Same Instance of an arrayAdapter in Two ListView doesnot work

Question

I have two fragments in my Activity. Both of these fragments have unique listView, these fragments have methods that get values from database, One fragment shows used data and the other shows added data so I use the same Model. Also these fragments use two diffrence instance of the same arrayAdapter class which extends ArrayAdapter<>.

Class FragmentPartTaken extends Fragment

     //Instance Variables
     ListView listPartTaken;
     AdapterPartsIntakenOutMinimized adapter;
     private ArrayList<ModelPartIntakenOuttake> modelPartOuttakes;

     //onCreateView     
     listPartTaken = view.findViewById(R.id.list_part_taken);
     modelPartOuttakes = new ArrayList<>();
     adapter = new AdapterPartsIntakenOutMinimized(modelPartOuttakes,getContext());

Class FragmentPartAdded extends Fragment

    //Instance Variables
    ListView listPartAdded;
    AdapterPartsIntakenOutMinimized adapter;
    private ArrayList<ModelPartIntakenOuttake> modelPartAdded;

    //onCreateView
    listPartAdded = view.findViewById(R.id.list_part_added);
    modelPartAdded = new ArrayList<>();
    adapter = new AdapterPartsIntakenOutMinimized(modelPartAdded,getContext());

When the Activity is Launched, the list in the first Fragment selected(Displayed) is the one that is populated with data, and the other list is left blanks. If I change the order of position of these Fragments it does the same, the list in the first fragment get populated but not the second.

The arrayAdapter Override a single public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {} method. My question is do I need to have each Fragment with its own Adapter class and Model. So as all can be populated at once when the activity is launched.

Edit:

public class AdapterPartsIntakenOut extends ArrayAdapter<ModelPartIntakenOuttake> {

private ArrayList<ModelPartIntakenOuttake> dataSet;
Context mContext;

public AdapterPartsIntakenOut(ArrayList<ModelPartIntakenOuttake> data, Context context) {
    super(context, R.layout.raw_intake_outake_parts, data);
    this.dataSet = data;
    this.mContext=context;
}

private static class ViewHolder {
    TextView textAction;
    TextView textDate;
}

@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    ModelPartIntakenOuttake modelPartIntakenOuttake = getItem(position);
    AdapterPartsIntakenOut.ViewHolder viewHolder; // view lookup cache stored in tag

    final View result;
    if (convertView == null) {
        viewHolder = new AdapterPartsIntakenOut.ViewHolder();
        LayoutInflater inflater = LayoutInflater.from(getContext());
        convertView = inflater.inflate(R.layout.raw_intake_outake_parts, parent, false);
        viewHolder.textAction = (TextView) convertView.findViewById(R.id.txt_action_intake_outtake);
        viewHolder.textDate = convertView.findViewById(R.id.txt_date_intake_outtake);
        result=convertView;
        convertView.setTag(viewHolder);
    } else {
        viewHolder = (AdapterPartsIntakenOut.ViewHolder) convertView.getTag();
        result=convertView;
    }
    viewHolder.textAction.setText(modelPartIntakenOuttake.getActionType());
  viewHolder.textDate.setText(modelPartIntakenOuttake.getOnDate());
    return convertView;
}
}

Edit: I am using volley library to populate the adapters in both fragment

  private void getPartAdded(){
    getActivity().runOnUiThread(mRunnable);
    String partsTakenURL = "....";
    RequestQueue requestQueue = Volley.newRequestQueue(getContext());
    JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, partsTakenURL, null,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    for (int i = 0; i < response.length(); i++) {
                        try { 
                            String actionType = response.getJSONObject(i).getString("action_type");
                            String onDate = response.getJSONObject(i).getString("on_date");
                            modelPartAdded.add(new ModelPartIntakenOuttake(actionType,onDate));
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                    adapter.notifyDataSetChanged();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });

    requestQueue.add(jsonArrayRequest);
    listPartAdded.setAdapter(adapter);
}

Runnable mRunnable = new Runnable() {
    public void run() {
        modelPartAdded.clear();
        adapter.notifyDataSetChanged();

    }

Also on another class

  private void getPartOutTaken() {
   getActivity().runOnUiThread(mRunnable);
    String partsTakenURL = "...";
    RequestQueue requestQueue = Volley.newRequestQueue(getContext());
    JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, partsTakenURL, null,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    for (int i = 0; i < response.length(); i++) {
                        try {
                            String actionType = response.getJSONObject(i).getString("action_type");                   
                            String onDate = response.getJSONObject(i).getString("on_date");
                            modelPartOuttakes.add(new ModelPartIntakenOuttake(actionType,onDate));
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                    adapter.notifyDataSetChanged();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });

    requestQueue.add(jsonArrayRequest);
    listPartTaken.setAdapter(adapter);
}

Runnable mRunnable = new Runnable() {
    public void run() {
        modelPartOuttakes.clear();
        adapter.notifyDataSetChanged();
    }
};;

Answer 1

You can use the same adapter and model class again and again. You are probably doing something wrong while populating your array lists.