Android RecyclerView数据更新后视图不刷新，如何解决？

userRecyclerViewAdapter adapter = new userRecyclerViewAdapter(this.fragment.getActivity());
this.binding.users.setAdapter(adapter);
this.binding.users.setLayoutManager(new LinearLayoutManager(this.fragment.getContext()));

public void getData(boolean append) {
    // ... 省略部分代码
    userApi api = new userApi(activity);
    api.index(dto)
            .thenAccept((response) -> {
                List<IndexUserApiResponseDto.User> data = res.getContent();
                userRecyclerViewAdapter adapter = (userRecyclerViewAdapter) this.binding.users.getAdapter();
                List<userRecyclerViewAdapter.Item> items = new ArrayList<>();
                data.stream().forEach(user -> {
                    IndexUserApiResponseDto.User.UserArchive userArchive = user.getUserArchive();
                    if (userArchive != null) {
                        userRecyclerViewAdapter.Item item = new userRecyclerViewAdapter.Item();
                        item.setCover(userArchive.getCover());
                        // ...  设置item的其他属性
                        items.add(item);
                    }
                });
                // 更新UI必须在主线程
                activity.runOnUiThread(() -> {
                    if (!items.isEmpty()) {
                        if (append) {
                            adapter.addAll(items);
                        } else {
                            adapter.resetAll(items);
                        }
                        adapter.notifyDataSetChanged();
                    }
                });
            })
            .exceptionally(LogUtils::throwException)
            .thenRun(() -> {
                // ... 省略部分代码
            });
}

public class userRecyclerViewAdapter extends RecyclerView.Adapter<UserViewHolder> {

    private final Activity activity;
    private final List<Item> items = new ArrayList<>();

    // ... 省略部分代码

    public void addAll(List<Item> items) {
        this.items.addAll(items);
    }

    public void resetAll(List<Item> items) {
        this.items.clear();
        this.items.addAll(items);
    }

    @Override
    public void onBindViewHolder(@NonNull UserViewHolder holder, int position) {
        Item item = this.items.get(position);
        holder.getTitleView().setText(item.getTitle()); //确保所有属性都已设置
        // ...
    }

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