Activity not moving to another activty in android studio - android-studio

Question

package com.example.bookapp;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.example.bookapp.databinding.ActivityLoginBinding;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
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.ValueEventListener;
public class LoginActivity extends AppCompatActivity {
private ActivityLoginBinding binding;
private FirebaseAuth firebaseAuth;
private ProgressDialog progressDialog;
private Button BtnLogin;
private EditText TxtEmail;
private EditText TxtPassword;
private TextView singUp;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
firebaseAuth = firebaseAuth.getInstance();
progressDialog = new ProgressDialog(this);
progressDialog.setTitle("Please wait");
progressDialog.setCanceledOnTouchOutside(false);
BtnLogin =(Button) findViewById(R.id.loginBtn);
singUp =(TextView) findViewById(R.id.noAccountTv);
singUp.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view)
{
Intent i = new Intent(LoginActivity.this, RegisterActivity.class);
startActivity(i);
}
});
BtnLogin.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view)
{
validateData();
}
});
}
private String email = "", password = "";
private void validateData() {
TxtEmail =(EditText) findViewById(R.id.emailet);
email =TxtEmail.getText().toString().trim();
TxtPassword = (EditText) findViewById(R.id.passwordet);
password = TxtPassword.getText().toString().trim();
if(!Patterns.EMAIL_ADDRESS.matcher(email).matches())
{
Toast.makeText(this, "Invalid Email Pattern..!", Toast.LENGTH_SHORT).show();
}
else if(TextUtils.isEmpty(password))
{
Toast.makeText(this,"Please enter password",Toast.LENGTH_SHORT).show();
}
else
{
loginUser();
}
}
private void loginUser()
{
progressDialog.setMessage("Logging In");
progressDialog.show();
firebaseAuth.signInWithEmailAndPassword(email,password)
.addOnSuccessListener(new OnSuccessListener<AuthResult>() {
#Override
public void onSuccess(AuthResult authResult) {
checkUser();
}
})
.addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure( Exception e) {
progressDialog.dismiss();
Toast.makeText(LoginActivity.this,""+e.getMessage(),Toast.LENGTH_SHORT).show();
}
});
}
private void checkUser()
{
progressDialog.setMessage("Checking User..");
FirebaseUser firebaseUser = firebaseAuth.getCurrentUser();
DatabaseReference ref = FirebaseDatabase.getInstance().getReference("Users");
ref.child(firebaseUser.getUid())
.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot snapshot)
{
progressDialog.dismiss();
String userType = ""+snapshot.child("userType").getValue();
if(userType.equals("user"))
{
Intent i = new Intent(LoginActivity.this,DashboardUserActivity.class);
startActivity(i);
finish();
}
else if(userType.equals("admin"))
{
Intent i = new Intent(LoginActivity.this,DashboardAdminActivity.class);
startActivity(i);
finish();
}
}
#Override
public void onCancelled(DatabaseError error) {
}
});
}
}
Application is unable to move to the DashboardAdminActivity/DashboardUserActivity while progressbar is showing & email and password validation is also working, but it's not going to the next activities according to the "usertype".
I also tried intent another way, but it's not working, if you guys can find any error/correction in my code, it would be appreciated.