Firebase 无法处理异常 PlatformException（null-error，主机平台针对非 null 返回值返回 null 值。, null, null）

Question

当我使用 firebase 制作用户注册和登录应用程序时，但我无法正常运行，它会出现如下错误。

E/flutter ( 6840): #0      FirebaseCoreHostApi.optionsFromResource (package:firebase_core_platform_interface/src/pigeon/messages.pigeon.dart:248:7)
E/flutter ( 6840): <asynchronous suspension>
E/flutter ( 6840): #1      MethodChannelFirebase.initializeApp (package:firebase_core_platform_interface/src/method_channel/method_channel_firebase.dart:89:25)
E/flutter ( 6840): <asynchronous suspension>
E/flutter ( 6840): #2      Firebase.initializeApp (package:firebase_core/src/firebase.dart:43:31)
E/flutter ( 6840): <asynchronous suspension>
E/flutter ( 6840): #3      main (package:firebaseapp/main.dart:6:3)
E/flutter ( 6840): <asynchronous suspension>
E/flutter ( 6840): 

看看我的build.gradle(app)

    plugins {
        id "com.android.application"
        id "kotlin-android"
        id "dev.flutter.flutter-gradle-plugin"
        id("com.google.gms.google-services")
    }
    
    def localProperties = new Properties()
    def localPropertiesFile = rootProject.file('local.properties')
    if (localPropertiesFile.exists()) {
        localPropertiesFile.withReader('UTF-8') { reader ->
            localProperties.load(reader)
        }
    }
    
    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.google.gms.google-services'
    android {
        namespace "com.example.firebaseapp"
        compileSdkVersion flutter.compileSdkVersion
        ndkVersion 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 "com.example.firebaseapp"
            // You can update the following values to match your application needs.
            // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
            minSdkVersion 22
            targetSdkVersion flutter.targetSdkVersion
            versionCode flutterVersionCode.toInteger()
            versionName flutterVersionName
            multiDexEnabled 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 {}

下面的代码是我的build.gradle(android)

buildscript {
    ext.kotlin_version = '1.7.10'
    repositories {
        google()
        mavenCentral()
    }


    dependencies {
        classpath 'com.android.tools.build:gradle:7.3.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.13'
    }
}


allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

我还在这里添加了我的 main.dart，

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(const MyApp());
}

这是我的 pubspec.yaml，

我尝试了这个问题的所有答案

Answer 1

请检查您的系统（MAC 和 Windows）的 SHA 密钥是否已添加到 Firebase 上的此项目中，因为有时会出现有关 SHA 密钥的错误。