Parse JSON URL - JSONException Error

Question

Please could you give me a hand here, I am trying to parse a JSON file from a URL. Below is the code that i used to grab the file and initially just posted it to a TextView but now I want to parse the tags and use them?

private void postData(final String param, final TextView tv) {

    final RequestQueue request = Volley.newRequestQueue(this);

    JSONObject postReq = new JSONObject(Request.Method.GET, url_login, new Response.Listener<JSONObject>() {

        @Override
        public void onResponse(JSONObject response) {

        }
    }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
            System.out.println("Error [" + error + "]");

        }
    }) {

        @Override
        public Map getHeaders() throws AuthFailureError {
            Map headers = new HashMap();
            headers.put("Accept", "application/json");
            System.out.println(headers);
            return headers;
        }
    };
    request.add(postReq);
}

an example of the JSON is below

{
“UserInfo”: {
    “User”: {
        “name”: “Craig”,
        “surname”: "Churchill",
        "userId": "1463353",
        "userAlias": "Craig"
    }
  }
}

I have tried this but have just failed constantly and just cannot get it right.

enter image description here

Please remove your comma at the end (after "Craig") ... and can you added your exception, it is useful, sometimes ... — biology.info, May 15 '15 at 11:40
@biology.info jsonlint doesn't pass if it comes with a comma on the last key-value pair. But I´ve worked with some jsons with them and they don't crash. — reixa, May 15 '15 at 11:54
guys, the comma on the end was a mistake, that was just a small snippet of the JSON and i just forgot the comma there. This JSON is used on a live environment at the moment which works fine for others. — Stillie, May 15 '15 at 12:10
look at the image, if you press ALT+ENTER on error IDE will "try to help" — Selvin, May 15 '15 at 12:31
Thanks! Learned something new! :D did not know that!! haha! see u can do the @Overrides as well!! nice! — Stillie, May 15 '15 at 12:32

reixa · Accepted Answer · 2015-05-15T12:16:29.953

{
    "UserInfo": {
        "User": {
            "name": "Craig",
            "surname": "Churchill",
            "userId": "1463353",
            "userAlias": "Craig"
        }
    }
}

It´s a valid json. I´ve tried it on http://jsonlint.com/ But you've got some double commas that have a weird encoding. I put the json above with a right doble comma enconding, since jsonlint was giving errors validating the json until I changed them.

The problem might be on how you're accesing the object and it´s childrens. Try this way.

@Override
public void onResponse(JSONObject response) {
    try {
        JSONObject userObj = response.getJSONObject("UserInfo")
                            .getJSONObject("User");
        String name = userObj.getString("name");
        ...
    } catch (JSONException jsEx) {
        jsEx.printStackTrace();
    }

}

Parse JSON URL - JSONException Error

1 Answers1