Android(安卓)UTC和Local 时间互转

public static String getUTCFromLocalTime_(int hour, int minute, int second) {        StringBuffer UTCTimeBuffer = new StringBuffer();        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm");        // 1、取得本地时间：        Calendar cal = Calendar.getInstance();        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), hour, minute, second);        // 2、取得时间偏移量：        int zoneOffset = cal.get(java.util.Calendar.ZONE_OFFSET);        // 3、取得夏令时差：        int dstOffset = cal.get(java.util.Calendar.DST_OFFSET);        Log.d("xxx", "getUTCFromLocalTime ZONE_OFFSET : " + zoneOffset                + " ,DST_OFFSET: " + dstOffset                + ",TimeZone:" + TimeZone.getDefault()                + ",Local:" + Locale.getDefault());        // 4、从本地时间里扣除这些差量，即可以取得UTC时间：        cal.add(java.util.Calendar.MILLISECOND, -(zoneOffset + dstOffset));        int yearCal = cal.get(Calendar.YEAR);        int monthCal = cal.get(Calendar.MONTH);        int dayCal = cal.get(Calendar.DAY_OF_MONTH);        int hourCal = cal.get(Calendar.HOUR_OF_DAY);        int minuteCal = cal.get(Calendar.MINUTE);        int secondCal = cal.get(Calendar.SECOND);        UTCTimeBuffer                .append(yearCal)                .append("-")                .append(monthCal)                .append("-")                .append(dayCal)                .append(" ")                .append(hourCal < 10 ? ("0" + hourCal) : hourCal)                .append(":")                .append(minuteCal < 10 ? ("0" + minuteCal) : minuteCal)                .append(":")                .append(secondCal);        try {            format.parse(UTCTimeBuffer.toString());            Log.i("", "UTC time-->" + UTCTimeBuffer.toString());            return UTCTimeBuffer.toString();        } catch (Exception e) {            e.printStackTrace();        }        return null;    }    public static String getLocalTimeFromUTC_(int hour, int minute, int second) {        StringBuffer UTCTimeBuffer = new StringBuffer();        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm");        // 1、取得本地时间：        Calendar cal = Calendar.getInstance();        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), hour, minute, second);        // 2、取得时间偏移量：        int zoneOffset = cal.get(java.util.Calendar.ZONE_OFFSET);        // 3、取得夏令时差：        int dstOffset = cal.get(java.util.Calendar.DST_OFFSET);        Log.d("xxx", "getUTCFromLocalTime ZONE_OFFSET : " + zoneOffset                + " ,DST_OFFSET: " + dstOffset                + ",TimeZone:" + TimeZone.getDefault()                + ",Local:" + Locale.getDefault());        // 4、从UTC时间里加上这些差量，即可以取得本地时间：        cal.add(java.util.Calendar.MILLISECOND, (zoneOffset + dstOffset));//        System.out.println("p: " + cal.getTimeInMillis());//        System.out.println("UTC:" + new Date(cal.getTimeInMillis()));        int yearCal = cal.get(Calendar.YEAR);        int monthCal = cal.get(Calendar.MONTH);        int dayCal = cal.get(Calendar.DAY_OF_MONTH);        int hourCal = cal.get(Calendar.HOUR_OF_DAY);        int minuteCal = cal.get(Calendar.MINUTE);        int secondCal = cal.get(Calendar.SECOND);        UTCTimeBuffer                .append(yearCal)                .append("-")                .append(monthCal)                .append("-")                .append(dayCal)                .append(" ")                .append(hourCal < 10 ? ("0" + hourCal) : hourCal)                .append(":")                .append(minuteCal < 10 ? ("0" + minuteCal) : minuteCal)                .append(":")                .append(secondCal);        try {            format.parse(UTCTimeBuffer.toString());            Log.i("", "localTime:" + UTCTimeBuffer.toString());            return UTCTimeBuffer.toString();        } catch (Exception e) {            e.printStackTrace();        }        return null;    }

以下转载：https://blog.csdn.net/Burn_yourself/article/details/71195241

 /**     * 当地时间 ---> UTC时间     * @return     */    public static String Local2UTC(){        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        sdf.setTimeZone(TimeZone.getTimeZone("gmt"));        String gmtTime = sdf.format(new Date());        return gmtTime;    }    /**     * 任意时间---> UTC时间     * @return     */    public static String Local2UTC(String localTime){        SimpleDateFormat localFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//当地时间格式        localFormater.setTimeZone(TimeZone.getDefault());        Date gpsLocalDate = null;        try {            gpsLocalDate = localFormater.parse(localTime);        } catch (ParseException e) {            e.printStackTrace();        }        SimpleDateFormat utcFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//UTC时间格式        utcFormater.setTimeZone(TimeZone.getTimeZone("UTC"));        String UTCTime = utcFormater.format(gpsLocalDate.getTime());        return UTCTime;    }    /**     * UTC时间 ---> 当地时间     * @param utcTime   UTC时间     * @return     */    public static String utc2Local(String utcTime) {        SimpleDateFormat utcFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//UTC时间格式        utcFormater.setTimeZone(TimeZone.getTimeZone("UTC"));        Date gpsUTCDate = null;        try {            gpsUTCDate = utcFormater.parse(utcTime);        } catch (ParseException e) {            e.printStackTrace();        }        SimpleDateFormat localFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//当地时间格式        localFormater.setTimeZone(TimeZone.getDefault());        String localTime = localFormater.format(gpsUTCDate.getTime());        return localTime;    }

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