Recyclerview Indicates That Reaches the Last Item

Recyclerview indicates that reaches the last item

Thanks to Khemraj who give the tip for solution
because I have a recyclerview inside NestedScrollView and coordinator layout as parent for them

I have solved my problem like this:

public Disposable observeNestedScroll(LoadMoreListener listener) {
    return RxNestedScrollView.scrollChangeEvents(nestedScrollView)
            .subscribe(
                    viewScrollChangeEvent -> {
                        NestedScrollView nestedScrollView =(NestedScrollView) viewScrollChangeEvent.view();
                        if(nestedScrollView.getChildAt(nestedScrollView.getChildCount() - 1) != null) {
                            if ((viewScrollChangeEvent.scrollY() >= (nestedScrollView.getChildAt(nestedScrollView.getChildCount() - 1).getMeasuredHeight() - nestedScrollView.getMeasuredHeight())) &&
                                    viewScrollChangeEvent.scrollY() > viewScrollChangeEvent.oldScrollY()) {
                                listener.onLoadMore();
                            }
                        }
                    });
}

How can I identify that RecyclerView's last item is visible on screen?

One option would involve editing your LayoutManager. The idea here is to find the position of the last visible item. If that position is equal to the last item of your dataset, then you should trigger a reload.

    @Override
    public int scrollVerticallyBy(int dy, RecyclerView.Recycler recycler, RecyclerView.State state) {

        final int result = super.scrollVerticallyBy(dy, recycler, state);

        if (findLastVisibleItemPosition() == mData.length - 1) {
           loadMoreData();
        } 

        return result;

    }

    @Override
    public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
        super.onLayoutChildren(recycler, state);

        if (findLastVisibleItemPosition() == mData.length - 1) {
           loadMoreData();
        } 
    }

Alternatively, you could do this via your adapter's onBindViewHolder method, although this is admittedly a bit of a "hack":

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (position == mData.length - 1) {
            // load more data here.
        }

        /// binding logic
    }

3rd option would be to add an OnScrollListener to the RecyclerView. @velval's answer on this page explains this well.

Regardless which option you go for, you should also include code to prevent the data load logic from triggering too many times (e.g., before the previous request to fetch more data completes and returns new data).

NestedRecyclerView Problem - Last item of the second RecyclerView is duplicated into the first one after the keyboard appears

In SubAdapter, remove the static keyword from your items field:

private static List<Item> items;

Should be this instead:

private List<Item> items;

You should make the same change to your outer adapter, but since there's only one of them at a time it doesn't wind up causing issues.

How do I detect when it comes to the end in recyclerview?

In your adapter, you could use onBindViewHolder then check the position.

public void onBindViewHolder(ViewHolder holder, int position) {
    if (position == getItemCount() - 1) {
        // You are at the end of list
    }
}

RecyclerView doesn't display last item when multiple ViewHolders are used

When i add two items and the header, the header and one item are
displayed.

problem is in your getItemCount method.

override fun getItemCount(): Int {
        return if (items.isEmpty()) 1 else items.filter { it.viewType == ITEM }.size
}

If you want to show 1 header and 2 elements that means that there are must be 3 items in recyclerview, so getItemCount must return 3. But now it looks like getItemCount will return 2, thats why recycerlview doesn't even create third element.

Android - Detect when the last item in a RecyclerView is visible

try working with onScrollStateChanged it will solve your issue

---

Related Topics