Firebase and Android Studio

[dran2023]

Please help me, I don't know what's wrong with this code. I follow the tutorial on youtube and check the code several times but I don't know why when the profile activity appears to be blank.

note : i already added this to manifest
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>

here's the code:

package com.example.javaguru.Activities;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.example.javaguru.R;
import com.example.javaguru.databinding.ActivityProfileBinding;
import com.example.javaguru.databinding.ActivityQuestionBinding;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;

public class ProfileActivity extends AppCompatActivity {
    TextView profileName, profileEmail, profileUsername, profilePassword;
    TextView titleName, titleUsername;
    Button editProfile;
    ActivityProfileBinding binding;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_profile);
        getSupportActionBar().hide();

        profileName = findViewById(R.id.profileName);
        profileEmail = findViewById(R.id.profileEmail);
        profileUsername = findViewById(R.id.profileUsername);
        profilePassword = findViewById(R.id.profilePassword);
        titleName = findViewById(R.id.titleName);
        titleUsername = findViewById(R.id.titleUsername);

        showUserData();
    }
    public void showUserData(){
        Intent intent = getIntent();

        String nameUser = intent.getStringExtra("name");
        String emailUser = intent.getStringExtra("email");
        String usernameUser = intent.getStringExtra("username");
        String passwordUser = intent.getStringExtra("password");

        titleName.setText(nameUser);
        titleUsername.setText(usernameUser);
        profileName.setText(nameUser);
        profileEmail.setText(emailUser);
        profileUsername.setText(usernameUser);
        profilePassword.setText(passwordUser);
    }
}