json string is not properly shown in android device - string

Question

i am facing a issue on getting JObject, my app is working in emulator and it is not working in device. because the string is not properly converting to JObject.
E/JSON 1111﹕ parsing data {"success":1,"projects":[{"thumbimg":"http:\/\/spvdigi.com\/diyaphp\/images\/lab.png","duration":"3 mins","updated_at":"0000-00-00 00:00:00","keywords":"law,white sheet,pen,pencil,mini bulbs,","materials":"pen,pencil,ball,worksheet","description":"about the law bla bla","subject":"science","target":"k2","created_at":"2015-08-14 14:24:54","pid":"1","rating":"4","procedure":"procedure about this project"},{"thumbimg":"http:\/\/spvdigi.com\/diyaphp\/images\/lab.png","duration":"3 mins","updated_at":"0000-00-00 00:00:00","keywords":"pen,pencil,color pencil,chart,sticks","materials":"pen,pencil,color pencil,chart,sticks,etc","description":"about description of the project","subject":"science","target":"k3","created_at":"2015-08-14 14:25:16",
"pid":"2","rating":"3","procedure":"about description of the procedure"},{"thumbimg":"http:\/\/spvdigi.com\/diyaphp\/images\/lab.png","duration":"5 mins","updated_at":"0000-00-00 00:00:00","keywords":"pen,pencil,wire,chart,sticks","materials":"pen,pencil,color pencil,chart,sticks,eraser","description":"about description of the project","subject":"english","target":"k4","created_at":"2015-08-14 14:25:21",
....
"pid":"8","rating":"3","procedure":"about description of the procedure"}]}
the above is the output of the jsonObject, the below is the correct result showing in emulator
{"projects":[{"pid":"1","target":"k2","subject":"science","description":"about the law bla bla","duration":"3 mins","materials":"pen,pencil,ball,worksheet","procedure":"procedure about this project","keywords":"law,white sheet,pen,pencil,mini bulbs,","thumbimg":"http:\/\/spvdigi.com\/diyaphp\/images\/lab.png","rating":"4","created_at":"2015-08-14 14:24:54","updated_at":"0000-00-00 00:00:00"},{"pid":"2","target":"k3","subject":"science","description":"about description of the project","duration":"3 mins","materials":"pen,pencil,color pencil,chart,sticks,etc","procedure":"about description of the procedure","keywords":"pen,pencil,color pencil,chart,sticks","thumbimg":"http:\/\/spvdigi.com\/diyaphp\/images\/lab.png","rating":"3","created_at":"2015-08-14 14:25:16","updated_at":"0000-00-00 00:00:00"},
...
{"pid":"8","target":"k3","subject":"english","description":"to learn english tenses","duration":"3 mins","materials":"white sheet,pen,pencil,eraser","procedure":"about description of the procedure","keywords":"english,grammer,tenses","thumbimg":"http:\/\/spvdigi.com\/diyaphp\/images\/lab.png","rating":"3","created_at":"2015-08-18 06:45:28","updated_at":"0000-00-00 00:00:00"}],"success":1}
this is my jsonparse class code:
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
static String jboolean = "0";
static JSONArray jarr =null;
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, 10000);
HttpConnectionParams.setSoTimeout(httpParameters, 10000 + 12000);
DefaultHttpClient httpClient = new DefaultHttpClient(new BasicHttpParams());
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("Content-type","application/json");
httpPost.setParams(httpParameters);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
Log.e("Buffer 11", "Error converting result " + e.toString());
} catch (ClientProtocolException e) {
e.printStackTrace();
Log.e("Buffer 22", "Error converting result " + e.toString());
} catch (IOException e) {
e.printStackTrace();
Log.e("Buffer 33", "Error converting result " + e.toString());
}
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();
//Log.e("JSON 1111 ", "parsing data " + json.toString());
} catch (Exception e) {
Log.e("Buffer Error????", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
Log.e("JSON 1111 ", "parsing data " + jObj.toString());
} catch (JSONException e) {
Log.e("JSON Parser44", "Error parsing data " + e.toString());
}
return jObj;
/// This JObj is not properly getting the json string???
// return JSON String
}
}
Is there any issues on the above code? i am facing a issue on getting JObject, my app is working in emulator and it is not working in device. because the string is not properly converting to JObject.