Android handler: Handler does not work as expected -

i have button name btnok, inside button have normal method.

my idea after interval of time, method inside button executed automatically.

so create handler delay function. expected programming working this:

here logic:

user can click button ok => after 20s, if user not click button => run method

my prolem 20s calculated total every time run itent.

for examle:

1. from activity a, start b (the ok button in b, user must click button in 20s),
2. first time, it takes 15s user decides click buton.
3. after that, start activity (like loop => b => => b...);

4. and again, activity b, this time expected method must run after 20s, 5s later (i guess 15s 1st time + 5s after start 2nd time counted total 20s), executed automatically.

   @override protected void oncreate(bundle savedinstancestate) {  //do value();  //create handler final handler handler = new handler();  //run method automatically after 20s handler.postdelayed(new runnable() {     @override     public void run() {         // after 5s = 5000ms         submitresult();     } }, 20000);  //wait user clicks,  //must start in 20s or submitresult(); executed automatically btn = (button) findviewbyid(r.id.btnok); btn.setonclicklistener(new view.onclicklistener() {     public void onclick(view v) {         submitresult();     }  });   } 

can 1 me figure out problem? or way auto onclick after interval of time?

i appreciate helps. in advance.

that first handler running, not new 1 (created in second activity b). if user clicks button, should "cancel" handler, otherwise run submitresult() twice.

try this:

btn.setonclicklistener(new view.onclicklistener() {   public void onclick(view v) {     handler.removecallbacks(null);     submitresult();   } });