RecyclerView listen to item added

问题

I have a RecyclerView and I use the following line to add new items:

recyclerAdapter.notifyItemInserted(newItemIndex);

Is there a listener I can use to know when the RecyclerView has finished adding the item?

回答1:

I would try creating a subclass of the DefaultItemAnimator overriding the onAddFinished method.

public class MyDefaultItemAnimator extends DefaultItemAnimator {

  @Override public void onAddFinished(RecyclerView.ViewHolder item) {
    super.onAddFinished(item);

    String text = "Add element: " + item.getPosition();
    Toast.makeText(MyActivity.this, text, Toast.LENGTH_SHORT).show();
  }
}

And then:

mRecyclerView.setItemAnimator(new MyDefaultItemAnimator());

In this way you should be notified of when the add animation finished.

来源：https://stackoverflow.com/questions/27633654/recyclerview-listen-to-item-added