VSTS-Xamarin ProGuard版本和JDK 1.8的问题

Question

我有一个Xamarin表单项目，我正试图通过与VST的持续集成与HockeyApps集成。我的应用程序使用Java1.8进行编译，并使用ProGuard压缩android apk文件。但是当java试图编译应用程序时，它发现安装的proguard版本与java 1.8不兼容。错误如下：。。。无法处理类[android/app/ActivityTracker.class]不支持的类版本号[52.0]最大51.0，Java 1.7。。。在本地VisualStudio安装中，我修复了它，替换了Xamarin为最新版本安装的默认proguard版本5。十、

有人知道如何使用VSTS吗？

详细错误：

_CompileToDalvikWithDx:
  C:\Program Files\Java\jdk1.8.0_102\\bin\java.exe -jar C:\java\androidsdk\android-sdk\tools\proguard\lib\proguard.jar -include C:\java\androidsdk\android-sdk\tools\proguard\proguard-android.txt -include obj\Release\proguard\proguard_xamarin.cfg -include obj\Release\proguard\proguard_project_references.cfg -include obj\Release\proguard\proguard_project_primary.cfg -include proguard.cfg "-injars 'obj\Release\proguard\__proguard_input__.jar';'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\MonoAndroid\v7.0\mono.android.jar';'obj\Release\__library_projects__\FormsViewGroup\library_project_imports\formsviewgroup.jar';'obj\Release\__library_projects__\HockeySDK.AndroidBindings\library_project_imports\bin\classes.jar';'C:\Users\buildguest\AppData\Local\Xamarin\Xamarin.Android.Support.Animated.Vector.Drawable\23.3.0.0\embedded\classes.jar';'C:\Users\buildguest\AppData\Local\Xamarin\Xamarin.Android.Support.Design\23.3.0.0\embedded\classes.jar';'C:\Users\buildguest\AppData\Local\Xamarin\Xamarin.Android...
  java.io.IOException: Can't read [C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\MonoAndroid\v7.0\mono.android.jar] (Can't process class [android/app/ActivityTracker.class] (Unsupported class version number [52.0] (maximum 51.0, Java 1.7)))
    at proguard.InputReader.readInput(InputReader.java:230)
    at proguard.InputReader.readInput(InputReader.java:200)
    at proguard.InputReader.readInput(InputReader.java:178)
    at proguard.InputReader.execute(InputReader.java:78)
    at proguard.ProGuard.readInput(ProGuard.java:196)
    at proguard.ProGuard.execute(ProGuard.java:78)
    at proguard.ProGuard.main(ProGuard.java:492)
  Caused by: java.io.IOException: Can't process class [android/app/ActivityTracker.class] (Unsupported class version number [52.0] (maximum 51.0, Java 1.7))
    at proguard.io.ClassReader.read(ClassReader.java:112)
    at proguard.io.FilteredDataEntryReader.read(FilteredDataEntryReader.java:87)
    at proguard.io.JarReader.read(JarReader.java:65)
    at proguard.io.DirectoryPump.readFiles(DirectoryPump.java:65)
    at proguard.io.DirectoryPump.pumpDataEntries(DirectoryPump.java:53)
    at proguard.InputReader.readInput(InputReader.java:226)
    ... 6 more
  Caused by: java.lang.UnsupportedOperationException: Unsupported class version number [52.0] (maximum 51.0, Java 1.7)
    at proguard.classfile.util.ClassUtil.checkVersionNumbers(ClassUtil.java:140)
    at proguard.classfile.io.ProgramClassReader.visitProgramClass(ProgramClassReader.java:88)
    at proguard.classfile.ProgramClass.accept(ProgramClass.java:346)
    at proguard.io.ClassReader.read(ClassReader.java:91)
    ... 11 more
  Picked up JAVA_TOOL_OPTIONS:  -Dfile.encoding=UTF8
C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2025,3): Error MSB6006: "java.exe" exited with code 1.

Answer 1

原因是它使用的JDK1.7不兼容。您可以指定Xamarin构建步骤的JDK版本：

Answer 2

恐怕没有任何解决方法来解决您与托管构建代理的问题，因为用户没有权限更新托管机器上安装的软件。

您需要部署自己的构建代理，然后手动替换文件。