안드로이드 커스텀 달력 만들기 - CalendarHelper

CalendarHelper Class 를 생성하여 양력/음력 변환, 음력/양력 변환, 한달의 마지막날짜 구하기 등을 하는 메소드를 구현한다.

package com.link2me.android.util; import com.ibm.icu.util.ChineseCalendar; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; public class CalendarHelper {     /**      * 음력날짜를 양력날짜로 변환      * @param 음력날짜 (yyyyMMdd)      * @return 양력날짜 (yyyyMMdd)      */     public static String Lunar2Solar(String yyyymmdd) {         ChineseCalendar cc = new ChineseCalendar();         Calendar cal = Calendar.getInstance();         if (yyyymmdd == null)             return "";         String date = yyyymmdd.trim();         if (date.length() != 8) {             if (date.length() == 4)                 date = date + "0101";             else if (date.length() == 6)                 date = date + "01";             else if (date.length() > 8)                 date = date.substring(0, 8);             else                 return "";         }         cc.set(ChineseCalendar.EXTENDED_YEAR, Integer.parseInt(date.substring(0, 4)) + 2637);         cc.set(ChineseCalendar.MONTH, Integer.parseInt(date.substring(4, 6)) - 1);         cc.set(ChineseCalendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)));         cal.setTimeInMillis(cc.getTimeInMillis());         int y = cal.get(Calendar.YEAR);         int m = cal.get(Calendar.MONTH) + 1;         int d = cal.get(Calendar.DAY_OF_MONTH);         StringBuffer ret = new StringBuffer();         ret.append(String.format("%04d", y));         ret.append(String.format("%02d", m));         ret.append(String.format("%02d", d));         return ret.toString();     }     /**      * 양력날짜를 음력날짜로 변환      * @param 양력날짜 (yyyyMMdd)      * @return 음력날짜 (yyyyMMdd)      */     public static String Solar2Lunar(String yyyymmdd) {         ChineseCalendar cc = new ChineseCalendar();         Calendar cal = Calendar.getInstance();         if (yyyymmdd == null)             return "";         String date = yyyymmdd.trim() ;         if( date.length() != 8 ) {             if( date.length() == 4 )                 date = date + "0101" ;             else if( date.length() == 6 )                 date = date + "01" ;             else if( date.length() > 8 )                 date = date.substring(0,8) ;             else                 return "" ;         }         cal.set( Calendar.YEAR, Integer.parseInt(date.substring(0,4)) ) ;         cal.set( Calendar.MONTH, Integer.parseInt(date.substring(4,6))-1 ) ;         cal.set( Calendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)) ) ;         cc.setTimeInMillis( cal.getTimeInMillis() ) ;         // ChinessCalendar.YEAR 는 1~60 까지의 값만 가지고 ,         // ChinessCalendar.EXTENDED_YEAR 는 Calendar.YEAR 값과 2637 만큼의 차이를 가진다.         int y = cc.get(ChineseCalendar.EXTENDED_YEAR)-2637 ;         int m = cc.get(ChineseCalendar.MONTH)+1 ;         int d = cc.get(ChineseCalendar.DAY_OF_MONTH) ;         StringBuffer ret = new StringBuffer() ;         if( y < 1000 )          ret.append( "0" ) ;         else if( y < 100 )      ret.append( "00" ) ;         else if( y < 10 )       ret.append( "000" ) ;         ret.append( y ) ;         if( m < 10 ) ret.append( "0" ) ;         ret.append( m ) ;         if( d < 10 ) ret.append( "0" ) ;         ret.append( d ) ;         return ret.toString() ;     }     public static int WeekendValue(String date) throws ParseException {         SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");         Calendar cal = Calendar.getInstance();         cal.setTime(sdf.parse(date));         return cal.get(Calendar.DAY_OF_WEEK);         // Calendar.SUNDAY : 1         // Calendar.SATURDAY : 7     }     /**      * 양력날짜의 요일을 리턴      * @param 양력날짜 (yyyyMMdd)      * @return 요일(int)      */     public static int getDayOfWeek(String day) {         int y = Integer.parseInt(day.substring(0, 4));         int m = Integer.parseInt(day.substring(4, 6)) - 1;         int d = Integer.parseInt(day.substring(6));         Calendar c = Calendar.getInstance();         c.set(y, m, d);         return c.get(Calendar.DAY_OF_WEEK);     }     public static String Sol2Lun(String year, String month, String day) {         ChineseCalendar cc = new ChineseCalendar();         Calendar cal = Calendar.getInstance();         if (year == null || month == null || day == null)             return "";         cal.set( Calendar.YEAR, Integer.parseInt(year) ) ;         cal.set( Calendar.MONTH, Integer.parseInt(month)) ;         cal.set( Calendar.DAY_OF_MONTH, Integer.parseInt(day)) ;         cc.setTimeInMillis( cal.getTimeInMillis() ) ;         // ChinessCalendar.YEAR 는 1~60 까지의 값만 가지고 ,         // ChinessCalendar.EXTENDED_YEAR 는 Calendar.YEAR 값과 2637 만큼의 차이를 가진다.         int y = cc.get(ChineseCalendar.EXTENDED_YEAR)-2637 ;         int m = cc.get(ChineseCalendar.MONTH)+1 ;         int d = cc.get(ChineseCalendar.DAY_OF_MONTH) ;         StringBuffer ret = new StringBuffer() ;         if( y < 1000 )          ret.append( "0" ) ;         else if( y < 100 )      ret.append( "00" ) ;         else if( y < 10 )       ret.append( "000" ) ;         ret.append( y ) ;         if( m < 10 ) ret.append( "0" ) ;         ret.append( m ) ;         if( d < 10 ) ret.append( "0" ) ;         ret.append( d ) ;         return ret.toString().substring(4,6)+"."+ret.toString().substring(6,8);     }     // 해당 달의 첫 요일을 구해서 돌려줌.     private static int getStartDay(int year, int month) {         int monthSum = 0;         int leapYear = 0;         int daySum = 1;         for (int i = 1; i < year; i++) {             monthSum += 365;             if (isLeapYear(i) == true) {                 leapYear += 1;             }         }         for (int j = 1; j < month; j++) {             daySum += getLastDay(year, j);         }         return (monthSum + leapYear + daySum) % 7;     }     // 달의 마지막 일을 구함     public static int getLastDay(int month, int year) {         if (month == 4 || month == 6 || month == 9 || month == 11) {             return 30;         } else if (month == 2 && isLeapYear(year) == true) {             return 29;         } else if (month == 2 && isLeapYear(year) == false) {             return 28;         } else {             return 31;         }     }     // 해당 년도가 윤년인지 판별     private static boolean isLeapYear(int year) {         return (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0));     } }

CalendarHelper 수정본

package com.link2me.android.util; import com.ibm.icu.util.ChineseCalendar; import com.link2me.android.item.Holidays_Item; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.HashMap; public class CalendarHelper {     static HashMap<String, Holidays_Item> holidaysArrayList = new HashMap<String,Holidays_Item>();     /**      * 음력날짜를 양력날짜로 변환      * @param 음력날짜 (yyyyMMdd)      * @return 양력날짜 (yyyyMMdd)      */     public static String Lunar2Solar(String yyyymmdd) {         ChineseCalendar cc = new ChineseCalendar();         Calendar cal = Calendar.getInstance();         if (yyyymmdd == null)             return "";         String date = yyyymmdd.trim();         if (date.length() != 8) {             if (date.length() == 4)                 date = date + "0101";             else if (date.length() == 6)                 date = date + "01";             else if (date.length() > 8)                 date = date.substring(0, 8);             else                 return "";         }         cc.set(ChineseCalendar.EXTENDED_YEAR, Integer.parseInt(date.substring(0, 4)) + 2637);         cc.set(ChineseCalendar.MONTH, Integer.parseInt(date.substring(4, 6)) - 1);         cc.set(ChineseCalendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)));         cal.setTimeInMillis(cc.getTimeInMillis());         int y = cal.get(Calendar.YEAR);         int m = cal.get(Calendar.MONTH) + 1;         int d = cal.get(Calendar.DAY_OF_MONTH);         StringBuffer ret = new StringBuffer();         ret.append(String.format("%04d", y));         ret.append(String.format("%02d", m));         ret.append(String.format("%02d", d));         return ret.toString();     }     /**      * 양력날짜를 음력날짜로 변환      * @param 양력날짜 (yyyyMMdd)      * @return 음력날짜 (yyyyMMdd)      */     public static String Solar2Lunar(String yyyymmdd) {         ChineseCalendar cc = new ChineseCalendar();         Calendar cal = Calendar.getInstance();         if (yyyymmdd == null)             return "";         String date = yyyymmdd.trim() ;         if( date.length() != 8 ) {             if( date.length() == 4 )                 date = date + "0101" ;             else if( date.length() == 6 )                 date = date + "01" ;             else if( date.length() > 8 )                 date = date.substring(0,8) ;             else                 return "" ;         }         cal.set( Calendar.YEAR, Integer.parseInt(date.substring(0,4)) ) ;         cal.set( Calendar.MONTH, Integer.parseInt(date.substring(4,6))-1 ) ;         cal.set( Calendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6)) ) ;         cc.setTimeInMillis( cal.getTimeInMillis() ) ;         // ChinessCalendar.YEAR 는 1~60 까지의 값만 가지고 ,         // ChinessCalendar.EXTENDED_YEAR 는 Calendar.YEAR 값과 2637 만큼의 차이를 가진다.         int y = cc.get(ChineseCalendar.EXTENDED_YEAR)-2637 ;         int m = cc.get(ChineseCalendar.MONTH)+1 ;         int d = cc.get(ChineseCalendar.DAY_OF_MONTH) ;         StringBuffer ret = new StringBuffer() ;         if( y < 1000 )          ret.append( "0" ) ;         else if( y < 100 )      ret.append( "00" ) ;         else if( y < 10 )       ret.append( "000" ) ;         ret.append( y ) ;         if( m < 10 ) ret.append( "0" ) ;         ret.append( m ) ;         if( d < 10 ) ret.append( "0" ) ;         ret.append( d ) ;         return ret.toString() ;     }     public static HashMap<String,Holidays_Item> holidayArray(String yyyy){         holidaysArrayList.clear(); // 데이터 초기화         // 양력 휴일         addHolidaysItem(yyyy,"0101" ,"신정");         addHolidaysItem(yyyy,"0301" ,"삼일절");         addHolidaysItem(yyyy,"0505" ,"어린이날");         addHolidaysItem(yyyy,"0606" ,"현충일" );         addHolidaysItem(yyyy,"0815" ,"광복절");         addHolidaysItem(yyyy,"1003" ,"개천절");         addHolidaysItem(yyyy,"1009" ,"한글날");         addHolidaysItem(yyyy,"1225" ,"성탄절");         // 음력 휴일         String prev_seol = String.valueOf(Integer.parseInt(Lunar2Solar(yyyy+"0101")) -1);         addHolidaysItem(yyyy,prev_seol.substring(4) ,"");         addHolidaysItem(yyyy,SolarDays(yyyy, "0101"),"설날");         addHolidaysItem(yyyy,SolarDays(yyyy, "0102"),"");         addHolidaysItem(yyyy,SolarDays(yyyy, "0408"),"석탄일");         addHolidaysItem(yyyy,SolarDays(yyyy, "0814"),"");         addHolidaysItem(yyyy,SolarDays(yyyy, "0815"),"추석");         addHolidaysItem(yyyy,SolarDays(yyyy, "0816"),"");         try {             // 어린이날 대체공휴일 검사 : 어린이날은 토요일, 일요일인 경우 그 다음 평일을 대체공유일로 지정             int childDayChk = WeekendValue(yyyy+"0505");             if(childDayChk == 1) addHolidaysItem(yyyy,"0506" ,"대체공휴일");             if(childDayChk == 7) addHolidaysItem(yyyy,"0507" ,"대체공휴일");             // 설날 대체공휴일 검사             if(WeekendValue(Lunar2Solar(yyyy+"0101"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0103"),"대체공휴일");             if(WeekendValue(Lunar2Solar(yyyy+"0101"))==2) addHolidaysItem(yyyy,SolarDays(yyyy, "0103"),"대체공휴일");             if(WeekendValue(Lunar2Solar(yyyy+"0102"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0103"),"대체공휴일");             // 추석 대체공휴일 검사             if(WeekendValue(Lunar2Solar(yyyy+"0814"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0817"),"대체공휴일");             