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Unable to convert classes into dex format. See the Console for details.

By Vassan on Fri, 07/15/2016 - 15:21

Hi,

  Couldn't able to take Android build. I'm getting error message as 'Unable to convert classes into dex format. See the Console for details.'

 

Unable to convert classes into dex format. See the Console for details./Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/bin/java -Xmx2048M -Dcom.android.sdkmanager.toolsdir="/Users/HBI-MacMini/Library/Android/sdk/tools" -Dfile.encoding=UTF8 -jar "/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/sdktools.jar" -

stderr[Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0at 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:274)at SDKMain.main(SDKMain.java:127)]stdout[

]UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)UnityEditor.Android.AndroidSDKTools.RunCommandInternal (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)UnityEditor.Android.AndroidSDKTools.RunCommandSafe (System.String javaExe, System.String sdkToolsDir, System.String[] sdkToolCommand, Int32 memoryMB, System.String workingdir, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)UnityEditor.HostView:OnGUI()

 

After searching in google. They need to check duplicate jar file. I tried in folder Vuforia.jar and VuforiaUnityPlayer.jar present two time.One in Plugin -> Android ->  

Another one is in Temp/StagingArea/plugins

I delete one set of .jar file. After that camera is not starting. 

I'm having the same problem as Vassan, using Unity and Vuforia in OS X. The error goes away when you delete Vuforia.jar and VuforiaUnityPlayer.jar from /Users/Shared/Unity/<Project Name>/Assets/Plugins/Android/. But then the resultant apk only shows a black screen when run.

kenneth33

Fri, 01/06/2017 - 18:13

Permalink

Hi,

Don't delete the jar files, instead just need to update java to 1.8 or higher,  but VERY IMPORTANT: You need to change the Unity Java Path: on Edit-> Preferences -> External Tools and change to update the SDK to the new folder with 1.8> of Java.