notifyDataSetChanged is not working

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http://stackoverflow.com – I fetched data in JSON from web service and then i put data into a custom ListView. On clicking an item of ListView , I open a new Activity. Now I click on "Submit" Button of this activity I go back to the same ListView , When I get back to the ListView, I want to change the text of listitem in which I clicked before I just want to refresh or re-call the activity when it again comes to listticket.java Right now data is static . I used web services. listticket.java public class listticket extends Activity { static ListView listView; ArrayList<String> aryTicket = new Array (HowTos)