안드로이드 FireBase 이메일로 회원가입하기 소스코드

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Firebase에 들어가서 이메일 사용 설정은 이미 했다고 가정.

 이메일 로그인 사용 설정.

 

activity_sign_up.xml 코드

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:gravity="center"
        android:text="회원가입"
        android:textSize="24sp"
        android:textStyle="bold" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:padding="10dp">

        <EditText
            android:id="@+id/emailEditText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:ems="10"
            android:hint="이메일"
            android:inputType="textEmailAddress" />

        <EditText
            android:id="@+id/passwordEditText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:ems="10"
            android:hint="비밀번호"
            android:inputType="textPassword" />

        <EditText
            android:id="@+id/passwordCheckEditText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:ems="10"
            android:hint="비밀번호 확인"
            android:inputType="textPassword" />

        <Button
            android:id="@+id/signUpButton"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="회원가입" />



    </LinearLayout>

</LinearLayout>

SignUpActivity.java 코드

package com.onestation.bookshare;

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

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
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;

public class SignUpActivity extends AppCompatActivity {

    private static final String TAG = "SignUpActivity";
    private FirebaseAuth mAuth;
    private Button sign_up;

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

        mAuth = FirebaseAuth.getInstance();

        sign_up = findViewById(R.id.signUpButton);
        sign_up.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                signUp();
            }
        });
    }

    // When initializing your Activity, check to see if the user is currently signed in.
    @Override
    public void onStart() {
        super.onStart();
        // Check if user is signed in (non-null) and update UI accordingly.
        FirebaseUser currentUser = mAuth.getCurrentUser();
    }


    private void signUp() {
        // 이메일
        EditText emailEditText = findViewById(R.id.emailEditText);
        String email = emailEditText.getText().toString();
        // 비밀번호
        EditText passwordEditText = findViewById(R.id.passwordEditText);
        String password = passwordEditText.getText().toString();

        mAuth.createUserWithEmailAndPassword(email, password)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            // Sign in success, update UI with the signed-in user's information
                            Log.d(TAG, "createUserWithEmail:success");
                            FirebaseUser user = mAuth.getCurrentUser();
                            Intent intent = new Intent(SignUpActivity.this, MainActivity.class);
                            startActivity(intent);
                            Toast.makeText(SignUpActivity.this, "등록 완료", Toast.LENGTH_SHORT).show();
                            finish();
                        } else {
                            // If sign in fails, display a message to the user.
                            Log.w(TAG, "createUserWithEmail:failure", task.getException());
                            Toast.makeText(SignUpActivity.this, "등록 에러", Toast.LENGTH_SHORT).show();
                            return;
                        }
                    }
                });
    }

    Intent intent = getIntent();

}

 

이 코드는 회원가입시 이메일 사용자 인증같은건 안 됨.

helloworld@naveeeerrrr.comcomcom 이런식으로 이상한 메일로 해도 가입 됨.

그래도 Firebase 관리로 아이디와 비밀번호 값이 넘어가긴 합니다.