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Android Reference

CountDownTimer


android.os

Class CountDownTimer



  • public abstract class CountDownTimer
    extends Object
    Schedule a countdown until a time in the future, with regular notifications on intervals along the way. Example of showing a 30 second countdown in a text field:
     new CountDownTimer(30000, 1000) {
    
         public void onTick(long millisUntilFinished) {
             mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
         }
    
         public void onFinish() {
             mTextField.setText("done!");
         }
      }.start();
     
    The calls to onTick(long) are synchronized to this object so that one call to onTick(long) won't ever occur before the previous callback is complete. This is only relevant when the implementation of onTick(long) takes an amount of time to execute that is significant compared to the countdown interval.
    • Constructor Detail

      • CountDownTimer

        public CountDownTimer(long millisInFuture,
                      long countDownInterval)
        Parameters:
        millisInFuture - The number of millis in the future from the call to start() until the countdown is done and onFinish() is called.
        countDownInterval - The interval along the way to receive onTick(long) callbacks.
    • Method Detail

      • cancel

        public final void cancel()
        Cancel the countdown.
      • onTick

        public abstract void onTick(long millisUntilFinished)
        Callback fired on regular interval.
        Parameters:
        millisUntilFinished - The amount of time until finished.
      • onFinish

        public abstract void onFinish()
        Callback fired when the time is up.


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