java - How to properly set custom long click listener? -

i'm trying set own long click listener on unlock button. whenever press unlock button summarize duration , can unlock permanently clicking.

unlock.setontouchlistener(new view.ontouchlistener() {                 @override                 public boolean ontouch(final view v, motionevent event) {                     if (event.getaction() == motionevent.action_down) {                         unlock.settext("press unlock");                         islongpress = true;                         handler handler = new handler();                         handler.postdelayed(new runnable() {                             @override                             public void run() {                                 if (islongpress) {                                     unlock();                                 }                             }                         }, longclickduration); //amount of time of long click                     } else if (event.getaction() == motionevent.action_up) {                         unlock.settext("unlock");                         islongpress = false;                     }                     return true;                 }             });         }catch (exception e) {             // todo: handle exception         }     } 

if want handle long clicks consider using following code:

        unlock.setonlongclicklistener(new view.onlongclicklistener() {             @override             public boolean onlongclick(view v) {                 code             }         }); 

but if unlock(); should invoked after (customizable) amount of time, should measure time in motionevent.action_up handler. @attaullah khan said, use systemclock.elapsedrealtime() system timer correctly count number of milliseconds @ 2 moments (when button pressed , released) , if time greater longclickduration invoke unlock

the handler.postdelayed call in motionevent.action_down handler invokes check of pressed state after longclickduration interval , if button gets pressed @ moment, verification passes not correct