Obfuscating Android

Had a play around with Proguard today. It's an obfuscation tool. Instructions for setting it up for Android are here.

However, I received an error when running
    sudo ant release -v
 The error was:
    Expecting class path separator ':' before '{' in argument number 1

I found the answer - I just needed to add "external.libs.dir=libs" to the default.properties file.

Thanks to Android Bridge