CountDownTimer example

@SuppressWarnings("deprecation")
public class Example extends Activity implements OnDateSetListener, OnTimeSetListener {
    private Calendar future = Calendar.getInstance(Locale.getDefault());
    private Calendar now = Calendar.getInstance(Locale.getDefault());
    private CountDownTimer timer;
    private TextView textView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        textView = new TextView(this);
        setContentView(textView);
        showDialog(0);
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        if(id == 0)
            return new DatePickerDialog(this, this, now.get(Calendar.YEAR), now.get(Calendar.MONTH), now.get(Calendar.DAY_OF_MONTH));
        return new TimePickerDialog(this, this, now.get(Calendar.HOUR_OF_DAY), now.get(Calendar.MINUTE), true);
    }

    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
        future.set(year, monthOfYear, dayOfMonth, 0, 0, 0);
        showDialog(1);
    }

    @Override
    protected void onDestroy() {
        timer.cancel();
        super.onDestroy();
    }

    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        future.set(future.get(Calendar.YEAR), future.get(Calendar.MONTH), future.get(Calendar.DAY_OF_MONTH), hourOfDay, minute, 0);

        now.setTimeInMillis(System.currentTimeMillis());
        timer = new CountDownTimer(future.getTimeInMillis() - now.getTimeInMillis(), 1000) {
            StringBuilder time = new StringBuilder();
            @Override
            public void onFinish() {
                textView.setText(DateUtils.formatElapsedTime(0));
                //mTextView.setText("Times Up!");
            }

            @Override
            public void onTick(long millisUntilFinished) {
                time.setLength(0);
                // Use days if appropriate
                if(millisUntilFinished > DateUtils.DAY_IN_MILLIS) {
                    long count = millisUntilFinished / DateUtils.DAY_IN_MILLIS;
                    if(count > 1)
                        time.append(count).append(" days ");
                    else
                        time.append(count).append(" day ");

                    millisUntilFinished %= DateUtils.DAY_IN_MILLIS;
                }

                time.append(DateUtils.formatElapsedTime(Math.round(millisUntilFinished / 1000d)));
                textView.setText(time.toString());
            }
        }.start();
    }
}