我一直为我的依赖项获得一个"重复类"，但我无法弄清楚它是哪一个。我需要所有这些。
我尝试一次删除一个以查看错误是否消失，但它只是给出了不同的错误，基本上告诉我我需要这种依赖关系。
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'com.google.firebase:firebase-auth:16.0.5'
implementation 'com.google.android.gms:play-services-auth:17.0.0'
implementation 'com.google.firebase:firebase-database:16.0.4'
implementation 'com.google.firebase:firebase-messaging:17.3.4'
implementation 'com.google.firebase:firebase-config:16.1.0'
implementation 'com.google.android.gms:play-services-ads:18.2.0'
implementation 'com.google.android.material:material:1.0.0'
}
错误的几行。没有给出完整的错误，因为 TLDR。
Duplicate class com.google.android.gms.internal.measurement.zzfq found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfr found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfs found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzft found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfu found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfv found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfw found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfx found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfy found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
Duplicate class com.google.android.gms.internal.measurement.zzfz found in modules classes.jar (com.google.android.gms:play-services-measurement-impl:17.0.0) and classes.jar (com.google.firebase:firebase-analytics:16.0.4)
感谢大家的帮助！
基本上，这些类都在两个模块中。我在尝试在我的应用程序上使用 aws 服务时收到此错误。您可以像这样排除重复的模块：
implementation ('com.google.firebase:firebase-database:16.0.4'){
exclude group:'com.google.android.gms.internal.measurement'
}