package com.example.ecommerce;

   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.view.View;
  import android.widget.*;

 import com.google.android.gms.tasks.OnCompleteListener;
 import com.google.android.gms.tasks.Task;
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;

   import java.util.HashMap;

  public class register extends AppCompatActivity {

     EditText inputname, password, Phone ;
    Button createaccount;
    ProgressDialog loadingbar;
    FirebaseDatabase database;
    DatabaseReference ref;
      User user ;



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

      inputname = findViewById(R.id.username);
      password = findViewById(R.id.reg_password);
      Phone = findViewById(R.id.reg_phone_number);
      createaccount = findViewById(R.id.create_account);
      // loadingbar=new ProgressDialog(this);
       ref = database.getReference("User");
      user = new User();

}

public void getValues(){
    user.setName(inputname.getText().toString());
    user.setPhone(Phone.getText().toString());
   user.setPassword(password.getText().toString());
}
 public void btn  (View view)
{
   ref.addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

        getValues();
        ref.child("user02").setValue(user);
        Toast.makeText(register.this,"Data Inserted",Toast.LENGTH_LONG).show();
    }

    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {

    }
});

}


 User class :

package com.example.ecommerce;

public class User {


  private String Name;
  private String Phone;
  private String Password;

public User() {

}

public User(String name, String phone, String password) {
    Name = name;
    Phone = phone;
    Password = password;
}



public String getName() {
    return Name;
}

public void setName(String name) {
    Name = name;
}

public String getPhone() {
    return Phone;
}

public void setPhone(String phone) {
    Phone = phone;
}

public String getPassword() {
    return Password;
}

public void setPassword(String password) {
    Password = password;
}