Android Utililty Methods Long to Date Convert

return utcMillis - getTimeZoneOffsetInMillis();

String dateStr2 = date;
ParsePosition pos2 = new ParsePosition(0);
SimpleDateFormat formatter2 = new SimpleDateFormat("yyyy-MM-dd");
Date strtodate2 = formatter2.parse(dateStr2, pos2);
long dateLong2 = strtodate2.getTime();
return dateLong2;

SimpleDateFormat format = new SimpleDateFormat("mm");
StringBuilder dateString = new StringBuilder(
        format.format(dateTimeMillis));
return Integer.parseInt(dateString.toString());

Calendar c = Calendar.getInstance();
c.setTimeInMillis(milliseconds);
int hours = c.get(Calendar.HOUR);
int ampm = c.get(Calendar.AM_PM);
if (ampm == Calendar.PM) {
    hours += 12;
int minutes = c.get(Calendar.MINUTE);
...

SimpleDateFormat format = new SimpleDateFormat("MM");
StringBuilder dateString = new StringBuilder(
        format.format(dateTimeMillis));
return Integer.parseInt(dateString.toString()) - 1;

Date date = new Date(time);
SimpleDateFormat dateFormat = new SimpleDateFormat(
        DATE_TIME_FORMAT_DCIM_FilENAME);
return dateFormat.format(date);

Date date = new Date(time);
SimpleDateFormat dateFormat = new SimpleDateFormat(
        DATE_TIME_FORMAT_DCIM_FilENAME);
return dateFormat.format(date);

if (sThenTime == null) {
    sThenTime = new Time();
sThenTime.set(date1);
int day1 = Time.getJulianDay(date1, sThenTime.gmtoff);
sThenTime.set(date2);
int day2 = Time.getJulianDay(date2, sThenTime.gmtoff);
return Math.abs(day2 - day1);
...

return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS", Locale.US)
        .format(new Date(timeStamp));

long millisecondsLeft = timeUsageMs % 1000;
if (timeUsageMs == millisecondsLeft) {
    return millisecondsLeft + "ms";
long seconds = timeUsageMs / 1000;
long secondsLeft = seconds % 60;
if (secondsLeft == seconds) {
    return secondsLeft + "s" + millisecondsLeft + "ms";
...