android - How to keep running timer with service? -


i have problem services hope me. have countdown timer in activity , want keep running service. when copy codes compiler shows nullpointerexception. please me. codes these:

public void setmytimer(){      countdown.start(86400);     countdown.setoncountdownendlistener(new countdownview.oncountdownendlistener() {         @override         public void onend(countdownview cv) {              if (m == 0) {                 = + 1000000;                 if (a == 366000000) {                     = 0;                     snackbar snackbar = snackbar.make(coordinator, "game over", snackbar.length_long);                     snackbar.show();                     cv.stop();                 } else {                     m = m + a;                     money.settext(string.valueof(m));                     cv.start(86400000);                 }              } else {                 snackbar snack = snackbar.make(coordinator, "you ddin't spend money", snackbar.length_long);                 snack.show();             }          }     });  }

and service class's codes are:

public class timerservice extends service {  private mainactivity mainactivity = new mainactivity();   @nullable @override public ibinder onbind(intent intent) {      return null; }   @override public int onstartcommand(intent intent, int flags, int startid) {       mainactivity.setmytimer();      return start_sticky; }

}

if codes ruins sorry because beginner yet.

you cannot create activity via call new, managed framework based on intents. same thing service. separate components , should not contain direct references other.

i'd suggest walking through course on basic android development , java in order past issues , more familiar framework.


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