How to run code after some delay in Flutter?

Question

I\'d like to execute a function after a certain delay after my Widget is built. What\'s the idiomatic way of doing this in Flutter?

What I\'m trying to achieve: I\'

Answer 1

await Future.delayed(Duration(milliseconds: 1000));

Answer 2

Just leaving here the snippet everyone is looking for:

Future.delayed(Duration(milliseconds: 100), () {
  // Do something
});

Answer 3

Figured it out

Answer 4

Trigger actions after countdown

Timer(Duration(seconds: 3), () {
  print("Yeah, this line is printed after 3 seconds");
});

Repeat actions

Timer.periodic(Duration(seconds: 5), (timer) {
  print(DateTime.now());
});

Trigger timer immediately

Timer(Duration(seconds: 0), () {
  print("Yeah, this line is printed immediately");
});

Answer 5

import 'dart:async';   
Timer timer;

void autoPress(){
  timer = new Timer(const Duration(seconds:2),(){
    print("This line will print after two seconds");
 });
}

autoPress();

Answer 6

(Adding response on old q as this is the top result on google)

I tried yielding a new state in the callback within a bloc, and it didn't work. Tried with Timer and Future.delayed.

However, what did work was...

await Future.delayed(const Duration(milliseconds: 500));

yield newState;

Awaiting an empty future then running the function afterwards.