How can I delay onClick action

Question

I am trying to do something in java app (android) and I need something to delay/wait for an amount of seconds for a loop. How can I do delay android function? I have tried to use Thread.sleep(), TimeUnit.sleep, but it is only going to do irresponsible program for some seconds. I want to do some onClick actionlistener which updating for some seconds. e.g: if I clicked to button -> Text is changed to random(int) and it's should be done per second.

random ... waiting for a second ... random ... waiting for a second ... random ... and so many times

for (int i = 0; i < 10; i++) {
    int random = r.nextInt(100) - 10;
    String rand = Integer.toString(random);
    textView3.setText(rand);
    TimeUnit.SECONDS.sleep(1);
}

Answer 1

Use Handler with postDelayed, example:

final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
  @Override
  public void run() {
    Log.d("Log:", "Hello!");
    handler.postDelayed(this, 1000);
  }
}, 1000);