Unable to create/sign APK File for Android

Hi,

My Question is.... What am I missing?!? What's wrong!!!!!!!!!!!!!!!

I have been trying for quite some time to build to Unity, and everytime I do, it keeps failing over and over. I have tried several things, and to no avail. I keep getting a "Failed to Sign APK Error".

I have JDK-9 installed, with Environment Path set to JDK-9, and unity external Tools set to JDK-9.

In Environment Variables I have:

• Variables: JAVA_HOME Value set to "..\Java\jdk-9\bin" (I have also tried "..\Java\JDK-9"

• Variables: PATH Value set to "..\Program Files\Java\jdk-9\bin"

SYSTEM VARIABLES:

• Variable JAVA_HOME set to "..\Java\jdk-9\bin"

• Variable PATH set to "..\Java\jdk-9"

I have Android SDK, Build Versions 16, 25, 26, full. I have NDK as well (although i dont think its needed).

UNITY

In Unity I have UnityPreferences / External Tools set too:

• Android SDK : "../AppData/Local/Android/sdk"

• JDK: "../Java/jdk-9"

• NDK: "../android-ndk-r10e"

PLAYER SETTINGS:

• Version: 0.1.0

• Min API: 4.1

• Bundle Version Code: 1

• Target API: Automatic

• Script Runtime: .NET 3.5 Stable

• Scripting Backend: Mono

• API Compatibility: 2.0

Keystore is browsed to correct directory. keystore password is correct (attempted to remake it 4x incase it was wrong, also have keystore pass, and key-pass matching just in case) I have tried Unsigned, and Signed Keys.

I have tried both Internal, and Gradle. (gradle is still to new to find enough info on it, so only tried once and stopped).

This app is not on the google play store, just simply testing. I have tried signing it in different ways, matching passwords, etc, and it still fails. Below is the error I get.

I have also tried updating the Android SDK Tools Folder in the Android SDK directory to previous version of 25.2.5 as indicated in several forum posts like this one:

• https://stackoverflow.com/questions/42538433/not-finding-android-sdk-unity

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  CommandInvokationFailure: Failed to sign APK package. C:\Users\alexm\AppData\Local\Android\sdk\build-tools\26.0.1\apksigner.bat sign --ks "D:/1 - Unity Projects/UntilYouDie/UntilYouDie/DeploymentDocs/user.keystore" --ks-pass pass:"fuzzysmurf123" --ks-key-alias "until you die" --key-pass pass:"fuzzysmurf123" "D:\1 - Unity Projects\UntilYouDie\UntilYouDie\Temp/StagingArea/Package.apk"

  stderr[ java.lang.UnsupportedClassVersionError: com/android/apksigner/ApkSignerTool : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source) Exception in thread "main" ] stdout[

  ] exit code: 1 UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.Android.PostProcessor.Tasks.TasksCommon.Exec (System.String command, System.String args, System.String workingdir, System.String errorMsg) UnityEditor.Android.PostProcessor.Tasks.BuildAPK.SignPackage (UnityEditor.Android.PostProcessor.PostProcessorContext context) UnityEditor.Android.PostProcessor.Tasks.BuildAPK.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) UnityEditor.HostView:OnGUI()

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I'm at a loss. any help would be appreciated.