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stringgson

create json using JSONObject

I have to create json string like below,

{ "data": { "data": "message" }, "status": "SUCCESS" }

I am using below code to create json string on the fly,

>         JSONObject jsonObject = new JSONObject();
>         JSONObject jsonData = new JSONObject();
>         try {
>             jsonData.put("data", "message");
>             jsonObject.put("data",jsonData);
>             jsonObject.put("status", "SUCCESS");
>             Log.d("AYadav", new Gson().toJson(jsonObject));
>         } catch (JSONException e) {
>             e.printStackTrace();
>         }

but from above code I am getting below json string,

{ "nameValuePairs": { "data": { "nameValuePairs": { "data": "message" } }, "status": "SUCCESS" } }

Why extra nameValuePairs is coming?

Solution

  • You are mixing two JSON libraries, Gson and (I assume) JSON-java. JSONObject (with "JSON" completely uppercase) is not part of Gson, it belongs to JSON-java.

    If you want to use Gson, then use its class com.google.gson.JsonObject and then at the end call Gson.toJson. Do not call JsonObject.toString() because its documentation currently makes no guarantees that the output will be the JSON document.

    If you want to use JSON-java, then keep using the JSONObject class, but at the end call JSONObject.toString().