在recyclerview的onBindViewHolder中显示进度条

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<Item> itemList;

    public MyAdapter(List<Item> itemList) {
        this.itemList = itemList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Item item = itemList.get(position);

        // 根据需要显示或隐藏进度条
        if (item.isLoading()) {
            holder.progressBar.setVisibility(View.VISIBLE);
        } else {
            holder.progressBar.setVisibility(View.GONE);
        }

        // 设置其他视图组件的内容
        holder.textView.setText(item.getText());
    }

    @Override
    public int getItemCount() {
        return itemList.size();
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TextView textView;
        public ProgressBar progressBar;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.text_view);
            progressBar = itemView.findViewById(R.id.progress_bar);
        }
    }
}