Unable to Create Android Standalone App

[Sionech2004]

Hello,
I wanted to save my application as standalone for android. But everytime I try to do it, it says "Could not compile service support class".
I found some Topics in the Forum, but none of them could help me.
Also, in preferences>mobile support, below the Android SDK root, It says: "JDK Path: (none)" but I entered the Android SDK root.
I hope you can help me.