android - Running many Asynctask on timer(countdowntimer) -

i have created countdowntimer this

public class mycountdowntimer extends countdowntimer {         public mycountdowntimer(long starttime, long interval) {         super(starttime, interval);         }          @override         public void onfinish() {         //timeout         }          @override         public void ontick(long millisuntilfinished) {           paymentasynctask paymenttask = new paymentasynctask(this);          paymenttask.execute();          } } 

in onpostexecute of paymenttask, doing operations on specific condition.

basically, checking website, after time interval(say 3 second), task has been completed or not.

now if internet runs fast, there no issue code,

if task gets completed,i cancel timer in onpostexecute , further work.

but if internet runs slow, means response doesn't come in 3 seconds, onpostexecute called more once(executing code inside more once), while task completed, got response late due server issue/internet delay.

how can make sure code inside onpostexecute gets called once?

possible approaches:

1. take static flag variable, make true , check in others...

i looking solution, reliable, maybe android provides mechanism synchronise this.. thanks

you can check status of asynctask , depending on current status can perform logic.

please take asynctask object globally in activity class.

code snippet:

public class mycountdowntimer extends countdowntimer {     paymentasynctask paymenttask = null;        public mycountdowntimer(long starttime, long interval) {             super(starttime, interval);       }        @override       public void onfinish() {         //timeout        }        @override       public void ontick(long millisuntilfinished) {          if(paymenttask == null) {             android.util.log.i("tag", "null");             paymenttask = new paymentasynctask(this);             paymenttask.execute();         } else {             //depending on situation take appropriate action             android.util.log.i("tag", "not null");             if(paymenttask.getstatus() == (asynctask.status.pending)) {                 //indicates task has not been executed yet.                 android.util.log.i("tag", "pending");             } else if(paymenttask.getstatus() == (asynctask.status.running)) {                 //indicates task running.                 android.util.log.i("tag", "running");             } else if(paymenttask.getstatus() == (asynctask.status.finished)) {                 //indicates asynctask.onpostexecute has finished.                 android.util.log.i("tag", "finished");             }          }       } } 

i hope can out.

thanks.