Android - Want app to perform tasks every second

Question

I\'m trying to get my countdown app to perform its function of updating my current time and date TextView and fire off its MyOnItemSelectedListener every second so that the

Answer 1

You can either use sendMessageAtTime() or postAtTime() to send yourself a message a second in the future, and handle it then.

For more information.

Answer 2

Try to use UpdateDisplay function like below:

private void updateDisplay() {
    Timer timer = new Timer();
    timer.schedule(new TimerTask() {

        @Override
        public void run() {
            Calendar c = Calendar.getInstance();
            mYear = c.get(Calendar.YEAR);
            mMonth = c.get(Calendar.MONTH);
            mDay = c.get(Calendar.DAY_OF_MONTH);
            mHour = c.get(Calendar.HOUR_OF_DAY);
            mMinute = c.get(Calendar.MINUTE);
            mSecond = c.get(Calendar.SECOND);

            cDateDisplay.setText(new StringBuilder()
                // Month is 0 based so add 1
                .append(mDay).append("/")
                .append(mMonth + 1).append("/")
                .append(mYear).append(" "));

            cTimeDisplay.setText(
                new StringBuilder()
                    .append(pad(mHour)).append(":")
                    .append(pad(mMinute)).append(":").append(pad(mSecond))
            );
        }

    },0,1000);//Update text every second
}

Finally, you must to call updateDisplay() in onCreate() function.
I hope this code would help you finish what you want !

Answer 3

To run it on the main thread:

        new Timer().schedule(new TimerTask() {
        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    yourMethodOnTheMainThread();
                }
            });
        }
    },0,10000);

Answer 4

Maybe you can also use Timer/TimerTask to fire a operation repeatedly: https://developer.android.com/reference/java/util/Timer.html