[Firebae] Firebase 사용하기, 익명 로그인

1. dependancy 추가

---

- project단위

buildscript {
  repositories {
    // Check that you have the following line (if not, add it):
    google()  // Google's Maven repository

  }
  dependencies {
    ...
    // Add this line
    classpath 'com.google.gms:google-services:4.3.10'

  }
}

allprojects {
  ...
  repositories {
    // Check that you have the following line (if not, add it):
    google()  // Google's Maven repository

    ...
  }
}

 

- module단위

apply plugin: 'com.google.gms.google-services'


dependencies {
  // Import the Firebase BoM
  implementation platform('com.google.firebase:firebase-bom:29.2.1')


  // Add the dependency for the Firebase SDK for Google Analytics
  // When using the BoM, don't specify versions in Firebase dependencies
  implementation 'com.google.firebase:firebase-analytics-ktx'


  // Add the dependencies for any other desired Firebase products
  // https://firebase.google.com/docs/android/setup#available-libraries
}

 

 

2. 익명 로그인 설정

---

 

 

3. 익명로그인 사용을 위한 의존성 추가

---

- module 수준

  implementation 'com.google.firebase:firebase-auth'

 

 

 

4. 익명로그인 사용

---

아래 구글 문서 참고

https://firebase.google.com/docs/auth/android/anonymous-auth?hl=ko 

Android에서 익명으로 Firebase에 인증  |  Firebase Documentation

 

간단한 예시

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.widget.Button
import android.widget.Toast
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.ktx.auth
import com.google.firebase.ktx.Firebase

class MainActivity : AppCompatActivity() {

    private lateinit var auth: FirebaseAuth

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)


        // ...
        // Initialize Firebase Auth
        auth = Firebase.auth

        val btn = findViewById<Button>(R.id.noEmailLoginBtn)
        btn.setOnClickListener {

            //익명 로그인 사용
            auth.signInAnonymously()
                .addOnCompleteListener(this) { task ->
                    if (task.isSuccessful) {

                        val user = auth.currentUser
                        Log.d("MainActivity", user!!.uid)

                    } else {
                        // If sign in fails, display a message to the user.

                        Toast.makeText(baseContext, "Authentication failed.", Toast.LENGTH_SHORT).show()
                    }
                }

        }
    }
}

앱 실행 후 익명 로그인 시 firebaes에서 확인 가능