How to save the UID of a user on registering the user using firebase Auth

Question

I'm trying to save the UID of a user on registering the user using Firebase Auth.

Here I have already pushed the user UID as the key in the database under that I need to insert the same UID as a data

package com.example.loginregistration;

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

import android.app.DatePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
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;
import com.rengwuxian.materialedittext.MaterialEditText;

import java.text.DateFormat;
import java.util.Calendar;

public class AddEmployee extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {

    MaterialEditText Username, email, password, mobile, dob, job, department;
    RadioButton radio_male,radio_female,radio_admin,radio_user;
    ImageView date;
    Button register;
    TextView LoginBtn;
    FirebaseAuth fAuth;
    FirebaseUser FirebaseUser;
    DatabaseReference reff;
    Employee Employee;
    String currentDateString;
    long maxid=0;
    String user,id;
    Spinner spinner;
    String txtGender = "",txtUserName="", txtRole="";

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


        Username = findViewById(R.id.username);
        email = findViewById(R.id.email);
        password = findViewById(R.id.password);
        //dob = findViewById(R.id.dob);
        job = findViewById(R.id.jobtitle);
        department = findViewById(R.id.department);
        mobile = findViewById(R.id.mobile);

        radio_male = findViewById(R.id.male);
        radio_female = findViewById(R.id.female);
        radio_admin = findViewById(R.id.Admin);
        radio_user = findViewById(R.id.User);

        register = findViewById(R.id.register);
        spinner = findViewById(R.id.spinner);
        //LoginBtn = findViewById(R.id.createText);
        Employee= new Employee();

        date = findViewById(R.id.date);
        date.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                DialogFragment datePicker = new DatePickerFragment();
                datePicker.show(getSupportFragmentManager(), "date picker");
            }
        });

        fAuth = FirebaseAuth.getInstance();

        reff = FirebaseDatabase.getInstance().getReference("Employee");

        reff.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
              // if (dataSnapshot.exists())
                   // user = (dataSnapshot.getKey());
                //Log.e("User", user);
            }

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

            }
        });



        /*if (fAuth.getCurrentUser() != null){
            startActivity(new Intent(getApplicationContext(),AppStartActivity.class));
            finish();
        }*/

        register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String txtUserName = Username.getText().toString();
                String txtEmail = email.getText().toString().trim();
                String txtPassword = password.getText().toString().trim();
                String txtMobile = mobile.getText().toString();
                String txtJob = job.getText().toString().trim();
                String txtDepatment = department.getText().toString();
              //String txtDob = dob.getText().toString().trim();
                String job = spinner.getSelectedItem().toString().trim();

                String id = reff.push().getKey();
                Log.e("id",id);


                if(radio_male.isChecked()){
                    txtGender="Male";
                }

                if(radio_female.isChecked()){
                    txtGender="Female";
                }

                if(radio_admin.isChecked()){
                    txtRole="1";
                }

                if(radio_user.isChecked()){
                    txtRole="0";
                }


                //reff.child(String.valueOf(maxid+1)).setValue(Employee);
               // reff.child(txtUserName).setValue(Employee);

                Toast.makeText(AddEmployee.this,"Data inserted successfully",Toast.LENGTH_LONG).show();


                if (TextUtils.isEmpty(txtEmail)){
                    email.setError("Email is Required.");
                    return;
                }

                if (TextUtils.isEmpty(txtPassword)){
                    password.setError("Password is Required.");
                    return;

                }

                if (password.length() < 6){

                    password.setError("Password must be more than 6 characters.");
                    return;

                }

                fAuth.createUserWithEmailAndPassword(txtEmail,txtPassword).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()){

                            FirebaseUser = fAuth.getCurrentUser();
                            user = FirebaseUser.getUid();
                            //Log.e("id", user);
                            reff.child(user).setValue(Employee);



                            Toast.makeText(AddEmployee.this,"User Created.",Toast.LENGTH_SHORT).show();
                            startActivity(new Intent(getApplicationContext(),AppStartActivity.class));
                        }

                        else{
                            Toast.makeText(AddEmployee.this,"Error ! " + task.getException().getMessage(),Toast.LENGTH_SHORT).show();
                        }

                    }
                });


                //id = user;
                //Log.e("id",id);

                Employee.setEmail(txtEmail);
                Employee.setPassword(txtPassword);
                Employee.setUsername(txtUserName);
                Employee.setMobile(txtMobile);
                Employee.setJob(job);
                Employee.setDepatment(txtDepatment);
                Employee.setDob(currentDateString);
                Employee.setGender(txtGender);
                Employee.setRole(txtRole);
                Employee.setId(id);


            }
        });

    }
    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth){
        Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DAY_OF_MONTH, dayOfMonth);

        currentDateString = DateFormat.getDateInstance(DateFormat.DEFAULT).format(c.getTime());

        TextView textView = (TextView) findViewById(R.id.dob);

        textView.setText(currentDateString);


    }
}

And here is my database structure.

Here I want to save the UID in the database which I couldn't get out of the concrete method of the firebase.

Im able to get the UID but not able to save the data, if I give save data in function inside the oncreate its not getting saved. outside the oncreate im numable to save the UID alone.

Answer 1

You are not setting the UID of User. You are using the Database ID instead.

Please replace the line:

Employee.setId(id)

With this:

Employee.setId(userUID);

Here userUID will be fAuth.getCureentUser().getUID(); Also you need to turn few of your variable to final as you will be using it in another class. Android Studio will let you know about that.

Now it upload User UID :-)

To do that, first move your Employee setters in task.isSuccessful() and then it should work perfectly.