代码出现 java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 21

这行代码是ResponseObject> object=new GsonBuilder().create().fromJson(arg0.result, new TypeToken>>(){}.getType());
求问什么原因有什么办法处理吗

 ResponseObject<List<Goods>> object=new GsonBuilder().create().fromJson(arg0.result.toString(), new TypeToken<ResponseObject<List<Goods>>>(){}.getType());