JSON Exception String cannot be converted to JSON Object

Question

I am trying to parse json and running into a small problem.

my json string looks like this:

String json =
    [
        "{caption=blah, url=/storage/emulated/0/DCIM/Camera/20140331_164648.jpg}",
        "{caption=adsf, url=/storage/emulated/0/DCIM/Camera/20140330_103412.jpg}"
    ]

and my code so far looks like this:

try {
JSONArray jsonObj = new JSONArray(json);

for (int i = 0; i < jsonObj.length(); i++) {
    JSONObject c = jsonObj.getJSONObject(i);



    String img = c.getString("url");
    String cap = c.getString("caption");

But its throwing an exception type java.lang.String cannot be converted to JSONObject

What am I doing wrong?

EDIT

If its helpful to anyone, I ended up using GSON to get my json in the correct expected format like this:

Gson gson = new Gson();
String json = gson.toJson(mylist);

You used the line getJSONObject but you aren't trying to get a JSONObject, you are trying to get a String. — takendarkk
– takendarkk, Commented Apr 9, 2014 at 16:01
may you want your json to look like [{"caption": "blah","url": "/storage/emulated/0/DCIM/Camera/20140331_164648.jpg"} — Raghunandan
– Raghunandan, Commented Apr 9, 2014 at 16:09
@FaisalAli I did, Its valid as a whole but as Sotirios states below its just not in the format I expected — BluGeni
– BluGeni, Commented Apr 9, 2014 at 16:09

Sotirios Delimanolis · Accepted Answer · 2014-04-09 16:00:54Z

3

Your JSON array contains elements like

"{caption=blah, url=/storage/emulated/0/DCIM/Camera/20140331_164648.jpg}"

which is a String not a JSON object. You can't therefore try to retrieve it as a JSONObject.

Seems like you're getting JSON that isn't in the format you expected. Even if you got rid of the "" around it, it still wouldn't be valid JSON, so I don't understand its purpose enough to help you.

answered Apr 9, 2014 at 16:00

Sotirios Delimanolis

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2 Comments

BluGeni Over a year ago

Is there a better way to convert an arraylist like this ` public ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); ` to a json string with objects?

Sotirios Delimanolis Over a year ago

@BluGeni That Java object maps well to JSON like [{"":""}, ...]. In other words a JSON array that contains JSON objects. Each JSON object is a name-value pair of Strings.

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