Pilldroid/app/src/main/java/net/foucry/pilldroid/UtilDate.java

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Java
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package net.foucry.pilldroid;
import android.util.Log;
import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* Created by jacques on 05/05/16.
*/
public class UtilDate {
/**
*
* @param aDate
* @return date
*
* set date time at Noon
*/
public static Date dateAtNoon(Date aDate) {
Log.d(MedicamentListActivity.Constants.TAG, "dateAtNoon " + aDate);
Calendar calendar = Calendar.getInstance();
calendar.setTime(aDate);
calendar.set(Calendar.HOUR_OF_DAY, 12);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
return calendar.getTime();
}
/**
*
* @param days
* @param date
* @return date
*
* Substract days to date and return a new date
*/
public static Date removeDaysToDate(int days, Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_YEAR, -days);
return calendar.getTime();
}
/**
*
* @param date
* @return String
*
* Convert a date to a String using a SimpleDateFormat
*/
public static String date2String(Date date, DateFormat dateFormat) {
Log.d(MedicamentListActivity.Constants.TAG, "date == " + date);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return dateFormat.format(calendar.getTime());
}
/**
*
* @param dateString
* @return date
*
* Convert String date into Date
*/
public static Date string2Date(String dateString) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
ParsePosition pos = new ParsePosition(0);
return dateFormat.parse(dateString,pos);
}
/**
*
* @param date
* @return int
*
* Number of days between date (older than today) and today
*/
public static int nbOfDaysBetweenDateAndToday(Date date) {
Date oldDate = dateAtNoon(date); // Be sure that the old date is at Noon
Date todayDate = dateAtNoon(new Date()); // Be sure that we use today at Noon
return (int) (todayDate.getTime() - oldDate.getTime());
}
}