Duplicate class android.support.v4.app.INotificationSideChannel found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub$Proxy found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$1 found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
> Task :app:checkDebugDuplicateClasses FAILED
Execution failed for task ':app:checkDebugDuplicateClasses'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable
>
Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.os.IResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub$Proxy found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.os.ResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.os.ResultReceiver$1 found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules core-1.7.0-runtime (androidx.core:core:1.7.0) and support-compat-27.0.1-runtime (com.android.support:support-compat:27.0.1)
以上类似报错出现的时候 记住 : 打开 gradle.properties文件
像我一样 加入最后那行代码 "android.enableJetifier=true"
可以选择直接复制 我的标题 然后sync 就ok了
为什么会报错 ? 为啥这样能解决?
gradle中配置android.useAndroidX与android.enableJetifier使应用对support库的依赖自动转换为androidx的依赖
android.useAndroidX=true 表示“Android插件会使用对应的AndroidX库，而非Support库”；
未设置时默认为false；
android.enableJetifier=true 表示Android插件会通过重写其二进制文件来自动迁移现有的第三方库，以使用AndroidX依赖项；未设置时默认为false；
总结一下就是
useAndroidX 就是然他用androidx库不用support
enableJetfilter 就是迁移第三方库的作用 androidX的依赖项
因为你想要用androidX库里的东西 所以你要用enableJetfliter来迁移他的库来与你的适配