Getting JSON values from URL in android

Question

In my application i am trying to retrieve the values from a JSON URL. In the URL there is a point where I am not able to parser the values.. I have tried alot to find the solution but I haven't got any..

In the URL the values that I want to parse is the values of tag_users...

I am attaching the code where I am trying to parser the values so, please help me in finding the solution...

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

String url = "http://flutterr.pnf-sites.info/api/messageshow/2";
        JsonParser jParser = new JsonParser();
        JSONObject json = jParser.getJSONfromUrl(url);
        try
        {
            JSONArray messageshow = json.getJSONArray("messageshow");
            userList.clear();
            for(int i=0; i<messageshow.length();i++)
            {
                JSONObject msg = messageshow.getJSONObject(i);
                message_id = msg.getString("message_id");
                message = msg.getString("message");
                message_pic = msg.getString("message_pic");
                uid = msg.getString("uid");
                created = msg.getString("created");
                username = msg.getString("username");
                first_name = msg.getString("first_name");
                last_name = msg.getString("last_name");
                profile_pic = msg.getString("profile_pic");
                total_likes = msg.getString("total_likes");
                JSONObject tag_user = msg.getJSONObject("tag_user");
                message = tag_user.getJSONObject("tags").getString("message");
                if(message != "false")
                    tag_uid = tag_user.getJSONObject("tags").getString("tag_uid");
                Log.v("uid", tag_uid);
                HashMap<String, String> map = new HashMap<String, String>();
                map.put("message_id", message_id);
                map.put("message", message);
                map.put("message_pic", message_pic);
                map.put("uid", uid);
                map.put("created", created);
                map.put("username", username);
                map.put("first_name", first_name);
                map.put("last_name", last_name);
                map.put("profile_pic", profile_pic);
                map.put("total_likes", total_likes);
                userList.add(map);
            }
        }
        catch(JSONException e)
        {
            Log.e("Error", e.toString());
        }

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Please help me in letting me know that how can I parser the values of tag_uid, tag_uname, tag_fname and tag_lname...

Maybe add an example of your XML, might help people.

Cosmin Pârvulescu
– Cosmin Pârvulescu

2012-10-15 17:50:56 +00:00
Commented Oct 15, 2012 at 17:50 — Cosmin Pârvulescu
– Cosmin Pârvulescu, Commented Oct 15, 2012 at 17:50

Mohsin Naeem · Accepted Answer · 2012-10-15 18:46:41Z

2

try

if(!message.equals("false"))

instead of

if(message != "false")

One more thing check your server side code

in tag_user there is Json Object with name tags in case of zero tags. And it is (tags) is a JsonArray in case of results.

EDIT

if you Json will look like this

   "tag_user": {
  "tags": [
    {
      "tag_uid": "1",
      "tag_fname": "abhishek",
      "tag_lname": "dhiman",
      "tag_uname": "abhishek"
    }
  ]"message": "true" //here true or false to check "tags" array
}

and then in code you can get like

message = tag_user.getJSONObject("message");

                    if(!message.equals("false"))
                    tag_uid = tag_user.getJSONArray("tags").getJSONObject(0).getString("tag_uid");

//will return "tag_uid" of first tag`

edited Oct 15, 2012 at 18:46

answered Oct 15, 2012 at 17:53

Mohsin Naeem

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5 Comments

Abhishek Dhiman Over a year ago

can you please tell me how can I get the values of tag_uid, tag_uname, tag_fname and tag_lname.. rest I have done... and thanks

Mohsin Naeem Over a year ago

see my edit. you need to make the server response consistent, first. I hope you get what I want to tell you?

Abhishek Dhiman Over a year ago

i have tried your code but I am getting this error: org.json.JSONException: Value [{"tag_lname":"dhiman","tag_uname":"abhishek","tag_fname":"abhishek","tag_uid":"1"},{"tag_lname":"tttttt","tag_uname":"tttttt","tag_fname":"tttttt","tag_uid":"4"},{"tag_lname":"qqqqqq","tag_uname":"qqqqqq","tag_fname":"qqqqqq","tag_uid":"3"},{"tag_lname":"Lastname","tag_uname":"Username4","tag_fname":"Firstname","tag_uid":"13"}] at tags of type org.json.JSONArray cannot be converted to JSONObject

Abhishek Dhiman Over a year ago

the code that i have tried is this: JSONObject tag_user = msg.getJSONObject("tag_user"); message = tag_user.getJSONObject("tags").getString("message"); if(!message.equals("false")) { tag_uid = tag_user.getJSONArray("tags").getJSONObject(i).getString("tag_uid"); Log.v("tags", String.valueOf(tag_uid)); }

Mohsin Naeem Over a year ago

you haven't read my answer completely. your tags is a JsonObject in some cases and it is JsonArray in some other cases. So first make them consistent.

avianey · Accepted Answer · 2012-10-15 17:55:02Z

0

tag_user is a JSON object that contains an array :

"tag_user":{"tags":[{"tag_uid":"1","tag_fname":"abhishek","tag_lname":"dhiman","tag_uname":"abhishek"},{"tag_uid":"4","tag_fname":"tttttt","tag_lname":"tttttt","tag_uname":"tttttt"},{"tag_uid":"3","tag_fname":"qqqqqq","tag_lname":"qqqqqq","tag_uname":"qqqqqq"},{"tag_uid":"13","tag_fname":"Firstname","tag_lname":"Lastname","tag_uname":"Username4"}]}

you should try

getJSONArray("tags")

on tag_user object

If you're familiar with Sax parsing try JsonReader from the Gson project : https://sites.google.com/site/gson/streaming

answered Oct 15, 2012 at 17:55

avianey

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2 Comments

Abhishek Dhiman Over a year ago

can you provide me some code so that it can be more clear to me that how can i use getJSONArray("tags");...

Abhishek Dhiman Over a year ago

I have tried using JSONArray tags = tag_user.getJSONArray("tags"); but I am getting the following error: org.json.JSONException: Value [{"tag_lname":"dhiman","tag_uname":"abhishek","tag_fname":"abhishek","tag_uid":"1"},{"tag_lname":"tttttt","tag_uname":"tttttt","tag_fname":"tttttt","tag_uid":"4"},{"tag_lname":"qqqqqq","tag_uname":"qqqqqq","tag_fname":"qqqqqq","tag_uid":"3"},{"tag_lname":"Lastname","tag_uname":"Username4","tag_fname":"Firstname","tag_uid":"13"}] at tags of type org.json.JSONArray cannot be converted to JSONObject... how can I get the values?

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