Android search view won't work in fragment

Question

When I try to search for members in the search view nothing shows up. Everything just vanishes.

all_members

public class all_members extends Fragment  {
    ProgressDialog pg;

    RecyclerView recyclerView;
    AllMembersCustomAdapter myAdapter;
    RecyclerView.LayoutManager layoutManager;



    ArrayList<AllMembersRecyclerRepresent> members;


    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
        OnBackPressedCallback callback = new OnBackPressedCallback(true) {
            @Override
            public void handleOnBackPressed() {
                FragmentTransaction fr = getActivity().getSupportFragmentManager().beginTransaction();
                fr.replace(R.id.fragment_container,new Home());
                fr.commit();
            }
        };

        requireActivity().getOnBackPressedDispatcher().addCallback(callback);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        //this line is very important the bwlo line will set the search view
        setHasOptionsMenu(true);
        return inflater.inflate(R.layout.all_member, container, false);
    }



    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        pg=new ProgressDialog(getContext());
        pg.setTitle("Please wait...");
        pg.setMessage("Loading all members");
        pg.setCanceledOnTouchOutside(false);
        pg.show();
        setHasOptionsMenu(true);
        super.onViewCreated(view, savedInstanceState);




        recyclerView=getActivity().findViewById(R.id.r_view_member);
        recyclerView.setHasFixedSize(true);
        layoutManager = new LinearLayoutManager(getContext());
        members = new ArrayList<>();
        getvolley();
        Log.d("mem",members.toString());


        recyclerView.setLayoutManager(layoutManager);
        myAdapter = new AllMembersCustomAdapter(members);
        recyclerView.setAdapter(myAdapter);




    }




    public void getvolley(){
        //volley and get all members list

        String url="";

        RequestQueue queue = Volley.newRequestQueue(getActivity());
        JsonArrayRequest requestUrl=new JsonArrayRequest(Request.Method.POST, url, null,new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
                for(int i=0;i< response.length();i++){




                    try {
                        JSONObject jsonObject = response.getJSONObject(i);
                        AllMembersRecyclerRepresent ar= new AllMembersRecyclerRepresent();
                        ar.setName( jsonObject.getString("name"));
                        ar.setSurname( jsonObject.getString("surname"));
                        ar.setPh_no( jsonObject.getString("ph_no"));
                        String id=( jsonObject.getString("member_id"));
                        String email=( jsonObject.getString("email"));
                        String is_active=( jsonObject.getString("is_active"));
                        String dob=( jsonObject.getString("date_of_birth"));
                        String medical_history=( jsonObject.getString("medical_history"));

                        DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
                        LocalDate date = org.joda.time.LocalDate.parse(dob, formatter);
                        ar.setDOB(String.valueOf(date));
                        Log.d("date:",String.valueOf(date));
                        ar.setId(id);
                        ar.setDOB(String.valueOf(date));
                        ar.setEmail(email);
                        ar.setIs_active(is_active);
                        ar.setMedical_history(medical_history);
                        ar.setIs_active(is_active);
                        members.add(ar);




                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                    myAdapter.notifyDataSetChanged();


                }
                pg.cancel();
                Toast.makeText(getContext(), "Total Members: "+myAdapter.getItemCount(), Toast.LENGTH_LONG).show();
                Toast.makeText(getContext(), "Total Members: "+myAdapter.getItemCount(), Toast.LENGTH_LONG).show();

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(getContext(), error+"Something went wrong.\nPlease check your internet connection", Toast.LENGTH_LONG).show();
                pg.cancel();
            }
        });


        MySingleton.getInstance(getActivity()).addRequestQueue(requestUrl);

    }


    @Override
    public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
        inflater.inflate(R.menu.menuu,menu);
        MenuItem item = menu.findItem(R.id.action_search);
        SearchView searchView = (SearchView) item.getActionView();
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                myAdapter.getFilter().filter(newText);
                return false;
            }
        });
        super.onCreateOptionsMenu(menu, inflater);
    }

