Android countdown

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抹茶落季
抹茶落季 2021-02-20 18:11

I want to write a countdown in android which starts counting from 3 to 0. Like at first 3 in appearing and then disappearing and 2 is appearing and so on. I searched a lot but I

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  • 2021-02-20 18:51

    use CountDownTimer

    For example:

    import android.os.CountDownTimer;   
    
    MyCount timerCount;
    public class TestCountdown extends Activity {
    
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        timerCount = new MyCount(3 * 1000, 1000);
        timerCount.start();
      }
    
      public class MyCount extends CountDownTimer {
          public MyCount(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
          }
    
          @Override
          public void onFinish() {
            //some script here
          }
    
          @Override
          public void onTick(long millisUntilFinished) {
            //some script here 
          }   
        } 
    }
    
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  • 2021-02-20 18:55

    The good guys in Android thought about you.

    You have a class for that - CountDownTimer.

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  • 2021-02-20 19:12

    I am not going to write you the code for this but this should not be difficult.Just use a thread to display the value 3(using say TextView) first then sleep for say (100ms assuming you want it to change after 1 sec) then decrease it and repeat.

    An example would be

    for i=0 to 3
    print the number 
    thread.sleep(100)
    
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