Mahdi
Reputation: 6389
shamsi / Jalali Calender in Android with string parameters
i'm using this algorithm for changing Calender date to Persian calender.
here
it's work fine but:
when i want to create a new constructor for getting parameters and change a String to Persian date, like change "2012/3/6" to Persian (instead of using a Internal date) i have a very odd problem and mount mismatches by one point.
so when expect 1392/9/4 the algorithm shows 1392/8/4.
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import android.net.ParseException;
import android.util.Log;
public class ShamsiCalleder {
private class SolarCalendar {
public String strWeekDay = "";
public String strMonth = "";
int date;
int month;
int year;
public SolarCalendar(String str)
{
//SimpleDateFormat postFormater = new SimpleDateFormat("MMMM dd, yyyy");
//String newDateStr = postFormater.format(dateObj);
// for converting input date
Date MiladiDate = null;
SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd");
try {
MiladiDate = format.parse(str);
System.out.println(date);
} catch (java.text.ParseException e) {
e.printStackTrace();
}
calcSolarCalendar(MiladiDate);
}
public SolarCalendar()
{
Date MiladiDate = new Date();
Log.i("PRS", "from solarcalender="+MiladiDate);
calcSolarCalendar(MiladiDate);
}
public SolarCalendar(Date MiladiDate)
{
calcSolarCalendar(MiladiDate);
}
private void calcSolarCalendar(Date MiladiDate) {
int ld;
int miladiYear = MiladiDate.getYear() + 1900;
int miladiMonth = MiladiDate.getMonth() + 1;
int miladiDate = MiladiDate.getDate();
int WeekDay = MiladiDate.getDay();
int[] buf1 = new int[12];
int[] buf2 = new int[12];
buf1[0] = 0;
buf1[1] = 31;
buf1[2] = 59;
buf1[3] = 90;
buf1[4] = 120;
buf1[5] = 151;
buf1[6] = 181;
buf1[7] = 212;
buf1[8] = 243;
buf1[9] = 273;
buf1[10] = 304;
buf1[11] = 334;
buf2[0] = 0;
buf2[1] = 31;
buf2[2] = 60;
buf2[3] = 91;
buf2[4] = 121;
buf2[5] = 152;
buf2[6] = 182;
buf2[7] = 213;
buf2[8] = 244;
buf2[9] = 274;
buf2[10] = 305;
buf2[11] = 335;
if ((miladiYear % 4) != 0) {
date = buf1[miladiMonth - 1] + miladiDate;
if (date > 79) {
date = date - 79;
if (date <= 186) {
switch (date % 31) {
case 0:
month = date / 31;
date = 31;
break;
default:
month = (date / 31) + 1;
date = (date % 31);
break;
}
year = miladiYear - 621;
} else {
date = date - 186;
switch (date % 30) {
case 0:
month = (date / 30) + 6;
date = 30;
break;
default:
month = (date / 30) + 7;
date = (date % 30);
break;
}
year = miladiYear - 621;
}
} else {
if ((miladiYear > 1996) && (miladiYear % 4) == 1) {
ld = 11;
} else {
ld = 10;
}
date = date + ld;
switch (date % 30) {
case 0:
month = (date / 30) + 9;
date = 30;
break;
default:
month = (date / 30) + 10;
date = (date % 30);
break;
}
year = miladiYear - 622;
}
} else {
date = buf2[miladiMonth - 1] + miladiDate;
if (miladiYear >= 1996) {
ld = 79;
} else {
ld = 80;
}
if (date > ld) {
date = date - ld;
if (date <= 186) {
switch (date % 31) {
case 0:
month = (date / 31);
date = 31;
break;
default:
month = (date / 31) + 1;
date = (date % 31);
break;
}
year = miladiYear - 621;
} else {
date = date - 186;
switch (date % 30) {
case 0:
month = (date / 30) + 6;
date = 30;
break;
default:
month = (date / 30) + 7;
date = (date % 30);
break;
}
year = miladiYear - 621;
}
}
else {
date = date + 10;
switch (date % 30) {
case 0:
month = (date / 30) + 9;
date = 30;
break;
default:
month = (date / 30) + 10;
date = (date % 30);
break;
}
year = miladiYear - 622;
}
}
switch (month) {
case 1:
strMonth = "�روردين";
break;
case 2:
strMonth = "ارديبهشت";
break;
case 3:
strMonth = "خرداد";
break;
case 4:
strMonth = "تير";
break;
case 5:
strMonth = "مرداد";
break;
case 6:
strMonth = "شهريور";
break;
case 7:
strMonth = "مهر";
break;
case 8:
strMonth = "آبان";
break;
case 9:
strMonth = "آذر";
break;
case 10:
strMonth = "دي";
break;
case 11:
strMonth = "بهمن";
break;
case 12:
strMonth = "اس�ند";
break;
}
switch (WeekDay) {
case 0:
strWeekDay = "يکشنبه";
break;
case 1:
strWeekDay = "دوشنبه";
break;
case 2:
strWeekDay = "سه شنبه";
break;
case 3:
strWeekDay = "چهارشنبه";
break;
case 4:
strWeekDay = "پنج شنبه";
break;
case 5:
strWeekDay = "جمعه";
break;
case 6:
strWeekDay = "شنبه";
break;
}
}
}
public static String getCurrentShamsidate() {
Locale loc = new Locale("en_US");
ShamsiCalleder shamsi = new ShamsiCalleder();
SolarCalendar sc = shamsi.new SolarCalendar();
return String.valueOf(sc.year) + "/" + String.format(loc, "%02d",
sc.month) + "/" + String.format(loc, "%02d", sc.date);
}
public static String getCurrentShamsidate(String str) {
Locale loc = new Locale("en_US");
ShamsiCalleder shamsi = new ShamsiCalleder();
SolarCalendar sc = shamsi.new SolarCalendar(str);
Log.i("PRS", "mointh is="+sc.month);
return String.valueOf(sc.year) + "/" + String.format(loc, "%02d",
sc.month) + "/" + String.format(loc, "%02d", sc.date);
}
so when i call: ShamsiCalleder.getCurrentShamsidate()
it's returns 1392/10/4 ( it's today and just right!)
and when i call ( today): ShamsiCalleder.getCurrentShamsidate("2013/12/25")
it's returns 1392/9/4
i hope some one help me on this. with regards.
Upvotes: 4
Views: 5054
Answers (2)
Sara Zakizadeh
Reputation: 137
you can use this method like this :
public static String getPersianDate(Date d) {
GregorianCalendar gc = new GregorianCalendar();
gc.setTime(d);
int year = gc.get(Calendar.YEAR);
return getPersianDate(year, (gc.get(Calendar.MONTH)) + 1,
gc.get(Calendar.DAY_OF_MONTH));
}
I hope it can help you
Upvotes: 0
Mahdi
Reputation: 6389
ok i finally find the source of this problem.
i used to use this code for get a current date:
Calendar c = Calendar.getInstance();
int day = c.get(Calendar.DATE);
int mounth = c.get(Calendar.MONTH);
int year = c.get(Calendar.YEAR);
but i find out that the Months are Indexed from 0. so when it returns 11 it means that Dec.
so I changed code to this:
Calendar c = Calendar.getInstance();
int day = c.get(Calendar.DATE);
int mounth = c.get(Calendar.MONTH)+1;
int year = c.get(Calendar.YEAR);
thank to all my friends.
Upvotes: 2
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