为 Flutter 设置 Firebase

Question

I been settling up the project on Firebase. The app has been set up for iOS and Android. It works fine for Flutter Run but it doesn't connect to Firebase

The code in Main.dart is as followed

import 'package:flutter/material.dart';import 'package:footballcrazyquiz/routes.dart';import 'package:footballcrazyquiz/theme.dart';import 'package:firebase_core/firebase_core.dart';import 'package:provider/provider.dart';import 'package:footballcrazyquiz/shared/shared.dart';import 'package:footballcrazyquiz/services/services.dart';

void main() {WidgetsFlutterBinding.ensureInitialized();runApp(const App());}

class App extends StatefulWidget {const App({super.key});

@overrideState<App> createState() => _AppState();}class _AppState extends State<App> {final Future<FirebaseApp> _initialization = Firebase.initializeApp();

@overrideWidget build(BuildContext context) {return FutureBuilder(// Initialize FlutterFire:future: _initialization,builder: (context, snapshot) {// Check for errorsif (snapshot.hasError) {

    }

    // Once complete, show your application
    if (snapshot.connectionState == ConnectionState.done) {
     return StreamProvider(
        create: (_) => FirestoreService().streamReport(),
        catchError: (_, err) => Report(),
        initialData: Report(),
        child: MaterialApp(
          debugShowCheckedModeBanner: true,
          routes: appRoutes,
          theme: appTheme
        ),
      );
    }

    // Otherwise, show something whilst waiting for initialization to complete
    return const MaterialApp(home: LoadingScreen());
  },
);

}}

I'm also not able to generate Android Signing In report in terminal, which I need for SHA 1. Exception is in Android/app/build.gradle line 28 and that's as followed

def localProperties = new Properties()def localPropertiesFile = rootProject.file('local.properties')if (localPropertiesFile.exists()) {localPropertiesFile.withReader('UTF-8') { reader ->localProperties.load(reader)}}

def flutterRoot = localProperties.getProperty('flutter.sdk')if (flutterRoot == null) {throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')if (flutterVersionCode == null) {flutterVersionCode = '1'}

def flutterVersionName = localProperties.getProperty('flutter.versionName')if (flutterVersionName == null) {flutterVersionName = '1.0'}

apply plugin: 'com.android.application'apply plugin: 'kotlin-android'apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {compileSdkVersion flutter.compileSdkVersionndkVersion flutter.ndkVersion

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

kotlinOptions {
    jvmTarget = '1.8'
}

sourceSets {
    main.java.srcDirs += 'src/main/kotlin'
}

defaultConfig {
    // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
    applicationId "io.eddiegamble.footballcrazyquiz"
    minSdkVersion 19
    targetSdkVersion 31.0.1
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
    multidex true
    
}

buildTypes {
    release {
        // TODO: Add your own signing config for the release build.
        // Signing with the debug keys for now, so `flutter run --release` works.
        signingConfig signingConfigs.debug
    }
}

}

flutter {source '../..'}

dependencies {implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"implementation 'com.android.support:multidex:1.0.3'implementation platform('com.google.firebase:firebase-bom:31.1.0')implementation 'com.google.firebase:firebase-analytics'}apply plugin: 'com.google.gms.google-services'

Thank you for reading

Answer 1

Try the following:

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  runApp(const MyApp());
}