Retrofit 2.0 java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING
EDIT: this answer is not valid for Retrofit 2+.
See what's new in Retrofit 2: http://inthecheesefactory.com/blog/retrofit-2.0/.
It may not help you in this case, but I've encountered the very same problem in one of my projects and the solution was to set the JSON converter to a custom instance of Gson.
Add this to your Retrofit.Builder:
.setConverter(new GsonConverter(new Gson()))EDIT: it may conflict with
addConverterFactory(). Unless you need it and know why, I'd take it out.