在模块 classes.jar 中发现重复的类

Question

使用“ Cxense SDK for Android”，我收到重复类的消息：

Duplicate class android.support.v4.app.INotificationSideChannel found in modules classes.jar (**com.android.support:support-compat:27.1.1**) and classes.jar (**com.android.support:support-v4:22.2.0**)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules classes.jar (com.android.support:support-compat:27.1.1) and classes.jar (com.android.support:support-v4:22.2.0) 
Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules classes.jar (com.android.support:support-compat:27.1.1) and classes.jar (com.android.support:support-v4:22.2.0) 
Duplicate class android.support.v4.app.ListFragment found in modules classes.jar (com.android.support:support-fragment:27.1.1) and classes.jar (com.android.support:support-v4:22.2.0) 
Duplicate class android.support.v4.app.ListFragment$1 found in modules classes.jar (com.android.support:support-fragment:27.1.1) and classes.jar (com.android.support:support-v4:22.2.0) 
Duplicate class android.support.v4.app.ListFragment$2 found in modules classes.jar (com.android.support:support-fragment:27.1.1) and classes.jar (com.android.support:support-v4:22.2.0) 
Duplicate class android.support.v4.app.LoaderManager found in modules classes.jar (com.android.support:support-fragment:27.1.1) and classes.jar (com.android.support:support-v4:22.2.0) 

这是我的应用级build.gradle配置：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.tototita.cxensetestapp"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }


    packagingOptions {
        exclude 'META-INF/LICENSE'
    }
    compileOptions {
        sourceCompatibility = '1.8'
        targetCompatibility = '1.8'
    }


}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.1' 
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

     //**CXsense
     implementation 'com.cxpublic:cxense-android:1.0.1'
}

如何避免 Cxense SDK 中肯定包含的重复类？

Answer 1

有两种方法可以解决您的问题。

1. 排除重复的依赖，而implementation 独立，

2. 以通用方式从每个s 中排除重复的依赖项。implementation

我们先来了解一下问题：

在这里，在您的情况下，工件com.android.support是重复的，因为您的应用程序模块使用版本 : 27.1.1而您的工件com.cxpublic:cxense-android:1.0.1具有com.android.support使用版本的内部依赖性：22.2.0。

因此，您应该手动删除其中之一（建议删除旧版本或较低版本）。让我们尝试删除它！

通过第一种方法：

implementation ('com.cxpublic:cxense-android:1.0.1') {
    exclude group: "com.android.support", module: "support-v4"
}

当我们在这个工件上使用我们的实现时，将exclude for group com.android.support放在我们的工件中com.cxpublic:cxense-android:1.0.1不会被导入到support-v4库中。

因此，问题将通过手动将此块放置到每个具有此冲突的工件来解决。

第二种方式：

我们可以删除包含的依赖项，并用一个最新编号的包替换它们。在我们的例子中，它support-v4具有不同的版本。因此，转到应用程序级别build.gradle的 android 块并将块放在那里以support-v4从所有工件中删除重复项，以便我们可以有不同的依赖项。

android {
    // Some other stuffs
    configurations {
        all*.exclude module: 'support-v4' // This removes all other versions of `support-v4` if gets duplicated from all the artifacts.
    }
    // Rest of other stuffs
}

Answer 2

如果有重复，请使用exclude：

implementation ('com.cxpublic:cxense-android:1.0.1') {
    exclude group: "com.android.support", module: "support-v4"
}

或删除implementation 'com.android.support:appcompat-v7:27.1.1'以支持support-v4.

参见：https : //discuss.gradle.org/t/how-do-i-exclude-specific-transitive-dependencies-of-something-i-depend-on/17991