將各種日期計算合併成一個函數

Question

我有很多給出當年，本週的週數的函數 給出當年的年數減去當前周的年數並給出它們的區別的模數兩個。

我想創造出採用兩個輸入，本年度（「2013」​​），單一的方法和當前日期「26/08/2013」​​，並返回它們的差模2爲0或1。

int totalWeeks = getTotalWeeksInYear(2013); 
int currentWeeks = getcurrentweekofYear("26/08/2013"); 

private int getTotalWeeksInYear(int year) { 
    Calendar cal = Calendar.getInstance(); 
    cal.set(Calendar.YEAR, year); 
    cal.set(Calendar.MONTH, Calendar.DECEMBER); 
    cal.set(Calendar.DAY_OF_MONTH, 31); 

    int ordinalDay = cal.get(Calendar.DAY_OF_YEAR); 
    int weekDay = cal.get(Calendar.DAY_OF_WEEK) - 1; // Sunday = 0 
    int numberOfWeeks = (ordinalDay - weekDay + 10)/7; 
    System.out.println(numberOfWeeks); 
    return numberOfWeeks ; 

} 

private int getcurrentweekofYear(String week) { 
    // String dtStart = "26/10/2013"; // Input date from user 
    String dtStart = week; 
    SimpleDateFormat format = new SimpleDateFormat("dd/M/yyyy"); 
    try { 
     date = format.parse(dtStart); 
    } catch (ParseException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    Calendar calender = new GregorianCalendar(); 
    calender.setTime(date); 

    return calender.get(Calendar.WEEK_OF_YEAR) ; 
} 

int diffrence = totalWeeks - currentWeeks; 
int remainder = diffrence % 2; 
if (remainder == 0) 
{ 
    Toast.makeText(this, "current year weeks is 0", 
    Toast.LENGTH_SHORT).show();  
} 
else 
{ 
    if (remainder == 1) 
    { 
     Toast.makeText(this, "current year weeks is 1" , 
         Toast.LENGTH_SHORT).show(); 
    } 
} 

Answer 1

int result(int year, String week) { 

SimpleDateFormat format = new SimpleDateFormat("dd/M/yyyy"); 

Calendar cal1 = Calendar.getInstance(); 
cal1.set(Calendar.YEAR, year); 
cal1.set(Calendar.MONTH, Calendar.DECEMBER); 
cal1.set(Calendar.DAY_OF_MONTH, 31); 

try { 
    Date date = format.parse(week); 
} catch (ParseException e) { 
    e.printStackTrace(); 
} 

Calendar cal2 = new GregorianCalendar(); 
calender.setTime(date); 

return (((cal.get(Calendar.DAY_OF_YEAR) - (cal.get(Calendar.DAY_OF_WEEK) - 1) + 10)/7) - cal2.get(Calendar.WEEK_OF_YEAR) %2) ; 

} 

雖然我想知道，沒有任何邏輯涉及，所以你不能寫它。

Answer 2

您可以在第一個函數中使用Calendar.WEEK_OF_YEAR獲取getTotalWeeksInYear（）;

int xyz(String date){ 
    // get week of year for the above date, you will get currentWeeks 
    // Split String at '/' and get the year 
    // Create new calendar with the for December 31 and year from above splitting 
    // again get week of year , you will get totalWeeks 
    int diffrence= totalWeeks -currentWeeks; 
    int remainder = diffrence % 2; 
    Toast.makeText(this, "current year weeks is "+remainder , 
    Toast.LENGTH_SHORT).show(); 
    return remainder ; 
}