Cara Membuat Sign Up Register Java Android Studio Simple Programmatically

 

Syarat :

Sudah Setting Tools Firebase di android studionya

 

Javanya 

package com.ranairu.creation;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
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;

public class Register extends AppCompatActivity {
    private FirebaseAuth mAuth;
    private EditText email, password;
    private Button btnRegister;
    private TextView textLogin;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ini_register);
        mAuth = FirebaseAuth.getInstance();
        email = findViewById(R.id.register_email);
        password = findViewById(R.id.register_password);
        btnRegister  = findViewById(R.id.register);
        textLogin = findViewById(R.id.text_login);

        btnRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Register();
            }
        });

        textLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(Register.this, Login.class));
            }
        });

    }

    private void Register()
    {
        String user = email.getText().toString().trim();
        String pass = password.getText().toString().trim();
        if(user.isEmpty())
        {
            email.setError("Email can not be empty");
        }
        if(pass.isEmpty())
        {
            password.setError("Password can not be empty");
        }
        else
        {
            mAuth.createUserWithEmailAndPassword(user, pass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if(task.isSuccessful())
                    {
                        Toast.makeText(Register.this, "User registered successfully", Toast.LENGTH_SHORT).show();
                        startActivity(new Intent(Register.this, MainActivity.class));
                    }
                    else
                    {
                        Toast.makeText(Register.this, "Registration Failed"+task.getException().getMessage(), Toast.LENGTH_SHORT).show();
                    }

                }
            });
        }
    }
}

XML nya

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context=".Register"
    android:layout_margin="10dp">

    <TextView
        android:id="@+id/text_register"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Register Here"
        android:textSize="20dp"
        android:layout_marginBottom="20dp"/>

    <EditText
        android:id="@+id/register_email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="email"
        android:layout_below="@+id/text_register"
        android:layout_marginBottom="20dp"
        />

    <EditText
        android:id="@+id/register_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="password"
        android:layout_below="@+id/register_email"
        android:layout_marginBottom="20dp"
        />

    <Button
        android:id="@+id/register"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/register_password"
        android:text="Register"
        android:layout_marginBottom="20dp"/>

    <TextView
        android:id="@+id/text_login"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/register"
        android:text="Existing User Login"
        android:layout_marginBottom="20dp"
        android:textAlignment="center"/>

</RelativeLayout>