Postdelayed in android help

Question

Im a android newbie please forgive me.
This is a stopwatch code i found on a book.what is the postdelayed() method used for?why do we want to delay it,it is a stopwatch i thought it should be running continuously without any delay?
this sentence is from the book "you use it to post code that should be run in the future".what do you mean by post code?
https://code.sololearn.com/cqt30h4DU1jN/?ref=app

Answer 1

to make a stop watch
you wont make it running continuosly
you will let it run repeated every second
so you use post delay method on your metgod lets say
doSomeThing() every 1000 milli second
you call it postDelay(doSomeThing(),1000);
it will be repeated every second

in the stop watch you will let it each second add one to your seconds counter so it will work like a real watch

this is what i think :)

Answer 2

thanks i got one more android question.could you help?it is my most recent post.

Answer 3

ok