Xamarin Android: Error including native library in application
我正在尝试将本机库导入我的 Xamarin Android 应用程序。我已经构建了 test.so 文件，并且包含了适当的 Dllopen 代码。问题是当我尝试部署应用程序时，我不断收到”DllImport error loading library”错误。这是完整的错误。
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> DllImport attempting to load: ‘test’. 07-20 11:07:26.428 D/Mono
> (11429): DllImport error loading library > ‘/storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest’: > ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest” > not found’. 07-20 11:07:26.428 D/Mono (11429): DllImport error > loading library > ‘/storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest.so’: > ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest.so” > not found’. 07-20 11:07:26.428 D/Mono (11429): DllImport error > loading library ‘/system/lib/libtest’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//system/lib/libtest” > not found’. 07-20 11:07:26.428 D/Mono (11429): DllImport error > loading library ‘/system/lib/libtest.so’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//system/lib/libtest.so” > not found’. 07-20 11:07:26.428 D/Mono (11429): DllImport error > loading library ‘libtest’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest” not found’. > 07-20 11:07:26.428 D/Mono (11429): DllImport error loading library > ‘libtest.so’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest.so” not found’. > 07-20 11:07:26.428 D/Mono (11429): DllImport error loading library > ‘test’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/test” not found’. 07-20 > 11:07:26.438 D/Mono (11429): DllImport error loading library > ‘/storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest’: > ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library > ‘/storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest.so’: > ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest.so” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library ‘/system/lib/libtest’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//system/lib/libtest” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library ‘/system/lib/libtest.so’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//system/lib/libtest.so” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library ‘libtest’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest” not found’. > 07-20 11:07:26.438 D/Mono (11429): DllImport error loading library > ‘libtest.so’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest.so” not found’. > 07-20 11:07:26.438 D/Mono (11429): DllImport error loading library > ‘libtest’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest” not found’. > 07-20 11:07:26.438 W/Mono (11429): DllImport unable to load library > ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest” not found’. > 07-20 11:07:26.438 D/Mono (11429): DllImport attempting to load: > ‘test’. 07-20 11:07:26.438 D/Mono (11429): DllImport error loading > library > ‘/storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest’: > ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library > ‘/storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest.so’: > ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//storage/emulated/0/Android/data/XammarinDemo.XammarinDemo/files/.__override__/libtest.so” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library ‘/system/lib/libtest’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//system/lib/libtest” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library ‘/system/lib/libtest.so’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm//system/lib/libtest.so” > not found’. 07-20 11:07:26.438 D/Mono (11429): DllImport error > loading library ‘libtest’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest” not found’. > 07-20 11:07:26.438 D/Mono (11429): DllImport error loading library > ‘libtest.so’: ‘dlopen failed: library >”/data/app/XammarinDemo.XammarinDemo-1/lib/arm/libtest.so” not found’. |
我按照 https://developer.xamarin.com/guides/android/advanced_topics/using_native_libraries/ 此处所述的流程进行操作。我通过解压缩确认 libtest.so 包含在 apk 中，但似乎 android 在定位 .so 文件时遇到问题。我该如何解决这个问题？
- 此问题的一个常见原因是没有为测试设备或仿真器的体系结构提供库。使用路径嗅探或为每个目标部署架构适当设置 <Abi> 元素非常重要。
- 你有正确的 Build Action 设置吗？其次，是否包含正确架构的 .so ？ ph0b.com/android-abis-and-so-files
- @BrendanZagaeski 我正在 HTC One 手机上进行测试，按照此处的说明，我在 armeabi-v7 文件夹下有 libtest.so。 developer.xamarin.com/guides/android/advanced_topics/… 我也尝试将其放在名为 armeabi 的文件夹下，但均无效
- @JonDouglas 我将构建操作设置为 AndroidNativeLibrary。
- 您可以使用以下命令行验证您的设备使用的体系结构：adb shell getprop | grep cpu(请注意，如果 adb 命令不在您的 PATH 中，您必须导航到包含 adb 命令的文件夹)。如果您返回 armeabi-v7 以外的任何内容，那么这可能是 Brendan 建议的问题。
- @jgoldberger 嗨谢谢。我运行命令得到了这个 [ro.product.cpu.abi2]: [armeabi] [ro.product.cpu.abi]: [armeabi-v7a] [ro.product.cpu.abilist32]: [armeabi-v7a, armeabi] [ro.product.cpu.abilist64]: [] [ro.product.cpu.abilist]: [armeabi-v7a,armeabi] 不知道该怎么做。这是否意味着该设备同时支持 armeabi 和 armeabi-v7a？
- 看起来是这样。您是否尝试将库放在 armeabi-v7a 文件夹中？
根据您提到的 xamarin 文档，您可以使用路径嗅探或项目文件让链接器知道什么是什么。
现在，路径嗅探不适用于 Visual Studio。您的 dll 将放在名为 ARM、ARM64 等的目录中。路径”嗅探器”期望路径类似于 armeabi、armeabi-v7a 等。您可以更改每个平台的输出路径，或更改您的项目文件。
如果您选择项目文件(应在外部编辑器中手动编辑)，结果应如下所示：
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<ItemGroup>
<EmbeddedNativeLibrary Include=”..\\CD.AndroidDll\ elease\\ARM64\\libDemo.so”> <Link>lib\\arm64\\libDemo.so</Link> <ABI>arm64-v8a</ABI> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </EmbeddedNativeLibrary> <EmbeddedNativeLibrary Include=”..\\CD.AndroidDll\ elease\\ARM\\libDemo.so”> <Link>lib\\arm\\libDemo.so</Link> <ABI>armeabi-v7a</ABI> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </EmbeddedNativeLibrary> <EmbeddedNativeLibrary Include=”..\\CD.AndroidDll\ elease\\x64\\libDemo.so”> <Link>lib\\x64\\libDemo.so</Link> <ABI>x86_64</ABI> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </EmbeddedNativeLibrary> <EmbeddedNativeLibrary Include=”..\\CD.AndroidDll\ elease\\x86\\libDemo.so”> <Link>lib\\x86\\libDemo.so</Link> <ABI>x86</ABI> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </EmbeddedNativeLibrary> <None Include=”Resources\\AboutResources.txt” /> |
剩下的唯一问题是 armeabi 与 armeabi-v7a。该应用程序似乎没有查看 armeabi-v7a 设备上的 armeabi 文件夹。如果将两个 ABI 定义添加到同一个链接库，则仅使用第二个。您也不能将同一个文件链接两次。
您唯一的选择是手动复制库并添加它。或者干脆把 armeabi 排除在外。毕竟，你现在很难找到不支持 armeabi-v7a 的设备。
来源：https://www.codenong.com/38484974/