AdapterCode

public class AllMembersCustomAdapter extends RecyclerView.Adapter<AllMembersCustomAdapter.ViewHolder> implements Filterable {

    private final ArrayList<AllMembersRecyclerRepresent> members;

    //member's list without being filtered
    private final ArrayList<AllMembersRecyclerRepresent>allMembers;

    public AllMembersCustomAdapter(ArrayList<AllMembersRecyclerRepresent> list){
        members=list;
        allMembers=new ArrayList<>(list);
    }



    public class ViewHolder extends RecyclerView.ViewHolder{

        TextView name,surname,ph_no,dob;
        ImageView status;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);

            name=itemView.findViewById(R.id.nameR);
            surname=itemView.findViewById(R.id.surnameR);
            ph_no=itemView.findViewById(R.id.ph_noR);
            dob=itemView.findViewById(R.id.dob_r);
            status=itemView.findViewById(R.id.statusR);

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //this returns the position of the item clicked
                    int position= getAdapterPosition();
                    //members.get(position).getName() this return the data in the array list
//                    Toast.makeText(view.getContext(), "position clicked is "+String.valueOf(
//                            members.get(position).getName()), Toast.LENGTH_SHORT).show();

                    String name= members.get(position).getName();
                    String surname = members.get(position).getSurname();
                    String ph_no = members.get(position).getPh_no();
                    String id = members.get(position).getId();
                    String email = members.get(position).getEmail();
                    String is_active = members.get(position).getIs_active();
                    String dob = members.get(position).getDOB();
                    String medical_history = members.get(position).getMedical_history();



                    Intent i = new Intent(view.getContext(), memberInfo.class);
                    i.putExtra("name",name);
                    i.putExtra("surname",surname);
                    i.putExtra("ph_no",ph_no);
                    i.putExtra("id",id);
                    i.putExtra("email",email);
                    i.putExtra("is_active",is_active);
                    i.putExtra("dob",dob);
                    i.putExtra("medical",medical_history);
                    view.getContext().startActivity(i);
                }
            });


        }

    }

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

    @Override
    public void onBindViewHolder(@NonNull AllMembersCustomAdapter.ViewHolder holder, int position) {

        holder.itemView.setTag(members.get(position));
        holder.name.setText(members.get(position).getName());
        holder.ph_no.setText(members.get(position).getPh_no());
        holder.surname.setText(members.get(position).getSurname());
        holder.dob.setText(members.get(position).getId());
        //setting image
        //volley to see if the member is Active or not

        if(members.get(position).getIs_active()=="true"){
            holder.status.setImageResource(R.drawable.active);

        }else{
            holder.status.setImageResource(R.drawable.inactive);
        }

    }

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


    @Override
    public Filter getFilter() {
        return filter;
    }

    

    Filter filter = new Filter() {
        @Override
        
        protected FilterResults performFiltering(CharSequence charSequence) {
            ArrayList<AllMembersRecyclerRepresent> filteredList = new ArrayList<>();
            if(charSequence==null || charSequence.length()==0){
                //if empty show all movies
                filteredList.addAll(allMembers);
            }else{
                String filterPattern = charSequence.toString().toLowerCase().trim();
                for(AllMembersRecyclerRepresent mem:allMembers){
                    if(mem.getName().toLowerCase().contains(filterPattern)){
                        filteredList.add(mem);
                    }
                }
                }

            FilterResults filterResults = new FilterResults();
            filterResults.values=filteredList;
            return filterResults;
        }



        @Override
       
        protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
            members.clear();
            members.addAll((ArrayList) filterResults.values);
            notifyDataSetChanged();
        }
    };
}

When I click on search the list just becomes blank.

menu

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item android:id="@+id/action_search"
        android:title="SEARCH"
            android:icon="@drawable/search"
        app:showAsAction="always|collapseActionView"
        app:actionViewClass="androidx.appcompat.widget.SearchView"
         />

</menu>

I even tried the same on another activity but still it doesn't work. What am I doing wrong here. The data in the recycler view is being fetched by the server but it won't filter out when clicked on search.