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

Carefully see your code

    try {
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON String
        return jObj;

In above case if you get any JSONException then you are returning jObj which is not initialized,in short you will return null jObj.

So you much handle that situation by checking if returned object is null.

change your code to following

if (jon != null)
{
    String id = jon.getString("status");
    Toast.makeText(getApplicationContext(), id, Toast.LENGTH_LONG).show();
}