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Issue
This message indicates a problem adding an Android native library (*.so file) to your .NET for Android project's APK file during the build.
Situations include:
- .NET for Android is unable to determine the Android ABI for the library.
- If coming from an assembly reference, .NET for Android will skip this file and emit a warning mentioning the file.
- If coming from within the .NET for Android project, .NET for Android will give an error mentioning the file.
- Duplicate instances of native libraries were found.
- .NET for Android will include the first entry in the APK and emit a warning indicating the duplicate file.
See the Android documentation to learn about Android ABIs.
Common causes:
- The .NET for Android project contains either an
@(EmbeddedNativeLibrary)or@(AndroidNativeLibrary)build action in a directory that is not named a valid Android ABI. - The .NET for Android project is referencing two Android library projects
that contain the same native library via an
@(EmbeddedNativeLibrary)or@(AndroidNativeLibrary)build item.
Solution
- Place any Android native libraries within a directory in your .NET for Android project named with the appropriate ABI, such as arm64-v8a, armeabi-v7a, x86, or x86_64.
- Remove any duplicate instances of the native library.