how to load more items in RecyclerView in .net android?

Question

in .net android(not maui). how to use RecyclerView to load more items when I scroll down to bottom? the Layout is GridLayoutManager and there may be 5 columns in the view.

Answer 1

Hello,

You could implement this feature by listening to scrolling.

For RecyclerView, DotNet Android is no different from Android native, so you need to refer to the Android native documentation.

• RecyclerView.

In .NET, you could implement a listener at the bottom of the scroll using the following code.

recyclerView.AddOnScrollListener(new MyOnScrollingListener());

public class MyOnScrollingListener : RecyclerView.OnScrollListener
{
    public override void OnScrollStateChanged(RecyclerView recyclerView, int newState)
    {
        base.OnScrollStateChanged(recyclerView, newState);
        GridLayoutManager gm = (GridLayoutManager)recyclerView.GetLayoutManager();
        int totalItemCount = recyclerView.GetAdapter().ItemCount;
        int lastVisibleItemPosition = gm.FindLastVisibleItemPosition();  //Get the coordinates of the bottommost element
        int visibleItemCount = recyclerView.ChildCount;

        if (newState == RecyclerView.ScrollStateIdle
                && lastVisibleItemPosition == totalItemCount - 1
                && visibleItemCount > 0)
        {
            // load more
        }
    }
}

Best Regards,

Alec Liu.

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