[Android/Kotlin] Firebase Authentication 로그인 성공!

안드로이드 인스타그램 클론 코딩 중.

 

1. Firebase 연동 완료

2. LoginActivity.kt에 Firebase Email 및 Password 처리 로직 작성

package com.hs.howlstagram_f1

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.FirebaseUser
import com.google.firebase.auth.*
import kotlinx.android.synthetic.main.activity_login.*

class LoginActivity : AppCompatActivity() {
    var auth : FirebaseAuth? = null
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_login)
        auth = FirebaseAuth.getInstance()
        email_login_button.setOnClickListener {
            signinAndSignup()
        }
    }
    fun signinAndSignup() {
        auth?.createUserWithEmailAndPassword(email_edittext.text.toString(),password_edittext.text.toString())
            ?.addOnCompleteListener{
                task ->
                    if(task.isSuccessful){
                        //Creating a user account
                        moveMainPage(task.result?.user)
                    }else if(task.exception?.message.isNullOrEmpty()){
                        //Show the error message
                        Toast.makeText(this,task.exception?.message,Toast.LENGTH_LONG).show()
                    }else{
                        //Login if you have account
                        signinEmail()
                    }
        }
    }
    fun signinEmail(){
        auth?.signInWithEmailAndPassword(email_edittext.text.toString(),password_edittext.text.toString())
            ?.addOnCompleteListener {
                task ->
                    if(task.isSuccessful){
                        //Login
                        moveMainPage(task.result?.user)
                    }else{
                        //Show the error message
                        Toast.makeText(this,task.exception?.message,Toast.LENGTH_LONG).show()
                    }
            }
    }
    fun moveMainPage(user:FirebaseUser?){
        if(user != null){
            startActivity(Intent(this,MainActivity::class.java))
        }
    }
}

 

Layout은 이렇게

<?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=".LoginActivity">

    <ImageView
        android:id="@+id/image_logo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/signin_layout"
        android:layout_alignParentTop="true"
        android:src="@drawable/logo_title" />

    <LinearLayout
        android:id="@+id/signin_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@id/signin_layout"
        android:layout_alignParentBottom="true"
        android:orientation="vertical">

        <com.google.android.material.textfield.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp">

            <EditText
                android:id="@+id/email_edittext"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Email" />

        </com.google.android.material.textfield.TextInputLayout>

        <com.google.android.material.textfield.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp">

            <EditText
                android:id="@+id/password_edittext"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="@string/password" />

        </com.google.android.material.textfield.TextInputLayout>

        <Button
            android:id="@+id/email_login_button"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="20dp"
            android:layout_marginTop="15dp"
            android:layout_marginRight="20dp"
            android:layout_marginBottom="35dp"
            android:text="@string/signin_email"
            android:theme="@style/ButtonStyle" />

        <Button
            android:id="@string/signin_facebook"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="20dp"
            android:layout_marginTop="15dp"
            android:layout_marginRight="20dp"
            android:layout_marginBottom="5dp"
            android:background="@drawable/btn_signin_facebook"
            android:text="@string/signin_facebook"
            android:textColor="@color/colorWhite" />

        <Button
            android:id="@string/signin_google"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="20dp"
            android:layout_marginTop="15dp"
            android:layout_marginRight="20dp"
            android:layout_marginBottom="80dp"
            android:background="@drawable/btn_signin_google"
            android:text="@string/signin_google"
            android:textColor="@color/colorWhite"
            android:theme="@style/ButtonStyle" />

    </LinearLayout>

</RelativeLayout>

 

로그인 전

 

Email 버튼으로 로그인 후

 

Firebase Authentication History 확인

 

 

아.. 별거 아닌데

왜 이리 삽질을 했지 ㅡㅡ...ㅠ