Flutter 앱과 Firebase 연동

allegromoth·2023년 1월 12일
FirebaseandroidflutteriOS
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1. Firebase CLI 설치

https://firebase.google.com/docs/cli?authuser=0&hl=ko#install_the_firebase_cli

firebase-tools

install with npm

node 설치버전 확인 후 전역으로 firebase-tools 설치 

$ node -v 
v17.8.0

$ npm install -g firebase-tools

firebase login

firebase login 을 시도 (비로그인시 브라우저를 통해 인증)

$ firebase login

FlutterFire CLI

install

flutterfire_cli 를 전역으로 설치한 후에 다음 경로를 $PATH 에 등록

$ dart pub global activate flutterfire_cli
$ export PATH="$PATH":"$HOME/.pub-cache/bin"

$ flutterfire -v 
0.2.7

2. flutterfire configure

플러터 앱에서 지원하는 플랫폼 (iOS, Android, Web) 을 선택

$ flutterfire configure

3. Firebase 앱 초기화

firebase_core 플러그인 설치

$ flutter pub add firebase_core

lib/main.dart 파일 수정

import plugin & options

import 'package:firebase_core/firebase_core.dart';
import 'firebase_options.dart';

Firebase 초기화

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  runApp(const MyApp());
}

run

your-flutter-proj $ flutter run

Firebase iOS setup

ios/podfile

주석해제

# Uncomment this line to define a global platform for your project
platform :ios, '11.0'

ios/Flutter/Release.xcconfig

  • 마지막 라인을 추가
#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
#include "Generated.xcconfig"

#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"

pod install

$ cd ios
$ pod install

m1 mac 의 경우 CocoaPods cloud not find compatible versions for pod "Firebase/Firestore" 에러가 나는 경우 다음을 입력 

$ sudo arch -x86_64 gem install ffi
$ arch -x86_64 pod install --repo-update

Firebase Android setup

compileSdkVersion

android/app/build.gradle 파일의 compileSdkVersion 을 31 로 교체 

Warning: The plugin cloud_firestore requires Android SDK version 31.
For more information about build configuration, see https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
Warning: The plugin firebase_auth requires Android SDK version 31.
For more information about build configuration, see https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
Warning: The plugin firebase_core requires Android SDK version 31.
For more information about build configuration, see https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
Warning: The plugin firebase_storage requires Android SDK version 31.
For more information about build configuration, see https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
One or more plugins require a higher Android SDK version.
Fix this issue by adding the following to /Users/allegromoth/Documents/flutter-source/flutter-ui/android/app/build.gradle:
android {
  compileSdkVersion 31
  ...
}

minSdkVersion

cloud_firestore 에 지정된 minSdkVersion 이 19 이기 때문에 android/app/build.gradle 의 minSdkVersion 을 19로 교체

/Users/allegromoth/Documents/flutter-source/flutter-ui/android/app/src/debug/AndroidManifest.xml Error:
	uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:cloud_firestore] /Users/allegromoth/Documents/flutter-source/flutter-ui/build/cloud_firestore/intermediates/library_manifest/debug/AndroidManifest.xml as the library might be using APIs not available in 16
	Suggestion: use a compatible library with a minSdk of at most 16,
		or increase this project's minSdk version to at least 19,
		or use tools:overrideLibrary="io.flutter.plugins.firebase.firestore" to force usage (may lead to runtime failures)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugMainManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:cloud_firestore] /Users/allegromoth/Documents/flutter-source/flutter-ui/build/cloud_firestore/intermediates/library_manifest/debug/AndroidManifest.xml as the library might be using APIs not available in 16
  	Suggestion: use a compatible library with a minSdk of at most 16,
  		or increase this project's minSdk version to at least 19,
  		or use tools:overrideLibrary="io.flutter.plugins.firebase.firestore" to force usage (may lead to runtime failures)

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 58s

┌─ Flutter Fix ─────────────────────────────────────────────────────────────────────────────────┐
│ The plugin cloud_firestore requires a higher Android SDK version.                             │
│ Fix this issue by adding the following to the file                                            │
│ /Users/allegromoth/Documents/flutter-source/flutter-ui/android/app/build.gradle:          │
│ android {                                                                                     │
│   defaultConfig {                                                                             │
│     minSdkVersion 19                                                                          │
│   }                                                                                           │
│ }                                                                                             │
│                                                                                               │
│ Note that your app won't be available to users running Android SDKs below 19.                 │
│ Alternatively, try to find a version of this plugin that supports these lower versions of the │
│ Android SDK.                                                                                  │
│ For more information, see:                                                                    │
│ https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration                 │
└───────────────────────────────────────────────────────────────────────────────────────────────┘
Exception: Gradle task assembleDebug failed with exit code 1

Kotlin Gradle plugin Update

┌─ Flutter Fix ────────────────────────────────────────────────────────────────────────────────┐
│ [!] Your project requires a newer version of the Kotlin Gradle plugin.                       │
│ Find the latest version on https://kotlinlang.org/docs/gradle.html#plugin-and-versions, then │
│ update /Users/allegromoth/Documents/flutter-source/flutter-ui/android/build.gradle:      │
│ ext.kotlin_version = '<latest-version>'                                                      │
└──────────────────────────────────────────────────────────────────────────────────────────────┘
Exception: Gradle task assembleDebug failed with exit code 1

https://kotlinlang.org/ 에 보면 타이틀에 최신버전을 확인가능
android/build.gradle 의 ext.kotlin_version 값을 1.8.0 으로 교체

upgrade Gradle and the Android Gradle plugin.

https://developer.android.com/studio/releases/gradle-plugin#kts

android/build.gradle 파일과
android/gradle/wrapper/gradle-wrapper.properties 파일에서 아래 안내대로 수정

┌─ Flutter Fix ────────────────────────────────────────────────────────────────────────────────────┐
│ [!] Your project needs to upgrade Gradle and the Android Gradle plugin.                          │
│                                                                                                  │
│ To fix this issue, replace the following content:                                                │
│ /Users/allegromoth/Documents/flutter-source/flutter-ui/android/build.gradle:                 │
│     - classpath 'com.android.tools.build:gradle:<current-version>'                               │
│     + classpath 'com.android.tools.build:gradle:7.1.2'                                           │
│ /Users/allegromoth/Documents/flutter-source/flutter-ui/android/gradle/wrapper/gradle-wrapper │
│ .properties:                                                                                     │
│     - https://services.gradle.org/distributions/gradle-<current-version>-all.zip                 │
│     + https://services.gradle.org/distributions/gradle-7.4-all.zip                               │
└──────────────────────────────────────────────────────────────────────────────────────────────────┘
Exception: Gradle task assembleDebug failed with exit code 1

ERROR:D8: Cannot fit requested classes in a single dex file

메서드가 64K개를 초과하는 앱에 관해 멀티덱스 사용 설정한다.
https://developer.android.com/studio/build/multidex

android/app/build.gradle 에 multiDexEnabled = true 추가 

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        ... 
        minSdkVersion 19
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled = true
    }
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