AndroidAPS/app/src/main/java/info/nightscout/utils/DateUtil.java

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package info.nightscout.utils;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
/**
* The Class DateUtil. A simple wrapper around SimpleDateFormat to ease the handling of iso date string <-> date obj
* with TZ
*/
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public class DateUtil {
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/**
* The date format in iso.
*/
public static String FORMAT_DATE_ISO = "yyyy-MM-dd'T'HH:mm:ss'Z'";
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/**
* Takes in an ISO date string of the following format:
* yyyy-mm-ddThh:mm:ss.ms+HoMo
*
* @param isoDateString the iso date string
* @return the date
* @throws Exception the exception
*/
public static Date fromISODateString(String isoDateString)
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throws Exception {
SimpleDateFormat f = new SimpleDateFormat(FORMAT_DATE_ISO);
f.setTimeZone(TimeZone.getTimeZone("UTC"));
Date date = f.parse(isoDateString);
return date;
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}
/**
* Render date
*
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* @param date the date obj
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* @param format - if not specified, will use FORMAT_DATE_ISO
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* @param tz - tz to set to, if not specified uses local timezone
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* @return the iso-formatted date string
*/
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public static String toISOString(Date date, String format, TimeZone tz) {
if (format == null) format = FORMAT_DATE_ISO;
if (tz == null) tz = TimeZone.getDefault();
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DateFormat f = new SimpleDateFormat(format);
f.setTimeZone(tz);
return f.format(date);
}
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public static String toISOString(Date date) {
return toISOString(date, FORMAT_DATE_ISO, TimeZone.getTimeZone("UTC"));
}
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public static String toISOString(long date) {
return toISOString(new Date(date), FORMAT_DATE_ISO, TimeZone.getTimeZone("UTC"));
}
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}