Gson and Active Android: Attempted to serialize java.lang.Class. Forgot to register a type adapter? -

i'm using gson serialize active android model. model class contains primitives, , gson should have no issues serializing default settings. however, when try, error:

java.lang.unsupportedoperationexception: attempted serialize java.lang.class: <myclass>. forgot register type adapter?

i rather not write type adapter every 1 of model classes, how can around issue?

figured out. of course, active android's base model class adding fields cannot serialized default. fields can ignored using gson's excluedfieldswithoutexposeannotation() option, follows:

gson gson = new gsonbuilder().excludefieldswithoutexposeannotation().create(); string json = gson.tojson(new book()); 

modify class @expose annotation indicate fields should serialized:

@table(name = "foo") public class foo extends model {      @expose     @column(name = "name")     public string name;      @expose     @column(name = "sort")     public int sort;      ... }