又是 Xamarin 的一天！甚至无法构建我的第一个 Hello World 项目！不奇怪吧?
Another day with Xamarin! Can't even build my first Hello World project! Not surprising, huh?
所以，全新的 Xamarin.Android 空白项目.启用ProGuard，链接到仅SDK 程序集，然后继续构建项目.而且wallah！！有一个错误！(等等，我不应该感到惊讶，对吧?毕竟是 Xamarin).这是错误:
So, fresh new Xamarin.Android blank project. Enabled ProGuard, link to SDK Assemblies Only and went on building the project. And wallah!! There's an error!(Wait, i shouldn't be surprised, right? After all, it's Xamarin). Here's the error :
"java.exe" 以代码 1 退出
"java.exe" exited with code 1
双击异常打开 Xamarin.Android.Common.Targets 文件并指向 ProGuard 标记，如下所示:
Double-clicking the exception opens up Xamarin.Android.Common.Targets file and points to the ProGuard tag which is as follows :
<Proguard Condition="'$(AndroidEnableProguard)' == 'True' and '$(_ProguardProjectConfiguration)' != ''" ProguardJarPath="$(ProguardJarPath)" AndroidSdkDirectory="$(_AndroidSdkDirectory)" JavaToolPath="$(JavaToolPath)" ProguardToolPath="$(ProguardToolPath)" ToolExe="$(ProguardToolExe)" UseProguard="$(UseProguard)" JavaPlatformJarPath="$(JavaPlatformJarPath)" ClassesOutputDirectory="$(IntermediateOutputPath)androidinclasses" AcwMapFile="$(_AcwMapFile)" ProguardCommonXamarinConfiguration="$(IntermediateOutputPath)proguardproguard_xamarin.cfg" ProguardGeneratedReferenceConfiguration="$(_ProguardProjectConfiguration)" ProguardGeneratedApplicationConfiguration="$(IntermediateOutputPath)proguardproguard_project_primary.cfg" ProguardConfigurationFiles="$(ProguardConfigFiles)" JavaLibrariesToEmbed="@(_JarsToProguard);@(_InstantRunJavaReference)" ExternalJavaLibraries="@(AndroidExternalJavaLibrary)" DoNotPackageJavaLibraries="@(_ResolvedDoNotPackageAttributes)" ProguardJarOutput="$(IntermediateOutputPath)proguard\__proguard_output__.jar" EnableLogging="$(ProguardEnableLogging)" DumpOutput="$(IntermediateOutputPath)proguarddump.txt" PrintSeedsOutput="$(IntermediateOutputPath)proguardseeds.txt" PrintUsageOutput="$(IntermediateOutputPath)proguardusage.txt" PrintMappingOutput="$(IntermediateOutputPath)proguardmapping.txt" ProguardInputJarFilter="$(_AndroidProguardInputJarFilter)" />所以，我最好的猜测是这可能是与 ProGuard 相关的问题.所以，搜索谷歌并应用我到目前为止找到的所有修复:
So, my best guess was that it might be a ProGuard related issue. So, searched up google and applied all fixes i found so far :
- 更新了 Android SDK
- 将 Java 堆大小设置为 1G(甚至 5G)
- 启用 Multi-Dex
- 更新了混淆器
- 在解决方案中创建了一个新的 proguard.cfg 文件(当然将 build action 设置为 ProGuardConfiguration 并添加了必要的自定义行.
- Updated Android SDK
- Set Java heap size to 1G(and even 5G)
- Enabled Multi-Dex
- Updated ProGuard
- Created a new proguard.cfg file in solution(of course set build action to ProGuardConfiguration and added custom lines that are necessary.
但是，同样的错误指向相同的 ProGuard 标签.现在，在有人开始抨击我说我可能搞砸了 proguard 配置文件之前，这是它的链接:
But still, same error pointing to the same ProGuard tag. Now before anybody starts bashing me saying i could've messed up the proguard configuratiom file, here's the link to it:
- ProGuard.cfg
- 从 Visual Studio 2017 构建输出
我读到这是 Xamarin 中非常常见的问题.所以，我想，有人可能想出了一个真正有效的解决方案！.那么，对我可能遗漏的内容有任何修复或想法吗?
I have read that this is a very common issue in Xamarin. So, i guess, somebody might have come up with a solution that really works!. So, any fixes or ideas on what i might be missing?
推荐答案确保您添加的 proguard 文件不是 Unicode 文本文件(U+FEFF 字节顺序标记 (BOM))，因为 proguard 将失败...
Make sure that the proguard file you added is NOT a Unicode text file (U+FEFF byte order mark (BOM)) as proguard will fail...
启用诊断.MSBuild 的级别日志记录并获取完整的错误消息.
Enable diag. level logging for MSBuild and get the full error message.
Proguard 正在被 Google 的 R8 取代
Proguard is being replaced by Google's R8
如果您使用的是最新版本的 Xamarin，请参考这篇博文作为开始:
If you are using the latest version of Xamarin, refer to this blog post as a start:
- Android 的 D8 dexer 和 R8 收缩器
可以在此处的 Xamarin.Android 存储库中找到有关各种 D8/R8 项目配置的详细信息:
Detailed info on the various D8/R8 project configurations can be found in the Xamarin.Android repo here:
- 这是 D8 和 R8 集成规范Xamarin.Android.
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Xamarin Java.exe 退出,代码为 1(Proguard 问题)
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