DialogBox java class

package com.example.cse332mainproject;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatDialogFragment;

public class DialogBox extends AppCompatDialogFragment{

    private EditText editTextUsername;
    private EditText editTextPassword;
    private DialogBoxListener listener;



    @NonNull
    @org.jetbrains.annotations.NotNull
    @Override
    public Dialog onCreateDialog(@Nullable @org.jetbrains.annotations.Nullable Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        LayoutInflater inflater = getActivity().getLayoutInflater();
        View view = inflater.inflate(R.layout.dialoglayout, null);
        builder.setView(view)
                .setTitle("Add Recipient")
                .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {

                    }
                })
                .setPositiveButton("Okay", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        String username = editTextUsername.getText().toString();
                        String password = editTextPassword.getText().toString();
                        listener.applyTexts(username, password);


                    }
                });

         editTextUsername = view.findViewById(R.id.edit_username);
         editTextPassword = view.findViewById(R.id.editPassword);


        return builder.create();


    }

    @Override
    public void onAttach(@NonNull @org.jetbrains.annotations.NotNull Context context) {
        super.onAttach(context);
        try {
            listener = (DialogBoxListener) context;
        } catch (ClassCastException e) {
            throw new ClassCastException(context.toString() + "Must implement DialogBox Listener");
        }

    }

    public interface DialogBoxListener
    {
        void applyTexts(String username, String password);
    }
}