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Question

While migrating a Xamarin.Forms app into .NET MAUI and fixing different issues, I’m getting “Type android.support.v4.app.INotificationSideChannel$Stub$Proxy is defined multiple times” from my Android part of the solution:

Error JAVA0000 in objDebugnet8.0-androidlp144jlclasses.jar:android/support/v4/app/INotificationSideChannel$Stub$Proxy.class:
Type android.support.v4.app.INotificationSideChannel$Stub$Proxy is defined multiple times: objDebugnet8.0-androidlp144jlclasses.jar:android/support/v4/app/INotificationSideChannel$Stub$Proxy.class, objDebugnet8.0-androidlp29jlbinclasses.jar:android/support/v4/app/INotificationSideChannel$Stub$Proxy.class
Compilation failed
java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: objDebugnet8.0-androidlp144jlclasses.jar
android/support/v4/app/INotificationSideChannel$Stub$Proxy.class
    at com.android.tools.r8.utils.S0.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:135)
    at com.android.tools.r8.D8.main(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:5)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: objDebugnet8.0-androidlp144jlclasses.jar:android/support/v4/app/INotificationSideChannel$Stub$Proxy.class
    at Version.fakeStackEntry(Version_8.2.33.java:0)
    at com.android.tools.r8.T.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:5)
    at com.android.tools.r8.utils.S0.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:82)
    at com.android.tools.r8.utils.S0.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:32)
    at com.android.tools.r8.utils.S0.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:31)
    at com.android.tools.r8.utils.S0.b(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:2)
    at com.android.tools.r8.D8.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:42)
    at com.android.tools.r8.D8.b(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:13)
    at com.android.tools.r8.D8.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:40)
    at com.android.tools.r8.utils.S0.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:122)
    ... 1 more
Caused by: com.android.tools.r8.utils.b: Type android.support.v4.app.INotificationSideChannel$Stub$Proxy is defined multiple times: objDebugnet8.0-androidlp144jlclasses.jar:android/support/v4/app/INotificationSideChannel$Stub$Proxy.class, objDebugnet8.0-androidlp29jlbinclasses.jar:android/support/v4/app/INotificationSideChannel$Stub$Proxy.class
    at com.android.tools.r8.utils.Q2.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:21)
    at com.android.tools.r8.utils.D2.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:54)
    at com.android.tools.r8.utils.D2.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:10)
    at java.base/java.util.concurrent.ConcurrentHashMap.merge(ConcurrentHashMap.java:2056)
    at com.android.tools.r8.utils.D2.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:6)
    at com.android.tools.r8.graph.m4$a.d(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:6)
    at com.android.tools.r8.dex.c.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:61)
    at com.android.tools.r8.dex.c.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:12)
    at com.android.tools.r8.dex.c.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:9)
    at com.android.tools.r8.D8.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:45)
    at com.android.tools.r8.D8.d(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:17)
    at com.android.tools.r8.D8.c(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:69)
    at com.android.tools.r8.utils.S0.a(R8_8.2.33_429c93fd24a535127db6f4e2628eb18f2f978e02f99f55740728d6b22bef16dd:28)
        ... 6 more
Directory 'objDebugnet8.0-androidlp144' is from 'androidx.core.core.aar'.

The package references from the Android project:

<PackageReference Include="CommunityToolkit.Maui.Markup" Version="4.0.0" />
<PackageReference Include="Controls.UserDialogs.Maui" Version="1.5.4" />
<PackageReference Include="IdentityModel.OidcClient" Version="6.0.0" />
<PackageReference Include="Syncfusion.Maui.Core" Version="26.1.38" />
<PackageReference Include="Xamarin.AndroidX.Activity" Version="1.9.0.3" />
<PackageReference Include="Xamarin.AndroidX.Activity.Ktx" Version="1.9.0.3" />
<PackageReference Include="Xamarin.AndroidX.Collection" Version="1.4.0.5" />
<PackageReference Include="Xamarin.AndroidX.Collection.Ktx" Version="1.4.0.4" />
<PackageReference Include="Xamarin.AndroidX.Core" Version="1.13.1.2" />
<PackageReference Include="Xamarin.AndroidX.Legacy.Support.V4" Version="1.0.0.26" />
<PackageReference Include="Xamarin.Azure.NotificationHubs.Android" Version="1.1.4.1" />
<PackageReference Include="Xamarin.Google.Dagger" Version="2.50.0" />
<PackageReference Include="Xamarin.GooglePlayServices.Base" Version="118.4.0" />
<PackageReference Include="Microsoft.Maui.Controls" Version="8.0.60" />
<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.60" />

I have previously fixed multiple AndroidX related issues with explicit dependencies in the project file already, but this does not seem related to them.

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Danh mục

.NET MAUI Android app build fail due to JAVA0000 error