java - Changing url/ip when asynctask is running repeatedly -

i have call getxmltask service , repeatedly call every 1 seconds data ip address (myip).

myservice.java

public class myservice extends service {     public int onstartcommand(intent intent, int flags, int startid) {         if (globalfunctions.isinternetavailable(myservice.this)                 || globalfunctions.iswifi(myservice.this)) {              mytimertask mytask = new mytimertask();             timer mytimer = new timer();              mytimer.schedule(mytask, 1000, 1000);          } else {             toast.maketext(myservice.this, "no internet connection", 1000).show();         }          return service.start_sticky;     }      class mytimertask extends timertask {         public void run() {             getxmltask task = new getxmltask();             task.execute(new string[] { myip });         }         } } 

asynctask use in getxmltask.java.

public class getxmltask extends asynctask<string, void, string> {     @override     protected string doinbackground(string... urls) {          try {             string output = null;             (string url : urls) {                 output = getoutputfromurl(url);             }             return output;         } catch (exception e) {             return null;         }     } } 

and when apps running, have change ip address, "urls" still showing previous ip address (see data eclipse debug mode) , "urls" updated after quite long time.

may know should urls in asynctask can directly take newest ip address without long delay.

thank much

updated 24/4/2014:

i have make changes doinbackground code, data received ip address still not updated data.

protected string doinbackground(string... urls) {     try {         string output = null;         string[] newurl = {globalvariables.global_url + "/status.xml"};         (string url : newurl) {             output = getoutputfromurl(url);         }          return output;     } catch (exception e) {         return null;     } } 

any idea? thank you

updated 25/4/2014:

i have debug code , notice when ip address changed, asynctask seem freeze quite long time. have put break point in doinbackground, , doesn't go in. idea? thank you

the loop in doinbackground processing urls sequentially. may need check change in ip inside loop , if ip has changed needful (for example updating urls accordingly).