Null Pointer Exception while retrieving JSON object

Question

I am new to JSON. I am using http://pnrapi.appspot.com/ to get the status of a particular train using JSON. But while trying to parse the received object i always get a null poi

Answer 1

use get instead of getString as:

try {
    JSONObject jsona=new JSONObject("{'status': 'INVALID', 'data': 'No results'}");
    String id = (String)jsona.get("status");
    Toast.makeText(DfgdgdfgdfActivity.this, id, Toast.LENGTH_LONG).show();
} catch (JSONException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

EDIT:

use

while ((line = reader.readLine()) != null) {
                sb.append(line);
            }

instead of

while ((line = reader.readLine()) != null) {
                sb.append(line + "n");
            }