Update Time Every Second

I need to update time every second on a countdown timer which counts down to Christmas. How do I update the time in my text view.I do not have the code in the onCreate method. her

Solution 1:

Start a CountDownTimer :

long endTime = thatDay.getTimeInMillis();
newMyCountDownTimer(endTime-System.currentTimeMillis(),1000).start();

Here you go:

publicclassMyCountDownTimerextendsCountDownTimer {
publicMyCountDownTimer(long startTime, long interval) {
  super(startTime, interval);
}
@OverridepublicvoidonFinish() {
  textView.setText("Happy Christmas!");
}
@OverridepublicvoidonTick(long millis) {
  intSECOND=1000;
  intMINUTE=60 * SECOND;
  intHOUR=60 * MINUTE;
  intDAY=24 * HOUR;
  StringBuffertext=newStringBuffer();
  if (millis > DAY) {
    text.append(millis / DAY).append(" days ");
    millis %= DAY;
  }
  if (millis > HOUR) {
    text.append(millis / HOUR).append(" hours ");
    millis %= HOUR;
  }
  if (millis > MINUTE) {
    text.append(millis / MINUTE).append(" minutes ");
    millis %= MINUTE;
  }
  if (millis > SECOND) {
    text.append(millis / SECOND).append(" seconds ");
    millis %= SECOND;
  }
  textView.setText(text);
}

}

Solution 2:

import android.app.Activity;
import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

import java.util.Calendar;


publicclassMainActivityextendsActivity {

    private TextView daysBox;
    privateboolean running;
    private Calendar thatDay;

    @OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        daysBox = (TextView) findViewById(R.id.main_day);

        thatDay = Calendar.getInstance();
        thatDay.set(Calendar.DAY_OF_MONTH, 25);
        thatDay.set(Calendar.MONTH, 11); // 0-11 so 1 less
        thatDay.set(Calendar.YEAR, 2014);
        thatDay.set(Calendar.HOUR, 0);
        thatDay.set(Calendar.MINUTE, 0);
        thatDay.set(Calendar.SECOND, 0);
        thatDay.set(Calendar.AM_PM, 0);

        startDateCalculator();
    }

    protectedvoidonPause() {
        super.onPause();
        running = false;
    }

    protectedvoidonResume() {
        super.onResume();
        running = true;
    }


    privateclassCountdownTaskextendsAsyncTask<Void, Void, Void> {
        protected Void doInBackground(Void... args) {
            while (running) {
                try {
                    Thread.sleep(1000);
                } catch (Exception e) {

                }

                publishProgress();
            }
            returnnull;
        }

        protectedvoidonProgressUpdate(Void... res) {
            super.onProgressUpdate(res);

            longdiff= (thatDay.getTimeInMillis() - System.currentTimeMillis()) / 1000;
            longdays= diff / (60 * 60 * 24);
            longhours= diff / (60 * 60) % 24;
            longminutes= diff / 60 % 60;
            longseconds= diff % 60;


            daysBox.setText("" + "" + days + "d " + hours + ":" + minutes + ":" + seconds + " ");
        }
    }

    publicvoidstartDateCalculator() {

        newCountdownTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    }
}

Solution 3:

longdiff= (thatDay.getTimeInMillis() - today.getTimeInMillis()) / 1000;
  long total=diff;

            mTimer=newCountDownTimer(total, 1000) {

                 publicvoidonTick(long millisUntilFinished) {
                    diff--;  
                    daysBox.setText(convertSecondToHHMMString(diff));
                 }

                publicvoidonFinish() {
                    System.out.println("Happy Chrismas");

                 }
              }.start();


  private String convertSecondToHHMMString(long secondtTime){

     TimeZonetz= TimeZone.getTimeZone("UTC");
     SimpleDateFormatdf=newSimpleDateFormat("HH:mm:ss");
     df.setTimeZone(tz);
     Stringtime= df.format(newDate(secondtTime*1000L));

     return time;
 }