CODEWITHSUNDEEP
androidjsonexception
Droidman
Droidman

Reputation: 11608

android JSONException while trying to parse JSON data

I use the class below to get some JSON data. The strange thing is, I can't parse JSON only from the url I need to test the app (server-side not maintained by me): if you click on this link, you will be able to see JSON data in your browser. But when I try to parse it programmatically, it throws a JSONException.

  01-03 11:08:23.615: E/JSON Parser(19668): Error parsing data org.json.JSONException:    Value <html><head><title>JBoss of type java.lang.String cannot be converted to JSONObject

I tried to test it with http://ip.jsontest.com/ and http://api.androidhive.info/contacts, it works nicely! Exception is only thrown while trying to parse JSON from my 1st link. I thought it could be a server problem, but I'm able to see JSON data with a browser.. just can't explain that.

   public class JSONParser {

static InputStream is = null;
static JSONObject jObj = null;
static String json = "";

/* default constuctor*/
public JSONParser() {

}

public JSONObject getJSONFromUrl(String url) {

   /* get JSON via http request */
    try {

        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        is = httpEntity.getContent();           

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    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();
        json = sb.toString();
    } catch (Exception e) {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }

    /* try to parse the string to JSON Object*/
    try {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

 /* return JSON String */
    return jObj;

      }
  }

Upvotes: 1

Views: 1731

Answers (1)

Suraj C
Suraj C

Reputation: 462

Using the BufferedReader approach will fetch you the HTML source of that page, which is why you see HTML tags like < html>< head>< title> in your string. Instead, use EntityUtils to get the JSON string:

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);

try {
    HttpResponse httpResponse = httpClient.execute(httpGet);
    HttpEntity httpEntity = httpResponse.getEntity();

    int status = httpResponse.getStatusLine().getStatusCode();

    if (status == HttpStatus.SC_OK) {
        String jsonString = EntityUtils.toString(httpEntity);
        try {
            JSONObject jsonObject = new JSONObject(jsonString);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
} catch (ClientProtocolException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

Upvotes: 1

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