升级android版本后，获取“重复类android.support.v4.app.INotificationSideChannel”

Question

在android更新3.4之前，我的应用程序可以完美运行，但是在升级android之后，我的应用程序会出现合并错误：

"Duplicate class android.support.v4.app.INotificationSideChannel"

android update 3.4
upgrade gradle 5.1.1 
upgrade sdk

Error:
    Duplicate class android.support.v4.app.INotificationSideChannel found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.graphics.drawable.IconCompatParcelizer found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.os.IResultReceiver found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.os.IResultReceiver$Stub found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.os.IResultReceiver$Stub$Proxy found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.os.ResultReceiver found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.os.ResultReceiver$1 found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class androidx.core.graphics.drawable.IconCompatParcelizer found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class androidx.core.internal.package-info found in modules classes.jar (androidx.core:core:1.0.0) and classes.jar (com.android.support:support-compat:28.0.0)
    Duplicate class androidx.versionedparcelable.CustomVersionedParcelable found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.NonParcelField found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.ParcelField found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.ParcelImpl found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.ParcelImpl$1 found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.ParcelUtils found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcel found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcel$1 found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcel$ParcelException found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcelParcel found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcelStream found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcelStream$FieldBuffer found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcelStream$InputBuffer found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcelable found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)
    Duplicate class androidx.versionedparcelable.VersionedParcelize found in modules classes.jar (androidx.versionedparcelable:versionedparcelable:1.0.0) and classes.jar (com.android.support:versionedparcelable:28.0.0)

Go to the documentation to learn how to Fix dependency resolution errors.

------------------ DEPENDENCY ------------

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    //noinspection GradleCompatible
//    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:support-compat:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha4'
//    implementation 'com.android.support:design:28.0.0'
    testImplementation 'junit:junit:4.13-beta-2'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    //volley
    implementation 'com.android.volley:volley:1.1.0'
    //crop image library...
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.8.0'
    //ButterKnife
    implementation 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
    //retrofit
    implementation 'com.squareup.retrofit2:retrofit:2.5.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.5.0'
    implementation 'com.squareup.retrofit2:adapter-rxjava:2.5.0'
    implementation 'io.reactivex:rxandroid:1.2.1'
    implementation 'com.github.traex.rippleeffect:library:1.3'
    //Google play services
    implementation 'com.google.android.gms:play-services-location:16.0.0'
    implementation 'com.google.android.gms:play-services-maps:16.1.0'
    //gson
    implementation 'com.google.code.gson:gson:2.8.5'
    // Room
    implementation 'android.arch.persistence.room:runtime:1.1.1'
    implementation 'com.android.support:support-v4:28.0.0'
    annotationProcessor "android.arch.persistence.room:compiler:1.1.1"
    implementation 'org.jsoup:jsoup:1.11.3'
    //cardview & recyclerview
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    //picasoo
    implementation 'com.squareup.picasso:picasso:2.71828'
    implementation 'com.android.support:support-annotations:28.0.0'
    implementation 'de.hdodenhof:circleimageview:3.0.0'
    implementation 'com.karumi:dexter:5.0.0'
    implementation 'com.journeyapps:zxing-android-embedded:3.4.0'
    //firebase
    implementation 'com.google.firebase:firebase-core:16.0.8'
    implementation 'com.google.firebase:firebase-ml-vision:19.0.3'
    //firebase-cloud massaging..
    implementation 'com.google.firebase:firebase-messaging:17.6.0'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

Answer 1

您有androidx个库（可能在一个使用的库中）与support库冲突。

将这些行添加到您的gradle.properties文件中：（位于项目的根目录中）

android.useAndroidX=true
android.enableJetifier=true

Jetifier工具迁移依赖于支持库的库，改为依赖等效的AndroidX软件包。

Answer 2

首先从顶部栏中选择折射器，然后从其中选择折射 到 androidx ，这样它将创建一个<您可以使用strong> zip文件作为备份。

之后，它会自动变好，并修复了导致手机应用程序停止运行的各种错误和错误

就是这样！你做到了

Answer 3

为什么会这样？

由于升级后，当您的项目仍未使用androidx时，可以在某处访问androidx.core:core。因此，现在可以在两个地方找到INotificationSideChannel之类的类，例如androidx.core:core和com.android.support:support-compat。这就是发生此错误的原因。

解决方案？

您需要迁移到应该已经完成​​的AndroidX。如果您不了解AndroidX。请阅读What is AndroidX?

如何迁移当前项目

在Android Studio 3.2（2018年9月）中，可以直接选择将现有项目迁移到AndroidX。这将自动折射所有包装。

在迁移之前，强烈建议您备份项目。

  

现有项目

• Android Studio>重构菜单>迁移到AndroidX ...
• 它将进行分析，并在底部打开“折射器”窗口。接受要完成的更改。

  

新项目

将这些标志放入您的gradle.properties

android.enableJetifier=true
android.useAndroidX=true

检查@ Library mappings for equal AndroidX package.

检查@ Official page of Migrate to AndroidX

Answer 4

您的问题怎么样，您是否已解决问题，因为我也遇到了同样的问题，如果您有答案，可以告诉您解决方案，谢谢您