android - How to pass data from an asynchronous task to an activity that called it? -

i new android. using sockets in asynchronous task , wish pass data activity called it. not want asynchronous task handle ui. wish pass data. class e![enter image description here][1]xtends async task not part of class extends activity

my activity has 2 buttons. when button clicked, async task called , corresponding changes should made rest of activity.

from how send data onpostexecute in asynctask:

class youractivity extends activity {    private static final int dialog_loading = 1;     public void oncreate(bundle savedstate) {      setcontentview(r.layout.yourlayout);      new longrunningtask1().execute(1,2,3);     }      private void onbackgroundtaskdataobtained(list<string> results) {      //do stuff results here..    }     private class longrunningtask extends asynctask<long, integer, list<string>> {         @override         protected void onpreexecute() {           //do pre execute stuff         }          @override         protected list<string> doinbackground(long... params) {             list<string> mydata = new arraylist<string>();              (int = 0; < params.length; i++) {                 try {                     thread.sleep(params[i] * 1000);                     mydata.add("some data" + i);                 } catch(interruptedexception ex) { }                             }              return mydata;         }          @override         protected void onpostexecute(list<string> result) {             youractivity.this.onbackgroundtaskdataobtained(result);         }         }  }