How to detect change in time each second in Android?

Question

I am creating a custom watch face for android by following this tutorial. I have implemented broadcast receiver to detect change in time as follows:

Inside my activity I have static block to filter following intents:

static {
    intentFilter = new IntentFilter();
    intentFilter.addAction(Intent.ACTION_TIME_CHANGED);
    intentFilter.addAction(Intent.ACTION_TIME_TICK);
    intentFilter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
 }

My receiver class:

public class MyReciever extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        c = Calendar.getInstance();
        Log.d("myapp", "time changed");
        hrs = c.get(Calendar.HOUR_OF_DAY);
        min = c.get(Calendar.MINUTE);
        sec = c.get(Calendar.SECOND);

        txt_hrs.setText(String.valueOf(hrs));
        txt_mins.setText(String.valueOf(min));
        txt_sec.setText(String.valueOf(sec));
    }
}

And I have registered receiver inside oncreate():

 MyReciever myReciever = new MyReciever();
registerReceiver(myReciever,intentFilter);

Above code works fine for hours and minutes, but doesn't work for seconds.

the problem with Intent.ACTION_TIME_TICK is that it is broadcasted each minute, not second.

I need to detect change in time each second for the clock on watchface. Anyone have any solution for 'detecting time change per second'?

Answer 1

You may look why you are not getting intent after every seconds. So better is to create a separate thread or use asynctask where you need to update your textview on each one seconds.

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Or you can use Timer and TimerTask for such purpose, like below

public void updateTimeOnEachSecond() {
    Timer timer = new Timer();
    timer.schedule(new TimerTask() {

        @Override
        public void run() {
            c = Calendar.getInstance();
            Log.d("myapp", "time changed");
            hrs = c.get(Calendar.HOUR_OF_DAY);
            min = c.get(Calendar.MINUTE);
            sec = c.get(Calendar.SECOND);

            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    txt_hrs.setText(String.valueOf(hrs));
                    txt_mins.setText(String.valueOf(min));
                    txt_sec.setText(String.valueOf(sec));
                }
            });

        }
    }, 0, 1000);

}

And call this method after initialising each view from activity.