RecyclerView列表項加載更多按鈕

To implement a “Load More” button in a RecyclerView list, you can follow these steps:

1. Add a “Load More” button at the end of your RecyclerView list layout XML file.

<Button
    android:id="@+id/btnLoadMore"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Load More"
    android:visibility="visible" />

2. Create a click listener for the “Load More” button in your RecyclerView adapter class.

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private List<Item> itemList;
    private OnLoadMoreListener onLoadMoreListener;

    // Constructor and other methods here

    public interface OnLoadMoreListener {
        void onLoadMore();
    }

    public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
        this.onLoadMoreListener = onLoadMoreListener;
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        // Bind data to ViewHolder

        if (position == itemList.size() - 1 && onLoadMoreListener != null) {
            onLoadMoreListener.onLoadMore();
        }
    }
}

3. Implement the OnLoadMoreListener interface in your Activity or Fragment where you set up the RecyclerView adapter.

MyAdapter adapter = new MyAdapter(itemList);
recyclerView.setAdapter(adapter);

adapter.setOnLoadMoreListener(() -> {
    // Load more data here
    // Add new items to your itemList
    adapter.notifyItemRangeInserted(itemList.size() - newItemCount, newItemCount);
});

4. When the “Load More” button is clicked, trigger the onLoadMore() method in the adapter to load more data and update the RecyclerView.

By following these steps, you can implement a “Load More” button in your RecyclerView list to load additional items as needed.