what is the difference between -keep class and -dontwarn

Question

Hey I\'m new with proGuard , I use it to protect my code from reverse engineering , but when I built my signed apk I got a lot of errors when I enabled proGuard ,I have googled

Answer 1

-keep class Preserve the specified classes and class members.

-dontwarn Don't warn about unresolved references at all.

More info here http://proguard.sourceforge.net/manual/refcard.html