Unity 5 Android Build Failure - No Plugins

I have run into a similar error several times in the past with different android plugins and I know how to fix that … but now I have no plugins because I believed that deleting them should solve the issue but it didn’t… Here is the error:

Error building Player: CommandInvokationFailure: Unable to convert classes into dex format. See the Console for details.
/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/bin/java -Xmx2048M -Dcom.android.sdkmanager.toolsdir=“/Users/oyinmiebiperealbert/Documents/android-sdk-macosx/tools” -Dfile.encoding=UTF8 -jar “/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/sdktools.jar” -

Exception in thread “main” java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:278)
at SDKMain.main(SDKMain.java:127)


I have no idea on what to do since I have no plugin in the project. Please, I will appreciate some help

Hit this problem, and it went away when I updated my version of the JDK to from 1.7 → 1.8.

Hope that helps!

After you install JDK 1.8 you may need to update your Unity preferences to point to it.

in File > Preferences > External Tools, click the “Browse” button to the right of the JDK configuration box and choose the right directory. On my mac, it was /Library/Java/JavaVirtualMachines/jdk1.8.0_92.jdk/Contents/Home.