How to array of maps (data in firestore) showing firestore recycler view on android studio?

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Java

I am achieving this to Simple Recyclerview but i am issue arising when user add or remove …auto populate not . So FirestoreRecycleAdapter can used? Help me ?

i add all snapshots below


Database structure is

collection>Document> array
>map
pickup= value
drop=value
via=value

What I have tried:

myjouurneyorder Fragment code

public class JourneyOrderFragment extends Fragment {

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    FirebaseFirestore db;
    RecyclerView recview2;

    RecycleAdapter adapter;

    FloatingActionButton fab;
   
     ArrayList<model> datalist;
  
    public JourneyOrderFragment() {
        // Required empty public constructor
    }

    
    // TODO: Rename and change types and number of parameters
    public static JourneyOrderFragment newInstance(String param1, String param2) {
        JourneyOrderFragment fragment = new JourneyOrderFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment 
        View view=inflater.inflate(R.layout.fragment_journey_order, container, false);
       
        recview2 =  view.findViewById(R.id.recview);
        recview2.setLayoutManager(new LinearLayoutManager(getContext()));
        recview2.setHasFixedSize(true);
        
        datalist=new ArrayList<model> ();
       adapter=new RecycleAdapter(datalist);
       
        fab=view.findViewById(R.id.fabbtn);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity(),"you clicked me i am plus button",Toast.LENGTH_LONG).show();
                Intent intent=new Intent(getActivity(),AddJourneyOrder.class);
                startActivity(intent);
            }
        });

         db = FirebaseFirestore.getInstance();
        db.collection("orders").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<QuerySnapshot> task) {
                        if (task.isSuccessful()) {
                            for (QueryDocumentSnapshot document : task.getResult()) {

                                ArrayList<model> journeyorders = document.toObject(modelDocument.class).journeyorders;

                    Log.d(TAG, "the document id is : "+document.getId()+"the document is :"+document.getData());
                    datalist.addAll(journeyorders);

                                recview2.setAdapter(adapter);
                            }
                        } else {
                            Log.d(TAG, "Error getting documents: ", task.getException());
                        }
                    }
                });
        
    
    
        return view;
    }

}

2) model class

package com.example.android.sohan.mohan.cabbie.modelclasses;


import java.util.ArrayList;

public class model {

    String pickup;
    String via;
    String drop;

   

    public model() {
    }

    public model(String pickup,String via,String drop) {
        this.pickup = pickup;
        this.via = via;
        this.drop = drop;
    }

    public String getPickup() {
        return pickup;
    }

    public void setPickup(String pickup) {
        this.pickup = pickup;
    }

    public String getVia() {
        return via;
    }

    public void setVia(String via) {
        this.via = via;
    }

    public String getDrop() {
        return drop;
    }

    public void setDrop(String drop) {
        this.drop = drop;
    }
}


3) modelDocument class

<pre>package com.example.android.sohan.mohan.cabbie.modelclasses;

import java.util.ArrayList;

public class modelDocument {

    
    public ArrayList<model> journeyorders;

    public void setJourneyorders(ArrayList<model> journeyorders) {
        this.journeyorders = journeyorders;
    }

   

    public modelDocument() {

    }
    
    
    
}


4) RecycleAdapter class

<pre>package com.example.android.sohan.mohan.cabbie.adapters;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.example.android.sohan.mohan.cabbie.R;
import com.example.android.sohan.mohan.cabbie.modelclasses.model;

import java.util.ArrayList;
import java.util.List;

public class RecycleAdapter extends RecyclerView.Adapter<recycleadapter.viewholder>{
   
    ArrayList<model> datalist;
    public RecycleAdapter(ArrayList<model> datalist) {
        super();
        this.datalist=datalist;

    }


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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.t1.setText(datalist.get(position).getPickup());
        holder.t2.setText(datalist.get(position).getVia());
        holder.t3.setText(datalist.get(position).getDrop());
    }

    

   

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

    class ViewHolder extends RecyclerView.ViewHolder {
        TextView t1;
        TextView t2;
        TextView t3;

        public ViewHolder(View itemView) {
            super(itemView);
            t1 = itemView.findViewById(R.id.t6);
            t2 = itemView.findViewById(R.id.t7);
            t3 = itemView.findViewById(R.id.t8);
        }
    }

}