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Given the following code:
final class retVal { int photo_id; }
Gson gson = new Gson();
retVal ret = gson.fromJson("{\"photo_id\":\"383\"}", retVal.class);
I get ret set to null.
I’m sure I’ve missed something obvious out, as toJson with a class also fails, although hand-construction through JsonObject works.
Declare your class
retValoutside the method.