Error : Failed to build apk

HI !

When i try to build my game into a apk file for android game i have this error :

CommandInvokationFailure: Failed to build apk. C:/Program Files/Java/jdk1.7.0_79\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/Users/Desim/AppData/Local/Android/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -

stderr[ Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/sdklib/build/ApkCreationException : 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:274) at SDKMain.main(SDKMain.java:128) ] stdout[

] ...

So i have searched on the forum and i saw we need to create a select a keystore, so i made that but the problem is always here.

The problem is "stdout" say nothing.

If someone know why ? :(