CODEWITHSUNDEEP
androidcalendarandroid-calendar
ahmad
ahmad

Reputation: 89

show weekly days of month

   public static void getWeeksOfMonth(int month, int year)
{
    SimpleDateFormat sdf = new SimpleDateFormat("EEEE dd-MMM-yyyy");
    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.YEAR, year);
    cal.set(Calendar.MONTH, month);
    cal.set(Calendar.DAY_OF_MONTH, 1);

    int ndays = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
    System.out.println(ndays+"<<<ff" );

    for (int i = 1; i <= ndays; i++)
    {
        String day = sdf.format(cal.getTime());
        System.out.println(day+"<<<" );
        Log.e("quest", day+"<<<");
        if(i % 7 == 0){
            Log.e("question", "=======week days===========");
        }
        cal.add(Calendar.DATE, 1);
    }

}

Output

Saturday 04-Nov-2017

Sunday 05-Nov-2017

Monday 06-Nov-2017

Tuesday 07-Nov-2017

=======week days===========

Wednesday 08-Nov-2017

Thursday 09-Nov-2017

Friday 10-Nov-2017

Saturday 11-Nov-2017

Sunday 12-Nov-2017

Monday 13-Nov-2017

Tuesday 14-Nov-2017

=======week days==========

Wednesday 15-Nov-2017

Thursday 16-Nov-2017

Friday 17-Nov-2017

Saturday 18-Nov-2017

Sunday 19-Nov-2017

Monday 20-Nov-2017

Tuesday 21-Nov-2017

=======week days===========

Wednesday 22-Nov-2017

Thursday 23-Nov-2017

Friday 24-Nov-2017

Saturday 25-Nov-2017

Sunday 26-Nov-2017

Monday 27-Nov-2017

Tuesday 28-Nov-2017

=======week days===========

Wednesday 29-Nov-2017

Thursday 30-Nov-2017

1:-But i want complete last week Wed to Tuesday

2:-start weeks from Friday and end with Thursday

Upvotes: 0

Views: 188

Answers (1)

Basil Bourque
Basil Bourque

Reputation: 338276

Use java.time

You are using terrible old classes, now supplanted by java.time classes.

The YearMonth class represents an entire month.

YearMonth ym = YearMonth.of( 2018 , Month.JANUARY ) ;

Define your format for the output strings. 

Locale locale = Locale.US ; 
DateTimeFormatter f = DateTimeFormatter.ofPattern( 
    "EEEE dd-MMM-uuuu" ,
    locale 
) ;

I suggest instead letting java.time automatically localize for you rather than hard-code a format. To localize, specify:

  • FormatStyle to determine how long or abbreviated should the string be.
  • Locale to determine:
    • The human language for translation of name of day, name of month, and such.
    • The cultural norms deciding issues of abbreviation, capitalization, punctuation, separators, and such.

Define formatter:

DateTimeFormatter f = DateTimeFormatter.ofLocalizedDate( 
    FormatStyle.LONG , 
    Locale.CANADA_FRENCH 
) ;

Collect into a List perhaps.

int initialCapacity = ym.lengthOfMonth() ;
List< String > outputs = new ArrayList<>( initialCapacity ) ;

Cycle through the days.

for( int i = 1 , i <= ym.lengthOfMonth() ; i ++ ) {
    LocalDate ld = ym.atDay( i ) ;
    String output = ld.format( f ) ;
    outputs.add( output ) ;
}

To group them by day-of-week, use the DayOfWeek enum.

DayOfWeek dow = ld.getDayOfWeek() ;
if ( dow.equals( DayOfWeek.WEDNESDAY ) ) { … }

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

You may exchange java.time objects directly with your database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.

Where to obtain the java.time classes?

Upvotes: 1

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