我无法在TextView中显示来自Firebase实时数据库的数据

Question

我正在尝试为一个活动构建一个票务预订应用程序，我设法完成了注册和登录部分。登录后，用户配置文件会显示出来，其中包含一些关于姓名、年龄、电子邮件等的文本视图。我想从实时数据库中读取数据并将其放入文本视图中。我不知道问题出在哪里，但文本视图不会显示数据。

用户配置文件类

public class ProfilUser extends AppCompatActivity {

    private FirebaseUser user;
    private DatabaseReference referinta;

    private String userID;

    private Button delogare;

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

        delogare = (Button) findViewById(R.id.delogare);

        delogare.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                FirebaseAuth.getInstance().signOut();
                startActivity(new Intent(ProfilUser.this,MainActivity.class));
            }
        });

        user = FirebaseAuth.getInstance().getCurrentUser();;
        userID = user.getUid();
        referinta = FirebaseDatabase.getInstance("https://rezervarebileteveniment-default-rtdb.europe-west1.firebasedatabase.app").getReference("Users").child(userID);

         TextView bunVenitTextView = (TextView) findViewById(R.id.bunVenit);
         TextView numeTextView = (TextView) findViewById(R.id.getNume);
         TextView prenumeTextView = (TextView) findViewById(R.id.getPrenume);
         TextView varstaTextView = (TextView)  findViewById(R.id.getVarsta);
         TextView emailTextView = (TextView) findViewById(R.id.getAdresaEmail);

         referinta.child(userID).addListenerForSingleValueEvent(new ValueEventListener() {
             @Override
             public void onDataChange(@NonNull DataSnapshot snapshot) {
                 User profilUser = snapshot.getValue(User.class);

                 if(profilUser != null){
                    String nume = profilUser.nume;
                    String prenume = profilUser.prenume;
                    String email = profilUser.email;
                    String varsta = profilUser.varsta;

                    bunVenitTextView.setText("Buna ziua, "+nume + " "+prenume +"!");
                    numeTextView.setText(nume);
                    prenumeTextView.setText(prenume);
                    emailTextView.setText(email);
                    varstaTextView.setText(varsta);
                 }
             }

             @Override
             public void onCancelled(@NonNull DatabaseError error) {
                 Toast.makeText(ProfilUser.this,"Ceva nu a mers bine!", Toast.LENGTH_LONG).show();
             }
         });
    }
}

用户类

package oct.alx.rezervarebileteveniment;

public class User {

    public String nume, prenume , varsta, email;

    public User(){

    }

    public User(String nume, String prenume, String varsta, String email){
        this.nume = nume;
        this.prenume = prenume;
        this.varsta = varsta;
        this.email = email;
    }

    public String getNume(){
        return nume;
    }
    public void setNume(String nume){
        this.nume = nume;

    }

    public String getPrenume() {
        return prenume;
    }
    public void setPrenume(String prenume) {
        this.prenume = prenume;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getVarsta() {
        return varsta;
    }

    public void setVarsta(String varsta) {
        this.varsta = varsta;
    }
}