android - proguard doesnt preserve string values -

I would like to use proguard for ambiguity and I have the following problem: I am using a wizardder package with User input between step, which is being done using @ContextVariable annotations.

Finally all the values ​​are collected and the SQL DB is inserted, although I'm getting an exception due to some exceptions.

When I am using dontobfuscate, everything works properly

How can someone overcome this idea? I searched and implemented many solutions but none was useful

Thanks for your help in Advanced

To solve the problem, I have added the following for the ProgRD-Rule file

  --keepclassmembers class * {static java.lang.String *; }  

The move was: -)