.NET MAUI Android 应用程序由于与 AndroidX 依赖项相关的 Java 错误而无法构建

Question

我正在将

Xamarin.Forms

应用程序迁移到

.NET MAUI

并修复了各种问题和错误，最后一个问题是通过添加两个引用解决的：

• Xamarin.AndroidX.Collection

• Xamarin.AndroidX.Collection.Ktx

按照建议here，这似乎有助于解决看起来非常相似的

JAVA

错误，但又弹出了另一个：

Error   JAVA0000    Error in obj\Debug\net8.0-android\lp\141\jl\classes.jar:android/support/v4/app/INotificationSideChannel$Stub.class:
Type android.support.v4.app.INotificationSideChannel$Stub is defined multiple times: obj\Debug\net8.0-android\lp\141\jl\classes.jar:android/support/v4/app/INotificationSideChannel$Stub.class, obj\Debug\net8.0-android\lp\28\jl\bin\classes.jar:android/support/v4/app/INotificationSideChannel$Stub.class
Compilation failed
java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: obj\Debug\net8.0-android\lp\141\jl\classes.jar
android/support/v4/app/INotificationSideChannel$Stub.class
    at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:126)
    at com.android.tools.r8.D8.main(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:5)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: obj\Debug\net8.0-android\lp\141\jl\classes.jar:android/support/v4/app/INotificationSideChannel$Stub.class
    at Version.fakeStackEntry(Version_8.1.56.java:0)
    at com.android.tools.r8.M.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:5)
    at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:81)
    at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:32)
    at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:31)
    at com.android.tools.r8.utils.R0.b(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:2)
    at com.android.tools.r8.D8.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:26)
    at com.android.tools.r8.D8.b(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:13)
    at com.android.tools.r8.D8.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:24)
    at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:113)
    ... 1 more
Caused by: com.android.tools.r8.utils.b: Type android.support.v4.app.INotificationSideChannel$Stub is defined multiple times: obj\Debug\net8.0-android\lp\141\jl\classes.jar:android/support/v4/app/INotificationSideChannel$Stub.class, obj\Debug\net8.0-android\lp\28\jl\bin\classes.jar:android/support/v4/app/INotificationSideChannel$Stub.class
    at com.android.tools.r8.utils.O2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:21)
    at com.android.tools.r8.utils.O2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:26)
    at com.android.tools.r8.utils.A2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:44)
    at com.android.tools.r8.utils.A2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:10)
    at java.base/java.util.concurrent.ConcurrentHashMap.merge(ConcurrentHashMap.java:2056)
    at com.android.tools.r8.utils.A2.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:6)
    at com.android.tools.r8.graph.b4$a.e(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:7)
    at com.android.tools.r8.dex.c.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:58)
    at com.android.tools.r8.dex.c.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:9)
    at com.android.tools.r8.dex.c.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:8)
    at com.android.tools.r8.D8.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:29)
    at com.android.tools.r8.D8.d(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:17)
    at com.android.tools.r8.D8.c(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:1)
    at com.android.tools.r8.utils.R0.a(R8_8.1.56_756d1f50f618dd1c39c000f11defb367a21e9e866e3401b884be16c0950f6f79:28)
    ... 6 more
Directory 'obj\Debug\net8.0-android\lp\141' is from 'androidx.core.core.aar'.   ARC.Mobile.Android      1   

错误的最后表明

AndroidX

依赖项仍然存在问题，但我在这里相当无能。

Answer 1

我在使用这个OCR插件时遇到了同样的问题。您看到这个是因为您正在使用的插件吗？

解决办法是直接添加对

Xamarin.AndroidX.Collection.Ktx

的引用。所以添加：

<PackageReference Include="Xamarin.AndroidX.Fragment.Ktx" Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">
    <Version>1.6.2.2</Version>
</PackageReference>

到您的 csproj 文件。我发现对于你来说，提到的类型有点不同，所以它可能是你的另一个依赖项，你必须使用它。

确保您使用的是所有依赖项的最新版本，我认为这与使用旧版本有关。