if(WeekendValue(Lunar2Solar(yyyy+"0815"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0817"),"대체공휴일");             if(WeekendValue(Lunar2Solar(yyyy+"0816"))==1) addHolidaysItem(yyyy,SolarDays(yyyy, "0817"),"대체공휴일");         } catch (ParseException e) {             e.printStackTrace();         }         //Collections.sort(holidaysArrayList); // 오름차순 정렬         return holidaysArrayList;     }     private static String SolarDays(String yyyy, String date){         return Lunar2Solar(yyyy+date).substring(4);     }     private static void addHolidaysItem(String year, String date, String name ){         Holidays_Item item = new Holidays_Item();         item.setYear(year);         item.setDate(date);         item.setName(name);         holidaysArrayList.put(date,item);     }     public static int WeekendValue(String date) throws ParseException {         SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");         Calendar cal = Calendar.getInstance();         cal.setTime(sdf.parse(date));         return cal.get(Calendar.DAY_OF_WEEK);         // Calendar.SUNDAY : 1         // Calendar.SATURDAY : 7     }     /**      * 양력날짜의 요일을 리턴      * @param 양력날짜 (yyyyMMdd)      * @return 요일(int)      */     public static int getDayOfWeek(String day) {         int y = Integer.parseInt(day.substring(0, 4));         int m = Integer.parseInt(day.substring(4, 6)) - 1;         int d = Integer.parseInt(day.substring(6));         Calendar c = Calendar.getInstance();         c.set(y, m, d);         return c.get(Calendar.DAY_OF_WEEK);     }     public static String Sol2Lun(String year, String month, String day) {         ChineseCalendar cc = new ChineseCalendar();         Calendar cal = Calendar.getInstance();         if (year == null || month == null || day == null)             return "";         cal.set( Calendar.YEAR, Integer.parseInt(year) ) ;         cal.set( Calendar.MONTH, Integer.parseInt(month)) ;         cal.set( Calendar.DAY_OF_MONTH, Integer.parseInt(day)) ;         cc.setTimeInMillis( cal.getTimeInMillis() ) ;         // ChinessCalendar.YEAR 는 1~60 까지의 값만 가지고 ,         // ChinessCalendar.EXTENDED_YEAR 는 Calendar.YEAR 값과 2637 만큼의 차이를 가진다.         int y = cc.get(ChineseCalendar.EXTENDED_YEAR)-2637 ;         int m = cc.get(ChineseCalendar.MONTH)+1 ;         int d = cc.get(ChineseCalendar.DAY_OF_MONTH) ;         StringBuffer ret = new StringBuffer() ;         if( y < 1000 )          ret.append( "0" ) ;         else if( y < 100 )      ret.append( "00" ) ;         else if( y < 10 )       ret.append( "000" ) ;         ret.append( y ) ;         if( m < 10 ) ret.append( "0" ) ;         ret.append( m ) ;         if( d < 10 ) ret.append( "0" ) ;         ret.append( d ) ;         return ret.toString().substring(4,6)+"."+ret.toString().substring(6,8);     }     // 해당 달의 첫 요일을 구해서 돌려줌.     private static int getStartDay(int year, int month) {         int monthSum = 0;         int leapYear = 0;         int daySum = 1;         for (int i = 1; i < year; i++) {             monthSum += 365;             if (isLeapYear(i) == true) {                 leapYear += 1;             }         }         for (int j = 1; j < month; j++) {             daySum += getLastDay(year, j);         }         return (monthSum + leapYear + daySum) % 7;     }     // 달의 마지막 일을 구함     public static int getLastDay(int month, int year) {         if (month == 4 || month == 6 || month == 9 || month == 11) {             return 30;         } else if (month == 2 && isLeapYear(year) == true) {             return 29;         } else if (month == 2 && isLeapYear(year) == false) {             return 28;         } else {             return 31;         }     }     // 해당 년도가 윤년인지 판별     private static boolean isLeapYear(int year) {         return (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0));     } }