Countdown timer with pause and resume

Question

I want to do countdown timer with pause and restart.Now i am displaying countdown timer By implenting ontick() and onfinish().please help me out.HEre is th code for countdow

Answer 1

I am afraid that it is not possible to pause or stop CountDownTimer and pausing or stopping in onTick has no effect whatsoever user TimerTask instead.

Set up the TimerTask

class UpdateTimeTask extends TimerTask {
   public void run() {
       long millis = System.currentTimeMillis() - startTime;
       int seconds = (int) (millis / 1000);
       int minutes = seconds / 60;
       seconds     = seconds % 60;

       timeLabel.setText(String.format("%d:%02d", minutes, seconds));
   }

}
if(startTime == 0L) {
   startTime = evt.getWhen();
   timer = new Timer();
   timer.schedule(new UpdateTimeTask(), 100, 200);
}

You can add event listener's like this..

private Handler mHandler = new Handler();

...

OnClickListener mStartListener = new OnClickListener() {
   public void onClick(View v) {
       if (mStartTime == 0L) {
            mStartTime = System.currentTimeMillis();
            mHandler.removeCallbacks(mUpdateTimeTask);
            mHandler.postDelayed(mUpdateTimeTask, 100);
       }
   }
};

OnClickListener mStopListener = new OnClickListener() {
   public void onClick(View v) {
       mHandler.removeCallbacks(mUpdateTimeTask);
   }
};

For more refer to Android Documentation.

Answer 2

public class MainActivity extends AppCompatActivity {

TextView textView;

CountDownTimer ctimer;
boolean runCountDown;
private long leftTime;
private static final long MILL_IN_FUTURE = 6000;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    textView = findViewById(R.id.text_view);
    textView.setText("Click to start");
    textView.setOnClickListener(this::clickStartAndPauseAndResume);
    leftTime = MILL_IN_FUTURE;

}


public void clickStartAndPauseAndResume(View view) {

    if (!runCountDown) {


        long time = (leftTime == 0 || leftTime == MILL_IN_FUTURE) ? MILL_IN_FUTURE : leftTime;
        ctimer = new CountDownTimer(time, 1) {

            @Override
            public void onTick(long l) {

                leftTime = l;
                textView.setText(l + "ms");
            }

            @Override
            public void onFinish() {

                textView.setText("Done");
                leftTime = 0;
                runCountDown = false;
                textView.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        textView.setText("Click to start");
                    }
                }, 1000);
            }
        }.start();
        runCountDown = true;
    } else {
        ctimer.cancel();
        textView.setText(textView.getText() + "\n Click to resume");
        runCountDown = false;
    }
 }
}