flutter run function every x amount of seconds

Question

inside my flutter app I want to check my api every 10 seconds. I found this post to run a function every x amount of time and did the following:

class _MainP         


        

Answer 1

build() can and usually will be called more than once and every time a new Timer.periodic is created.

You need to move that code out of build() like

Timer timer;

@override
void initState() {
  super.initState();
  timer = Timer.periodic(Duration(seconds: 15), (Timer t) => checkForNewSharedLists());
}

@override
void dispose() {
  timer?.cancel();
  super.dispose();
}

Even better would be to move out such code from widgets entirely in an API layer or similar and use a StreamBuilder to have the view updated in case of updated data.