Android 6和5上的Firebase InApp消息崩溃

仅在Android 6和Android 5上，我的应用程序因此错误在开始时崩溃：

io.reactivex.exceptions.UndeliverableException: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/common/base/CharMatcher;
        at io.reactivex.plugins.RxJavaPlugins.onError(RxJavaPlugins.java:367)
        at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:69)
        at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
        at java.lang.Thread.run(Thread.java:818)
     Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/common/base/CharMatcher;
        at com.google.common.base.Splitter.on(Splitter.java:125)
        at io.grpc.internal.GrpcUtil.<clinit>(GrpcUtil.java:203)
        at io.grpc.internal.AbstractManagedChannelImplBuilder.<clinit>(AbstractManagedChannelImplBuilder.java:84)
        at io.grpc.okhttp.OkHttpChannelProvider.builderForTarget(OkHttpChannelProvider.java:48)
        at io.grpc.okhttp.OkHttpChannelProvider.builderForTarget(OkHttpChannelProvider.java:27)
        at io.grpc.ManagedChannelBuilder.forTarget(ManagedChannelBuilder.java:73)
        at com.google.firebase.inappmessaging.internal.injection.modules.GrpcChannelModule.providesGrpcChannel(com.google.firebase:firebase-inappmessaging@@19.0.3:41)
        at com.google.firebase.inappmessaging.internal.injection.modules.GrpcChannelModule_ProvidesGrpcChannelFactory.providesGrpcChannel(com.google.firebase:firebase-inappmessaging@@19.0.3:39)
        at com.google.firebase.inappmessaging.internal.injection.modules.GrpcChannelModule_ProvidesGrpcChannelFactory.get(com.google.firebase:firebase-inappmessaging@@19.0.3:30)
        at com.google.firebase.inappmessaging.internal.injection.modules.GrpcChannelModule_ProvidesGrpcChannelFactory.get(com.google.firebase:firebase-inappmessaging@@19.0.3:9)
        at dagger.internal.DoubleCheck.get(DoubleCheck.java:47)
        at com.google.firebase.inappmessaging.internal.injection.components.DaggerUniversalComponent.gRPCChannel(com.google.firebase:firebase-inappmessaging@@19.0.3:188)
        at com.google.firebase.inappmessaging.internal.injection.components.DaggerAppComponent$com_google_firebase_inappmessaging_internal_injection_components_UniversalComponent_gRPCChannel.get(com.google.firebase:firebase-inappmessaging@@19.0.3:295)
        at com.google.firebase.inappmessaging.internal.injection.components.DaggerAppComponent$com_google_firebase_inappmessaging_internal_injection_components_UniversalComponent_gRPCChannel.get(com.google.firebase:firebase-inappmessaging@@19.0.3:285)
        at com.google.firebase.inappmessaging.internal.injection.modules.GrpcClientModule_ProvidesInAppMessagingSdkServingStubFactory.get(com.google.firebase:firebase-inappmessaging@@19.0.3:35)
        at com.google.firebase.inappmessaging.internal.injection.modules.GrpcClientModule_ProvidesInAppMessagingSdkServingStubFactory.get(com.google.firebase:firebase-inappmessaging@@19.0.3:11)
        at dagger.internal.DoubleCheck.get(DoubleCheck.java:47)
        at com.google.firebase.inappmessaging.internal.GrpcClient_Factory.get(com.google.firebase:firebase-inappmessaging@@19.0.3:26)
        at com.google.firebase.inappmessaging.internal.GrpcClient_Factory.get(com.google.firebase:firebase-inappmessaging@@19.0.3:8)
        at dagger.internal.DoubleCheck.get(DoubleCheck.java:47)
        at com.google.firebase.inappmessaging.internal.ApiClient.getFiams(com.google.firebase:firebase-inappmessaging@@19.0.3:101)
        at com.google.firebase.inappmessaging.internal.InAppMessageStreamManager.lambda$createFirebaseInAppMessageStream$16(com.google.firebase:firebase-inappmessaging@@19.0.3:231)
        at com.google.firebase.inappmessaging.internal.InAppMessageStreamManager$$Lambda$22.call(com.google.firebase:firebase-inappmessaging@@19.0.3)
        at io.reactivex.internal.operators.maybe.M

我使用的是Firebase InApp Messaging的最新版本

implementation'com.google.firebase:firebase应用信息显示：19.0.3'

我已经发现了这些问题，但没有解决方案：

有人有同样的问题吗

更新

我解决了将谷歌番石榴库添加到gradle的问题

实现“com.google.guava:guava:28.2-android”

使用下面的依赖项修复此问题

要使用Gradle添加依赖项，请使用以下命令：

implementation "com.google.guava:guava:28.2-android"

---

有关最新的番石榴库，请参阅此。

您在项目中是否使用番石榴库？我不使用它。如果您指的是CharMatcher，我想它被某个库使用。我解决了在gradle中添加番石榴库的问题

implementation "com.google.guava:guava:28.2-android"