How to pause / sleep thread or process in Android?

Question

I want to make a pause between two lines of code, Let me explain a bit:

-> the user clicks a button (a card in fact) and I show it by changing the background of thi

Answer 1

I use CountDownTime

new CountDownTimer(5000, 1000) {

    @Override
    public void onTick(long millisUntilFinished) {
        // do something after 1s
    }

    @Override
    public void onFinish() {
        // do something end times 5s
    }

}.start(); 

Answer 2

Or you could use:

android.os.SystemClock.sleep(checkEvery)

which has the advantage of not requiring a wrapping try ... catch.

Answer 3

You probably don't want to do it that way. By putting an explicit sleep() in your button-clicked event handler, you would actually lock up the whole UI for a second. One alternative is to use some sort of single-shot Timer. Create a TimerTask to change the background color back to the default color, and schedule it on the Timer.

Another possibility is to use a Handler. There's a tutorial about somebody who switched from using a Timer to using a Handler.

Incidentally, you can't pause a process. A Java (or Android) process has at least 1 thread, and you can only sleep threads.

Answer 4

If you use Kotlin and coroutines, you can simply do

GlobalScope.launch {
   delay(3000) // In ms
   //Code after sleep
}

And if you need to update UI

GlobalScope.launch {
  delay(3000)
  GlobalScope.launch(Dispatchers.Main) {
    //Action on UI thread
  }
}

Answer 5

I know this is an old thread, but in the Android documentation I found a solution that worked very well for me...

new CountDownTimer(30000, 1000) {

    public void onTick(long millisUntilFinished) {
        mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
    }

    public void onFinish() {
        mTextField.setText("done!");
    }
}.start();

https://developer.android.com/reference/android/os/CountDownTimer.html

Hope this helps someone...

Answer 6

I use this:

Thread closeActivity = new Thread(new Runnable() {
  @Override
  public void run() {
    try {
      Thread.sleep(3000);
      // Do some stuff
    } catch (Exception e) {
      e.getLocalizedMessage();
    }
  }
});