android - AsyncTask OnPostExecute interface listener java.lang.NullPointerException error -

First of all, my asynchronous works do the perfect job while bringing data to show up on my activity. But when I click to start any other activity, I get the java.lang.NullPointerException error here:

  protected void onPostExecute (JSONObject jsonArray ) {//super.onPostExecute (jsonArray); Error here - & gt; OnTaskComplete.setMyTaskComplete (jsonArray); If (pDialog! = Null) pDialog.dismiss (); / * If (jsonArray! = Null) {arrVer (jsonArray); } * /}  

Does anybody know that the cause of the problem can be?

try it ...

  protected void onPostExecute (JSONObject jsonArray ) {//super.onPostExecute (jsonArray); If (jsonArray! = Null) {onTaskComplete.setMyTaskComplete (jsonArray); If (pDialog! = Null) pDialog.dismiss (); // rest of your code}}  

PS:

Be sure you're getting JSONObject Or JSONArray or string this exception as the parameter of this function.

may be the reason for