Visual Studio for Mac 2019：更新后无法在 Android 上构建和部署

Question

我在 Mac 上工作，我刚刚将 Visual Studio for Mac 20109 更新到最新版本：Version 8.8（内部版本 2913）

在此之后，我无法再build/deploy Android 我开发的应用程序。

我创建了一个空的新 Xamarin.Forms 项目，但我遇到了同样的问题。

输出为：

zipalign
    /Users/pacodoso/Library/Developer/Xamarin/android-sdk-macosx/build-tools/30.0.0/zipalign exited with value: 0
    Creating: /var/folders/yv/7m_37_p15g1bymlxqxmcgv3r0000gn/T/2medl58y.mxk/Mono.Android.Platform.ApiLevel_28.apk
    Executing: /Users/pacodoso/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_8.0.25/bin/java -jar "/Users/pacodoso/Library/Developer/Xamarin/android-sdk-macosx/build-tools/30.0.0/lib/apksigner.jar" sign --ks "/Users/pacodoso/.local/share/Xamarin/Mono for Android/debug.keystore" --ks-key-alias "androiddebugkey" --out "/var/folders/yv/7m_37_p15g1bymlxqxmcgv3r0000gn/T/2medl58y.mxk/Mono.Android.Platform.ApiLevel_28.apk" --ks-pass "pass:android" --key-pass "pass:android" "/var/folders/yv/7m_37_p15g1bymlxqxmcgv3r0000gn/T/2medl58y.mxk/unsigned.apk"
    /Users/pacodoso/Library/Developer/Xamarin/android-sdk-macosx/build-tools/30.0.0/zipalign exited with value: 0
    Creating: /var/folders/yv/7m_37_p15g1bymlxqxmcgv3r0000gn/T/2medl58y.mxk/Mono.Android.Platform.ApiLevel_28.apk
    Executing: /Users/pacodoso/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_8.0.25/bin/java -jar "/Users/pacodoso/Library/Developer/Xamarin/android-sdk-macosx/build-tools/30.0.0/lib/apksigner.jar" sign --ks "/Users/pacodoso/.local/share/Xamarin/Mono for Android/debug.keystore" --ks-key-alias "androiddebugkey" --out "/var/folders/yv/7m_37_p15g1bymlxqxmcgv3r0000gn/T/2medl58y.mxk/Mono.Android.Platform.ApiLevel_28.apk" --ks-pass "pass:android" --key-pass "pass:android" "/var/folders/yv/7m_37_p15g1bymlxqxmcgv3r0000gn/T/2medl58y.mxk/unsigned.apk"
    Removing temporary directory: /var/folders/yv/7m_37_p15g1bymlxqxmcgv3r0000gn/T/2medl58y.mxk
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  Deployment failed
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000: Xamarin.AndroidTools.AndroidSdkToolException: Error: A JNI error has occurred, please check your installation and try again
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000: Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/apksigner/ApkSignerTool has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.defineClass1(Native Method)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.access0(URLClassLoader.java:74)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.run(URLClassLoader.java:369)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.run(URLClassLoader.java:363)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.security.AccessController.doPrivileged(Native Method)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000: 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.PlatformPackage.GetPlatformPackagePathAsync (System.Int32 apiLevel, System.String aaptPath, Xamarin.AndroidTools.IProgressNotifier progressReporter, System.Threading.CancellationToken token) [0x00270] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/PlatformPackage.cs:139 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.InstallSharedPlatformAsync () [0x000a9] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:349 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.EnsureCorrectSharedRuntimes () [0x0017a] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:270 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.RunAsync (System.Threading.CancellationToken token) [0x001f9] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:198 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.RunLoggedAsync (System.Threading.CancellationToken token) [0x0002f] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:123 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000: Xamarin.AndroidTools.AndroidSdkToolException: Error: A JNI error has occurred, please check your installation and try again
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000: Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/apksigner/ApkSignerTool has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.defineClass1(Native Method)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.access0(URLClassLoader.java:74)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.run(URLClassLoader.java:369)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.run(URLClassLoader.java:363)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.security.AccessController.doPrivileged(Native Method)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000: 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.PlatformPackage.GetPlatformPackagePathAsync (System.Int32 apiLevel, System.String aaptPath, Xamarin.AndroidTools.IProgressNotifier progressReporter, System.Threading.CancellationToken token) [0x00270] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/PlatformPackage.cs:139 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.InstallSharedPlatformAsync () [0x000a9] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:349 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.EnsureCorrectSharedRuntimes () [0x0017a] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:270 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.RunAsync (System.Threading.CancellationToken token) [0x001f9] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:198 
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:   at Xamarin.AndroidTools.AndroidDeploySession.RunLoggedAsync (System.Threading.CancellationToken token) [0x0002f] in /Users/builder/azdo/_work/451/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Xamarin.AndroidTools/Sessions/AndroidDeploySession.cs:123 
Done building target "_Upload" in project "DebugAndroidIssue.Android.csproj" -- FAILED.

Done building project "DebugAndroidIssue.Android.csproj" -- FAILED.

Build FAILED.

Answer 1

你有这条线：

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/apksigner/ApkSignerTool has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0

也许您应该检查系统和项目中的 Java 版本。尝试更新它并重试，因为它们可能不是相同的版本号。

Visual Studio for Mac 2019：更新后无法在 Android 上构建和部署

Visual Studio for Mac 2019 : unable to build and deploy on Android after update

java

android

xamarin

visual-studio-mac

visual-studio-2019