How to detect when the user has scrolled up the most element in a RecyclerView

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I have tried writing the following code

@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
  super.onScrolled(recyclerView, dx, dy);
  if(dy > 0){
    //scrolling up
  } else {
    //scrolling down
    int pastVisibleItems = linearLayoutManager.findFirstVisibleItemPosition();
    if (pastVisibleItems  == 0) {
      Toast.makeText(getContext(),"Top most item",Toast.LENGTH_SHORT).show();
    }
  }
}

but it doesn't work. I have also tried using the android's SwipeRefreshLayout to do this since it does what I want which is able to detect when user has scroll to the topmost item. I decided to not use it because I can't seem to prevent the loading indicator from popping out (I don't want to see the loading indicator come out at all).

So, basically what I want to do is:

  1. check user scrolling
  2. is it the topmost item already?
  3. if yes, execute something, if no then nothing

Any idea how to accomplish this?

Thanks.


Replace your code with below code:

@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
  super.onScrolled(recyclerView, dx, dy);

  int pastVisibleItems = linearLayoutManager.findFirstCompletelyVisibleItemPosition();
  if (pastVisibleItems  == 0) {
    Toast.makeText(getContext(),"Top most item",Toast.LENGTH_SHORT).show();
  }
}

it works for me, if you get any error then comment.