Simultaneously displaying two countdown timers on two different activities

Question

I currently have a countdown timer on my second activity. What I am trying to do is set the textView on my main activity to the value of the countdown timer on my secondActivity. Here is my code for the countdown timer.

button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // put your logic here to set the time with hourPicked and minPicked variables
                timer = new CounterClass((hours * 60 * 1000) + (minutes * 1000), 1000);
                String hms = String.format(("%02d:%02d:"), hours, minutes);
                textViewTime.setText(hms);
                timer.start();
            }
        });

        noPickerHours.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                hours = newVal;
                timer = new CounterClass((hours * 60 * 1000), 1000);
                String hms = String.format(("%02d:%02d"), hours, minutes);
                textViewTime.setText(hms);
            }
        });

        noPickerMinutes.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                minutes = newVal;
                timer = new CounterClass((minutes * 1000), 1000);
                String hms = String.format(("%02d:%02d"), hours, minutes);
                textViewTime.setText(hms);
                Bundle timerBundle = new Bundle();
                timerBundle.putInt("%02d:%02d", Integer.parseInt(hms));
                Intent timerIntent = new Intent();


            }
        })
public class CounterClass 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.
     */

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



    @TargetApi(Build.VERSION_CODES.GINGERBREAD)
    @Override

    public void onTick(long millisUntilFinished) {
        long millis = millisUntilFinished;
        String hms = String.format("%02d:%02d", TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
                TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
        System.out.println(hms);
        textViewTime.setText(hms);


    }

    @Override
    public void onFinish() {

    }


}}

Adam Fręśko · Answer 1 · 2015-12-16T22:36:54.693

1

1 - Run your timer in Service or IntentService

2- Post events(messages) from service on each tick. You can accomplish that using LocalBroadcastManager or Otto. It would be good to also send event to Service requesting immediate update.

Personally i would use Otto as its so much more convenient to use.

Edit: What i mean is. Make your timer separated from Activity by placing it inside Service

Then in your onTick() method

start new Otto event and pass current counter time with it example:

public void onTick(long millisUntilFinished) {
          bus.post(new TimerTickEvent(millisUntilFinished));
}

You can listen for this Event in your Activity

@Subscribe public void eventTimerTick(TimerTickEvent event) {
    // TODO: React to the event somehow!

      event.getTimeToEnd();
}

I higly advice you to read about Otto Before using it as it requires registering on activity resum and unregistering on activity pause

edited Dec 16 '15 at 22:36

answered Dec 16 '15 at 21:00

Adam Fręśko

1,064
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14

Im not really sure how to use those in this situation could you please post some code to show how they could be used – 0xOsiris Dec 16 '15 at 22:28
Because thats external library, i gave you link to it – Adam Fręśko Dec 16 '15 at 22:47
Sry Im such a noob to programming is there any way to do it without downloading anything – 0xOsiris Dec 16 '15 at 22:49
Yes, i talked also about LocalBrodcastManager its build in to android and work very similar to Otto. But it requires a lot of setup. – Adam Fręśko Dec 16 '15 at 22:51
Would there be any way of doing this using intents – 0xOsiris Dec 16 '15 at 23:07
LocalBrodcastManager sends intents – Adam Fręśko Dec 16 '15 at 23:13
Oh alright could you post some example code using LocalBrodcastManager – 0xOsiris Dec 16 '15 at 23:15
Let me google that for you: http://stackoverflow.com/questions/8802157/how-to-use-localbroadcastmanager – Adam Fręśko Dec 16 '15 at 23:17

Simultaneously displaying two countdown timers on two different activities

1 Answers1