Flutter集成google_mobile_ads后Release模式崩溃问题（Admob相关）

问题 #

在Flutter项目中集成google_mobile_ads: ^6.0.0插件后，Debug和Profile模式运行完全正常，但使用Play商店已存在的自有应用包名打包Release版本时，安装后应用立即崩溃；若使用随机测试包名（如com.something.test）则无崩溃问题。

报错日志 #

FATAL EXCEPTION: main
E/AndroidRuntime(11466): Process: com.ragory.lse, PID: 11466
E/AndroidRuntime(11466): java.lang.VerifyError: Rejecting class com.google.android.gms.internal.ads.JM that attempts to sub-type erroneous class com.google.android.gms.internal.ads.mN (declaration of 'com.google.android.gms.internal.ads.JM' appears in /data/app/~~DddutjzhIYdS_tcJD_fw0w==/com.ragory.lse-EL0YXaJbxpaaDFtCJqlcGw==/base.apk)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.If.s(SourceFile:3)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.bL.<init>(SourceFile:128)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.KL.<init>(Unknown Source:13)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.If.<init>(SourceFile:117)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.Z9.h(SourceFile:324)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.jg.X(SourceFile:86)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.jg.W0(SourceFile:141)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.ab.run(SourceFile:1391)
E/AndroidRuntime(11466):        at android.os.Handler.handleCallback(Handler.java:959)
E/AndroidRuntime(11466):        at android.os.Handler.dispatchMessage(Handler.java:100)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.Wy.a(SourceFile:1)
E/AndroidRuntime(11466):        at N2.L.a(SourceFile:1)
E/AndroidRuntime(11466):        at com.google.android.gms.internal.ads.Wy.dispatchMessage(SourceFile:10)
E/AndroidRuntime(11466):        at android.os.Looper.loopOnce(Looper.java:232)
E/AndroidRuntime(11466):        at android.os.Looper.loop(Looper.java:317)
E/AndroidRuntime(11466):        at android.app.ActivityThread.main(ActivityThread.java:8592)
E/AndroidRuntime(11466):        at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(11466):        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:580)
E/AndroidRuntime(11466):        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:878)
E/AndroidRuntime(11466): Caused by: java.lang.VerifyError: Verifier rejected class com.google.android.gms.internal.ads.mN: void com.google.android.gms.internal.ads.mN.F() failed to verify: void com.google.android.gms.internal.ads.mN.F(): [0xF0] expected to be within a catch-all for an instruction where a monitor is held (declaration of 'com.google.android.gms.internal.ads.mN' appears in /data/app/~~DddutjzhIYdS_tcJD_fw0w==/com.ragory.lse-EL0YXaJbxpaaDFtCJqlcGw==/base.apk)
E/AndroidRuntime(11466):        ... 19 more
E/flutter (12022): [ERROR:flutter/lib/ui/dart_runtime_hooks.cc(38)] Dart Error: Dart_LookupLibrary: library 'xtw' not found.
E/flutter (12022): [ERROR:flutter/shell/common/shell.cc(117)] Dart Error: Dart_LookupLibrary: library 'xtw' not found.
E/flutter (12022): [ERROR:flutter/shell/common/shell.cc(117)] Dart Error: Dart_LookupLibrary: library 'xtw' not found.

相关配置信息 #

settings.gradle

pluginManagement {
    def flutterSdkPath = {
        def properties = new Properties()
        file("local.properties").withInputStream { properties.load(it) }
        def flutterSdkPath = properties.getProperty("flutter.sdk")
        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
        return flutterSdkPath
    }()

    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")

    repositories {
        google()
        mavenCentral()
        gradlePluginPortal()
    }
}

plugins {
    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
    id "com.android.application" version "8.3.0" apply false
    id "org.jetbrains.kotlin.android" version "2.0.20" apply false
    id "com.google.gms.google-services" version "4.3.15" apply false
    id "com.google.firebase.crashlytics" version "2.8.1" apply false

}

include ":app"

app/build.gradle

defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId = "com.example.admob_testing"
        // You can update the following values to match your application needs.
        // For more information, see: https://flutter.dev/to/review-gradle-config.
        minSdk = 23
        targetSdk = flutter.targetSdkVersion
        versionCode = flutter.versionCode
        versionName = flutter.versionName
        multiDexEnabled true
    }


dependencies {
    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.3'
    implementation ("com.android.support:multidex:2.0.1")
   
}

gradle-wrapper.properties

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip

问题原因分析 #

• 签名验证冲突：已在Play商店发布的包名会关联Play应用签名，本地打包使用的签名与Play商店的签名不一致时，Android系统会拒绝验证AdMob相关的内部类字节码，触发VerifyError。测试包名未在Play商店注册，无签名验证冲突，因此可正常运行。
• 混淆规则缺失：Release模式默认开启代码混淆，若未添加google_mobile_ads的专属混淆规则，混淆过程会误删AdMob依赖的关键类/方法，导致类继承关系失效（如JM类无法继承错误状态的mN类）。测试包名的打包配置可能未触发严格混淆，因此无此问题。
• 编译产物与包名不匹配：报错中的Dart_LookupLibrary: library 'xtw' not found说明，Release编译生成的Dart库与当前包名绑定的资源不匹配。已发布包名关联了特定的编译配置或资源文件，本地打包时未同步这些配置，导致运行时无法找到对应Dart库。

内容的提问来源于stack exchange，提问作者Shafi Munshi