Detect when the recyclerview has reached the top most position

Question

I have recyclerview that is used to show the chat. I have set the property of the layoutmanager - stackFromEnd - true which is actually used to reach the bottom of the recyclerview. The issue I am facing is that I want to implement paging in the recyclerview. When the user reaches the top of the page, it should call second page network call. I am unable to create the logic for the same. I am trying to play with the below code but of no use.

if (dy < 0) {
                val visibleItemCount = recyclerView.layoutManager!!.childCount
                val totalItemCount = recyclerView.layoutManager!!.itemCount
                val pastVisibleItems = (recyclerView.layoutManager as LinearLayoutManager).findLastVisibleItemPosition()
                Log.e("&&&", "" + visibleItemCount + " " + pastVisibleItems + " " + totalItemCount);

                if (pastVisibleItems <= 3) {
                    presenter.loadMoreMessages(conversationId)
                }
            }

sasikumar · Answer 1 · 2019-07-25T09:18:24.970

1

Use RecyclerView layout getPosition

val recyclerViewLayoutManager = recyclerView.layoutManager
recyclerViewLayoutManager?.let {
    if (it.getPosition == 0) {
        //do your work
    }
}

edited Jul 25 '19 at 09:18

answered Jul 25 '19 at 08:33

sasikumar

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Unresolved reference on `firstCompletelyVisibleItemPosition()` – Taseer Jul 25 '19 at 09:14
use getPosition() instead of firstCompletelyVisibleItemPosition() – sasikumar Jul 25 '19 at 09:18

score 0 · Accepted Answer · answered Sep 21 '19 at 06:10

As @Taseer Ahmad has suggested, this is the right answer. I am attaching the code snippet.

if (dy < 0) {
                if ((recyclerView.layoutManager as LinearLayoutManager).findFirstCompletelyVisibleItemPosition() == 0) {
                    // load more messages
                }
            }

Detect when the recyclerview has reached the top most position

2 Answers2