JSONObject transforms to nameValuePair

Example:

class Example {
 @SerializedName("exampleField")
    public JSONObject exampleField = new JSONObject("{\"name\":\"Nick\"}");
}

Log.e(TAG,gson.toJson(new Example()))

result:

"exampleField": {
  "nameValuePairs": {
   "name": "Nick"
  }
 }

expected Result:

"exampleField": {
   "name": "Nick"
   }

[JakeWharton]

Use com.google.gson.JsonObject not org.json.JSONObject.

[lingyfh]

GsonBuilder registerTypeAdapter

new GsonBuilder()
.registerTypeAdapter(JSONObject.class, JSONObjectAdapter.sInstance)
.registerTypeAdapter(JSONArray.class, JSONArrayAdapter.sInstance)

    static class JSONObjectAdapter implements JsonSerializer<JSONObject>, JsonDeserializer<JSONObject> {

        public static JSONObjectAdapter sInstance = new JSONObjectAdapter();

        @Override
        public JsonElement serialize(JSONObject src, Type typeOfSrc, JsonSerializationContext context) {
            if (src == null) {
                return null;
            }

            JsonObject jsonObject = new JsonObject();
            Iterator<String> keys = src.keys();
            while (keys.hasNext()) {
                String key = keys.next();
                Object value = src.opt(key);

                JsonElement jsonElement = context.serialize(value, value.getClass());
                jsonObject.add(key, jsonElement);
            }
            return jsonObject;
        }

        @Override
        public JSONObject deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
            if (json == null) {
                return null;
            }
            try {
                return new JSONObject(json.toString());
            } catch (JSONException e) {
                e.printStackTrace();
                throw new JsonParseException(e);
            }
        }
    }


    static class JSONArrayAdapter implements JsonSerializer<JSONArray>, JsonDeserializer<JSONArray> {

        public static final JSONArrayAdapter sInstance = new JSONArrayAdapter();

        @Override
        public JsonElement serialize(JSONArray src, Type typeOfSrc, JsonSerializationContext context) {
            if (src == null) {
                return null;
            }
            JsonArray jsonArray = new JsonArray();
            for (int i = 0; i < src.length(); i++) {
                Object object = src.opt(i);
                JsonElement jsonElement = context.serialize(object, object.getClass());
                jsonArray.add(jsonElement);
            }
            return jsonArray;
        }

        @Override
        public JSONArray deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
            if (json == null) {
                return null;
            }
            try {
                return new JSONArray(json.toString());
            } catch (JSONException e) {
                e.printStackTrace();
                throw new JsonParseException(e);
            }
        }
    }