how many of them, it might be worth it.