Flutter集成Firebase后Android端出现AbstractMethodError崩溃求解决

问题概述 #

在Flutter应用中集成Firebase Crashlytics和Analytics并发布至Play Store后，Android设备出现大量崩溃，崩溃类型为java.lang.AbstractMethodError，错误溯源至Firebase Installations相关服务代码。

崩溃日志 #

Fatal Exception: java.lang.AbstractMethodError: abstract method "N.f N.f.d1(int)"
       at com.google.firebase.installations.remote.FirebaseInstallationServiceClient.readGenerateAuthTokenResponse(FirebaseInstallationServiceClient.java:90)
       at com.google.firebase.installations.remote.FirebaseInstallationServiceClient.b(FirebaseInstallationServiceClient.java:96)
       at com.google.firebase.installations.FirebaseInstallations.fetchAuthTokenFromServer(FirebaseInstallations.java:29)
       at com.google.firebase.installations.FirebaseInstallations.doNetworkCallIfNecessary(FirebaseInstallations.java:110)
       at com.google.firebase.installations.FirebaseInstallations.lambda$doRegistrationOrRefresh$3(FirebaseInstallations.java:110)
       at com.google.firebase.concurrent.SequentialExecutor$1.run(SequentialExecutor.java:2)
       at com.google.firebase.concurrent.SequentialExecutor$QueueWorker.workOnQueue(SequentialExecutor.java:84)
       at com.google.firebase.concurrent.SequentialExecutor$QueueWorker.run(SequentialExecutor.java)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
       at com.google.firebase.concurrent.CustomThreadFactory.lambda$newThread$0(CustomThreadFactory.java:13)
       at java.lang.Thread.run(Thread.java:923)

当前配置信息 #

android/build.gradle #

dependencies {
        classpath 'com.android.tools.build:gradle:7.4.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.4.0'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.9.9'
    }

android/app/build.gradle（已包含google-services.json） #

dependencies {
    implementation 'com.google.android.gms:play-services-ads:22.4.0'
    implementation 'com.google.firebase:firebase-analytics:21.3.0'
    implementation 'com.google.firebase:firebase-core:21.1.1'
    implementation 'com.google.android.play:review:2.0.1'
    implementation 'com.android.support:multidex:1.0.3'
}
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'

pubspec.yaml相关依赖 #

firebase_core: ^2.15.1
  firebase_crashlytics: ^3.3.5

解决方案 #

1. 统一Firebase依赖版本，移除冗余依赖 #

• 移除firebase-core依赖：当前firebase-analytics已包含核心功能，无需单独引入firebase-core。
• 强制指定firebase-installations版本，确保与其他Firebase库兼容：在android/app/build.gradle的dependencies中添加：

  implementation 'com.google.firebase:firebase-installations:17.0.0'
  

2. 更新Gradle插件版本 #

将Google Services和Crashlytics Gradle插件更新至兼容的稳定版本，修改android/build.gradle：

dependencies {
    classpath 'com.android.tools.build:gradle:7.4.2'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    classpath 'com.google.gms:google-services:4.4.1'
    classpath 'com.google.firebase:firebase-crashlytics-gradle:3.0.2'
}

3. 更新Flutter端Firebase依赖 #

将pubspec.yaml中的Firebase依赖更新至最新稳定版，确保与原生依赖版本匹配：

firebase_core: ^2.17.0
firebase_crashlytics: ^3.4.0

4. 清理缓存并重新构建 #

执行以下命令清理Gradle缓存，然后重新构建项目：

./gradlew clean
flutter build appbundle

问题原因 #

该AbstractMethodError源于Firebase Installations库与其他Firebase组件版本不兼容，导致方法签名不匹配。通过统一所有Firebase相关依赖版本、更新Gradle插件，可以解决这类兼容性冲突，避免崩溃发生。

内容的提问来源于stack exchange，提问作者Andreas Hadjimamas