android - How to connect a countdowntimer to a button -

i'm working android studio. i'm creating app has countdowntimer , button. when run application, timer automatically runs , if want click button there textview counts how many times press button. want timer starts when press button ,the countdown continue running , stops @ time "0:000" stops counting of clicks. can me? (if helps put code)

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      txtcount = (textview)findviewbyid(r.id.textview1);     txtcount.settext(string.valueof(count));     btncount = (button)findviewbyid(r.id.button1);     final textview textviewtimer = (textview)findviewbyid(r.id.textview2);     btncount.setonclicklistener(new view.onclicklistener() {         public void onclick(view arg0) {             count++;             txtcount.settext(string.valueof(count));         }      });     new countdowntimer(10000, 1) {         public void ontick(long millisuntilfinished) {             textviewtimer.settext("" + millisuntilfinished / 1000                     + ":" + millisuntilfinished % 1000);         }          public void onfinish() {             textviewtimer.settext("0:000");         }     }.start();   } 

i don't write rest of code of other things privacy, interested part ;)

edited

you can save link countdowntimer , use anywhere want. , issue can have 2 boolean variables : timerstarts - responsible start timer once, timerprocessing - responsible check if timer still processing.

like this:

@override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main);  txtcount = (textview)findviewbyid(r.id.textview1); txtcount.settext(string.valueof(count)); btncount = (button)findviewbyid(r.id.button1);  boolean timerprocessing = false; boolean timerstarts = false;  final textview textviewtimer = (textview)findviewbyid(r.id.textview2); //saving link timer object final countdowntimer timer = new countdowntimer(10000, 1) {     public void ontick(long millisuntilfinished) {         textviewtimer.settext("" + millisuntilfinished / 1000             + ":" + millisuntilfinished % 1000);     }      public void onfinish() {         textviewtimer.settext("0:000");         timerprocessing = false;     } });  btncount.setonclicklistener(new view.onclicklistener() {     public void onclick(view arg0) {         //start timer once when button first click         if (!timerstarts){             timer.start();             timerstarts = true;             timerprocessing = true;         }          if (timerprocessing){             count++;             txtcount.settext(string.valueof(count));         } } }); } 

or can have 1 variable (e.g. timerstarts), check in button listener , set false when timer stops, when click button after timer stopped start again. hope helps.