问如何将ListView适配器转换为RecyclerView适配器？

EN

public class MyVisitorAdapter extends ArrayAdapter<VisitorItem> implements Filterable {

    public ArrayList<VisitorItem> original;
    public ArrayList<VisitorItem> fitems;
    private Filter filter;
    private Context context;

    //This whole class needs to be refactored to support binding with viewholders or add recyclerview. This was a trial run to check out
    //how listview pans out, but forgot to remove and update it later
    public MyVisitorAdapter(Context context, ArrayList<VisitorItem> items) {
        super(context, 0, items);
        this.original = new ArrayList<>();
        this.original.addAll(items);
        this.fitems = new ArrayList<>();
        this.fitems.addAll(items);
        this.context = context;
    }

    @Override
    public void add(VisitorItem item) {
        this.fitems.add(item);
        this.original.add(item);
        notifyDataSetChanged();
    }

    @Override
    public void remove(VisitorItem item) {
        this.fitems.remove(item);
        this.original.remove(item);
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return fitems.size();
    }

    @Override
    public VisitorItem getItem(int position) {
        return fitems.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        LayoutInflater vi = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = vi.inflate(R.layout.item_guest, null);
        VisitorItem item = fitems.get(position);
        if (item != null) {
            TextView firstName = v.findViewById(R.id.firstName);
            firstName.setText(item.firstName);
            TextView lastName = v.findViewById(R.id.lastName);
            lastName.setText(item.lastName);
            TextView email = v.findViewById(R.id.email);
            email.setText(item.email);
            TextView phoneNumber = v.findViewById(R.id.phoneNumber);
            phoneNumber.setText(item.phoneNumber);
            View dividerView = v.findViewById(R.id.item_divider);
            if (getContext() instanceof SubmitGuestsActivity) {
                dividerView.setVisibility(View.GONE);
            }

            if (this.getContext() instanceof MyVisitorActivity) {
                TextView clearButton = v.findViewById(R.id.item_delete_guest);
                clearButton.setVisibility(View.VISIBLE);
                clearButton.setOnClickListener(v1 -> new AlertDialog.Builder(getContext(), R.style.myDialogTheme)
                        .setCancelable(true)
                        .setTitle("Confirm delete")
                        .setMessage("Are you sure?")
                        .setPositiveButton("Yes", (dialog, which) -> {
                            VisitorItem itemToBeDeleted = getItem(position);
                            VisitorItem.delete(VisitorItem.class, itemToBeDeleted.getId());
                            remove(itemToBeDeleted);
                            fitems.remove(itemToBeDeleted);
                            Toast.makeText(getContext(), "Deleted", Toast.LENGTH_SHORT).show();
                        })
                        .setNegativeButton("No", (dialog, which) -> dialog.dismiss())
                        .create().show());
            }

        }
        return v;
    }

    @Override
    public Filter getFilter() {
        if (filter == null) {
            filter = new ItemsFilter();
        }
        return filter;
    }

    private class ItemsFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults();
            String prefix = constraint.toString().toLowerCase();

            if (prefix.length() == 0) {
                ArrayList<VisitorItem> list = new ArrayList<>(original);
                results.values = list;
                results.count = list.size();
            } else {
                final ArrayList<VisitorItem> list = new ArrayList<>(original);
                final ArrayList<VisitorItem> nlist = new ArrayList<>();
                int count = list.size();

                for (int i = 0; i < count; i++) {
                    final VisitorItem item = list.get(i);
                    final String firstName = item.firstName.toLowerCase();
                    final String lastName = item.lastName.toLowerCase();
                    final String email = item.email.toLowerCase();

                    if (firstName.contains(prefix) && lastName.contains(prefix) && email.contains(prefix)) {
                        nlist.add(item);
                    }

                }
                results.values = nlist;
                results.count = nlist.size();
            }

            return results;
        }

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            fitems = (ArrayList<VisitorItem>) results.values;
            MyVisitorAdapter.this.notifyDataSetChanged();
        }
    }
}

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Intent i = new Intent(MyVisitorActivity.this, AddVisitorActivity.class);
        i.putExtra("firstName", mRegisterAdapter.getItem(position).firstName);
        i.putExtra("lastName", mRegisterAdapter.getItem(position).lastName);
        i.putExtra("email", mRegisterAdapter.getItem(position).email);
        i.putExtra("phoneNumber", mRegisterAdapter.getItem(position).phoneNumber);
        i.putExtra("position", position);
        startActivityForResult(i, 202);
    }
});