How can I return String or JSONObject from asynchronous callback using Retrofit?

Question

For example, calling

api.getUserName(userId, new Callback() {...});

cause:

retrofit.RetrofitError: retrofit.         


        

Answer 1

A possible solution would be to use JsonElement as the Callback type (Callback). In your original example:

api.getUserName(userId, new Callback() {...});

In the success method you can convert the JsonElement to either a String or a JsonObject.

JsonObject jsonObj = element.getAsJsonObject();
String strObj = element.toString();