JSON Array Problem

Question

Hy!

I have a JSON Array with the tv channels and the lenght of the array is three, but after transmitting into a treemap the Value is only one.

Please Help

Code:

try
            {

                JSONObject menuobj = this.getJSONObject("responseData");
                Log.e("XXX", menuobj.toString());
                JSONArray array = menuobj.getJSONArray("countries");
                TreeMap<String, Integer> map = new TreeMap<String, Integer>();
                for (int i = 0; i < array.length(); i++)
                {
                    JSONObject obj = new JSONObject();
                    obj = array.getJSONObject(i);
                    if (obj.getString("name").equals(country))
                    {
                        Log.e("XXX2", obj.toString());
                        JSONArray arr = obj.getJSONArray("channels");
                        Log.e("XXX3", String.valueOf(arr.length()));
                        for (int j = 0; j < arr.length(); j++)
                        {
                            JSONObject obj2 = new JSONObject();
                            obj2 = arr.getJSONObject(i);
                            map.put(obj2.getString("name"), obj2.getInt("id"));
                        }
                        Log.e("XXX4", String.valueOf(map.size()));
                        return map;
                    }


                }

LogCat:

02-01 18:24:20.277: ERROR/XXX(3784): {"countries":[{"id":"1","channels":[{"id":"3","name":"ARD"},{"id":"1","name":"ORF 1"},{"id":"2","name":"ORF 2"}],"name":"Ã?sterreich"},{"id":"2","channels":[{"id":"3","name":"ARD"}],"name":"Deutschland"}]}
02-01 18:24:20.288: ERROR/XXX2(3784): {"id":"1","channels":[{"id":"3","name":"ARD"},{"id":"1","name":"ORF 1"},{"id":"2","name":"ORF 2"}],"name":"Ã?sterreich"}
02-01 18:24:20.297: ERROR/XXX3(3784): 3
02-01 18:24:20.307: ERROR/XXX4(3784): 1

Yahel · Accepted Answer · 2011-02-01 18:36:24Z

2

I believe :

obj2 = arr.getJSONObject(i);

should be

obj2 = arr.getJSONObject(j);

So you are putting three times the same object pair of key/value to the map.

answered Feb 1, 2011 at 18:36

Yahel

8,5302 gold badges26 silver badges32 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Aliostad · Accepted Answer · 2011-02-01 18:33:50Z

0

You need to use JSONArray without JSONObject:

 JSONArray resultJson = new JSONArray(responseDataString);

answered Feb 1, 2011 at 18:33

Aliostad

81.9k21 gold badges164 silver badges209 bronze badges

Comments

Andrzej Doyle · Accepted Answer · 2011-02-01 18:34:25Z

0

You're missing an important logging detail, call it XXX3.5. It's almost certainly the case that the map contains one element because each call to map.put() is passing in a key that is considered equal to the key already inside the map.

Now I'd expect these keys to be the String names of the channels, which are distinct, so clearly this expectation isn't holding. Adding a log message of obj2.getString("name") (or alternatively setting a breakpoint there), will let you see what the map keys actually are, and why subsequent calls are overwriting the existing mapping. Outputting the actual class of the object would be useful too, in order to distinguish between an actual String and some class that merely contains a String.

If the elements look sensible, the problem could be a loose definition of equals() on the class in question, which equates elements that ought to seem distinct. In any case, better logging will show why

arr.getJSONObject(0).getString("name").equals(arr.getJSONObject(1).getString("name")

returns true when you expect this to return false.

answered Feb 1, 2011 at 18:34

Andrzej Doyle

104k33 gold badges191 silver badges231 bronze badges

1 Comment

user547995 Over a year ago

^^ three time ARD 02-01 18:38:46.627: ERROR/XXX3.5(4148): ARD 02-01 18:38:46.627: ERROR/XXX3.5(4148): ARD 02-01 18:38:46.627: ERROR/XXX3.5(4148): ARD

Collectives™ on Stack Overflow

JSON Array Problem

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related