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

I work on Mac and I just updated Visual Studio for Mac 20109 to the latest version: Version 8.8 (build 2913)

After this, I'm no longer able to build/deploy Android apps I worked on.

I've created an empty new Xamarin.Forms project, but I get the same issue.

The output is:

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.access$100(URLClassLoader.java:74)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader$1.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$1.run(URLClassLoader.java:363)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.security.AccessController.doPrivileged(Native Method)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at sun.misc.Launcher$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.access$100(URLClassLoader.java:74)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader$1.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$1.run(URLClassLoader.java:363)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.security.AccessController.doPrivileged(Native Method)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(579,2): error ADB1000:  at sun.misc.Launcher$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.
Solution

  • You have this line:

    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

    Maybe you should check your Java version in system and in your project. Try to update it and retry, because they might not be the same version number.