Error building Player

[iftah]

I get this error when I add the google-play-services_lib folder, located at /extras/google/google_play_services/libproject, into the Plugins/Android folder.

Error building Player: Win32Exception: ApplicationName='C:\Program Files (x86)\Java\jre7\bin\javac.exe', CommandLine='-bootclasspath "D:/adt-bundle-windows-x86_64-20140321/sdk/platforms/android-19\android.jar" -d "D:\Unity Projects\EasyGame\Temp\StagingArea\bin\classes" -source 1.6 -target 1.6 -encoding ascii "com\google\android\gms\R.java" "com\iftah\EasyGame\R.java"', CurrentDirectory='D:\Unity Projects\EasyGame\Temp\StagingArea\gen'

[NamblerX]

I solved this issue by downloading the JDK:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
and then setting the "JAVA_HOME" environment variable to the install directory of the JDK, in my case:
C:\Program Files\Java\jdk1.8.0
and then adding the \bin to the "Path" variable, in my case:
C:\Program Files\Java\jdk1.8.0\bin

I'm not actually sure if you have to do the last two steps, that's just what I read.