How do I parse this JSON in Java?

Question

I'm a bit new to this and it's doing my head in! I keep getting this error:

Error parsing data org.json.JSONException: No value for tname

This is the json:

[{"tname":"2"},{"kword":"||ice+skating+rink"}]

And here is my java code:

String result = response.toString();

            try
            {
                JSONArray jArray = new JSONArray(result);

                for (int i = 0; i < jArray.length(); i++) {
                    JSONObject json_data = jArray.getJSONObject(i);
                    Log.i("log_tag", ", type: " + json_data.getString("tname")+
                            ", keyword: " + json_data.getString("kword"));

                    type += json_data.getString("tname");
                    keyword += json_data.getString("kword");
                }

Any help greatly appreciated.

The issue doesn't seem to have anything to do with the question in the title. You seem to be able to parse the JSON just fine, you are just not accessing the resulting array/object correctly. The second object doesn't have a property tname. Three possible solutions: a) Make sure your data has all the expected properties. b) Don't access property tname. c) Test the existence of the property before you access it. — Felix Kling
– Felix Kling, Commented Mar 27, 2015 at 21:19

l-l · Accepted Answer · 2015-03-27 21:20:50Z

5

Your second object doesn't have tname. you should check and see if the object has a property before accessing it

if(json_data.has("tname"))    
    type += json_data.getString("tname");
if(json_data.has("kword"))           
    keyword += json_data.getString("kword");

answered Mar 27, 2015 at 21:20

l-l

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4 Comments

ThemuRR Over a year ago

Thanks for the swift reply, I just tried that and am still getting the same error? Any Suggestions?

l-l Over a year ago

This line:

Log.i("log_tag", ", type: " + json_data.getString("tname")+                             ", keyword: " + json_data.getString("kword"));

ThemuRR Over a year ago

My mistake, I implemented it incorrectly. Thanks a million for your help!

ThemuRR Over a year ago

Haha I've been trying, have to wait another minute! :D

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