CODEWITHSUNDEEP
androidtimercountdowntimer
Ashish Yadav
Ashish Yadav

Reputation: 3

I want to create a countdown timer and as soon as the timer finishes i want a another countdown timer to run

new CountDownTimer(30000, 1000) {

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

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

this helps me create a timer but how can i create a timer as soon as the above timer finishes and generate a notification when the timer finishes

Upvotes: 0

Views: 431

Answers (3)

The-null-Pointer-
The-null-Pointer-

Reputation: 369

This should work fine

package com.stackoverflow.example;

import android.os.CountDownTimer;

/**
 * @author aminu on 5/7/2016.
 */
public class CountDownTimerHelper {

    private int numOfRuns;
    private long millisInFuture, countDownInterval;


    private CountDownTimerHelper(int numOfRuns, long millisInFuture, long countDownInterval) {
        //you may check for invalid arguments here like negative intervals

        this.numOfRuns = numOfRuns;
        this.millisInFuture = millisInFuture;
        this.countDownInterval = countDownInterval;
    }

    private void tryRun() {
        if (numOfRuns-- > 0) {
            new CountDownTimerImpl(millisInFuture, countDownInterval).start();
        }
    }


    public static void startCountDownTimers(int numOfRuns, long millisInFuture, long countDownInterval) {
        new CountDownTimerHelper(numOfRuns, millisInFuture, countDownInterval).tryRun();
    }

    private class CountDownTimerImpl extends CountDownTimer {
        /**
         * @param millisInFuture    The number of millis in the future from the call
         *                          to {@link #start()} until the countdown is done and {@link #onFinish()}
         *                          is called.
         * @param countDownInterval The interval along the way to receive
         *                          {@link #onTick(long)} callbacks.
         */
        private CountDownTimerImpl(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

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

        @Override
        public void onFinish() {
            //notify user countdown ended by showing toast or something like that

            //mTextField.setText("done " + "remaining " + numOfRuns + ");

            tryRun();
        }

    }
}

then to use it just do CountDownTimerHelper.startCountDownTimers(numOfRuns,yourDuration,yourInterval)

example CountDownTimerHelper.startCountDownTimers(5,15000,1000) //this will run 5 successive countdowntimers with duration 15 seconds and interval 1 second

Upvotes: 0

Dhaval
Dhaval

Reputation: 2874

First : Make a class that extends CountDownTimer

public class SecondTimer extends CountDownTimer{

        public SecondTimer(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onTick(long millisUntilFinished) {

        }

        @Override
        public void onFinish() {
        //Generate notification here
        }
    }

Second : Initialize the instance of that class

SecondTimer secondTimer = new SecondTimer(5000,1000);

Third : Start SecondTimer when First timer stops

public class FirstTimer extends CountDownTimer{

        public SecondTimer(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onTick(long millisUntilFinished) {

        }

        @Override
        public void onFinish() {
        secondTimer.start();
        }
    }


FirstTimer firstTimer = new FirstTimer(5000,1000);
firstTimer.start();

Upvotes: 1

Geosearchef
Geosearchef

Reputation: 648

You shouldn't define the CountDownTimer as an anonymous class, but instead in its own file. Then you could just call: new CountDownTimer(30000, 1000) to start it in the onFinish() method of the previous one. Foer the notification, you could e. g. use Toasts or Snackbars.

Upvotes: 0

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