程序类型已存在:OKHTTP3.Call$Factory

Question

Program type already present: okhttp3.Call$Factory
Message{kind=ERROR, text=Program type already present: okhttp3.Call$Factory, sources=[Unknown source file], tool name=Optional.of(D8)}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:27.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'net.openid:appauth:0.7.0'
    implementation 'com.squareup.okhttp3:okhttp:3.10.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation files('libs/easywsdl/ksoap2-android-assembly-3.6.2-jar-with-dependencies.jar')
    implementation files('libs/easywsdl/ExKsoap2-1.0.2.0.jar')
}

如何排除故障？

Answer 1

您的一个.jar应该已经包含OKHTTP3，这可能是实现'com.squareup.okHTTP3:okHTTP:3.10.0'出现问题的原因。

如果删除此依赖项，则不应得到错误。

您可以打印与gradlew app:dependencies一起使用的所有依赖项的树（其中app是用于应用程序的模块的名称，通常是创建新的android应用程序项目时的默认名称）