JSONException: no value for data

Question

I want to fetch json data from this link: link

& here is my code for that:

private static String url = "https://graph.facebook.com/fql?q=SELECT%20url,%20normalized_url,%20share_count,%20like_count,%20comment_count,%20total_count,%20commentsbox_count,%20comments_fbid,%20click_count%20FROM%20link_stat%20WHERE%20url=%27https://www.facebook.com/BillionHands%27";
// JSON Node names
private static final String TAG_DATA = "data";
private static final String TAG_SHARE = "share_count";
private static final String TAG_LIKE = "like_count";
private TextView LikeTv;
public String like;
JSONArray data = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_about_us);
 StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
 StrictMode.setThreadPolicy(policy);
 // Creating JSON Parser instance
 JSONParser jParser = new JSONParser();
 // getting JSON string from URL
 JSONObject json = jParser.getJSONFromUrl(url);
 try {
 // Getting Array of Contacts
 data = json.getJSONArray(TAG_DATA);
 JSONObject c = data.getJSONObject(0);
 // Storing each json item in variable
 String share = c.getString(TAG_SHARE);
 like = c.getString(TAG_LIKE);
 Log.i("Like Count",like);
 } catch (JSONException e) {
 e.printStackTrace();
 }
 LikeTv = (TextView) findViewById(R.id.tvLike);
 LikeTv.setText(like);

Now I am getting "JSONException: no value for data" Please help... whats wrong in my code..

• Denys Séguret: You should always precise the language you use (java I guess) and where you get the exception.
• Harry Potter: Ohh..... sorry sorry..!! I am fetching data in my android application where I need to get the "like_count" for this particular page. & I am getting error on this line "data = json.getJSONArray(TAG_DATA); "

Answer 1

Well....
I got your problem solution...
The method you wrote getJSONFromUrl()..
I am sure it contains HttpPost object..
change that to HttpGet and it will start working...

EDIT

Here is the code I tried with

public class MainActivity extends Activity {
 private static String url = "https://graph.facebook.com/fql?q=SELECT%20url,%20normalized_url,%20share_count,%20like_count,%20comment_count,%20total_count,%20commentsbox_count,%20comments_fbid,%20click_count%20FROM%20link_stat%20WHERE%20url=%27https://www.facebook.com/BillionHands%27";
 // JSON Node names
 private static final String TAG_DATA = "data";
 private static final String TAG_SHARE = "share_count";
 private static final String TAG_LIKE = "like_count";
 private TextView LikeTv;
 public String like;
 JSONArray data = null;
 @SuppressLint("NewApi")
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
 StrictMode.setThreadPolicy(policy);
 // Creating JSON Parser instance
 JSONParser jParser = new JSONParser();
 // getting JSON string from URL
 JSONObject json = jParser.getJSONfromURL(url);
 try {
 // Getting Array of Contacts
 Log.d("JSON ","DATA "+json);
 data = json.getJSONArray(TAG_DATA);
 JSONObject c = data.getJSONObject(0);
 // Storing each json item in variable
 String share = c.getString(TAG_SHARE);
 like = c.getString(TAG_LIKE);
 Log.i("Like Count",like);
 } catch (JSONException e) {
 e.printStackTrace();
 }
 }
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 // Inflate the menu; this adds items to the action bar if it is present.
 getMenuInflater().inflate(R.menu.activity_main, menu);
 return true;
 }
}
class JSONParser
{
 public JSONObject getJSONfromURL(String url) {
 InputStream is = null;
 String result = "";
 JSONObject jArray = null;
 // http post
 try {
 HttpClient httpclient = new DefaultHttpClient();
 HttpGet httpget = new HttpGet(url);
 HttpResponse response = httpclient.execute(httpget);
 HttpEntity entity = response.getEntity();
 is = entity.getContent();
 } catch (Exception e) {
 Log.e("log_tag", "Error in http connection " + e.toString());
 }
 // convert response to string
 try {
 BufferedReader reader = new BufferedReader(new InputStreamReader(
 is, "iso-8859-1"), 8);
 StringBuilder sb = new StringBuilder();
 String line = null;
 while ((line = reader.readLine()) != null) {
 sb.append(line + "\n");
 }
 is.close();
 result = sb.toString();
 } catch (Exception e) {
 Log.e("log_tag get data string ",
 "Error converting result " + e.toString());
 }
 try {
 jArray = new JSONObject(result);
 } catch (JSONException e) {
 Log.e("log_tag create object ",
 "Error parsing data " + e.toString());
 }
 return jArray;
}
}

• Harry Potter: Oh my god...!!! Oh my god..!! It worked..!!! :) Thank you very much buddy, you just made my day..!!! :) :)

Answer 2

The "data" element in your JSON isn't an array, it is a JSONobject. So instead of:

JSONArray data = json.getJSONArray(TAG_DATA);

Try this:

JSONObject data = json.getJSONObject(TAG_DATA);

From the JSONObject, you can get items like TAG_SHARE and TAG_LIKE.

Good luck!

• Harry Potter: Thanks for the help but it didn't work... :( Still getting same exception but now on line "JSONObject data = json.getJSONObject(TAG_DATA);"...