Register in Android

 Xml:-

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="20dp"
    tools:context=".Register">
<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/regname"
    android:hint="Enter Name"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Email"
        android:id="@+id/regemil"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/regpass"
        android:hint="Enter Password"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="Register"
        android:id="@+id/register"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SingIn"
        android:id="@+id/gosignin"
        android:layout_gravity="center"
        android:textSize="20sp"/>

</LinearLayout>

Java :-

package com.niranjan.cloudfirebase;

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

import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
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.database.FirebaseDatabase;

public class Register extends AppCompatActivity {
EditText name,regemail,regpassword;
Button registerbtn;
TextView gotosignin;
FirebaseDatabase firebaseDatabase;
FirebaseAuth auth;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        firebaseDatabase=FirebaseDatabase.getInstance();
        auth=FirebaseAuth.getInstance();
        name=findViewById(R.id.regname);
        regemail=findViewById(R.id.regemil);
        regpassword=findViewById(R.id.regpass);
        registerbtn=findViewById(R.id.register);
        gotosignin=findViewById(R.id.gosignin);
        gotosignin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Register.this,Login.class);
                startActivity(intent);
            }
        });
        registerbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                createUser();
            }
        });
    }

    private void createUser() {
        String username = name.getText().toString();
        String useremai = regemail.getText().toString();
        String userpass = regpassword.getText().toString();
        if (TextUtils.isEmpty(username))
        {
            Toast.makeText(this, "Name is empty", Toast.LENGTH_SHORT).show();
        }
        if (TextUtils.isEmpty(useremai))
        {
            Toast.makeText(this, "Email is empty", Toast.LENGTH_SHORT).show();
        }
        if (TextUtils.isEmpty(userpass))
        {
            Toast.makeText(this, "Password is empty", Toast.LENGTH_SHORT).show();
        }
auth.createUserWithEmailAndPassword(useremai,userpass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
    @Override
    public void onComplete(@NonNull Task<AuthResult> task) {
        if (task.isSuccessful()){
            Usermodel usermodel = new Usermodel(username,useremai,userpass);
            String id = task.getResult().getUser().getUid();
            firebaseDatabase.getReference().child("Users").child(id).setValue(usermodel);
            Toast.makeText(Register.this, "Register Sucessfull", Toast.LENGTH_SHORT).show();
            startActivity(new Intent(Register.this,Login.class));
            finish();
        }else {
            Toast.makeText(Register.this, "Failed", Toast.LENGTH_SHORT).show();
        }
    }
});
    }
}



User mode:- 

package com.niranjan.cloudfirebase;

public class Usermodel {
    String username,useremai,userpass;

    public Usermodel() {
    }

    public Usermodel(String username, String useremai, String userpass) {
        this.username = username;
        this.useremai = useremai;
        this.userpass = userpass;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getUseremai() {
        return useremai;
    }

    public void setUseremai(String useremai) {
        this.useremai = useremai;
    }

    public String getUserpass() {
        return userpass;
    }

    public void setUserpass(String userpass) {
        this.userpass = userpass;
    }
}