android - 获取当月过去几周的日期

Question

我试过了，但没有得到我需要的格式。

 SimpleDateFormat sdf = new SimpleDateFormat("EEEE dd-MMM-yyyy");
    for (int i = 7; i >=1; i--) {
        Calendar calendar = new GregorianCalendar();
        calendar.add(Calendar.DATE, i);
        String day = sdf.format(calendar.getTime());
        Log.i("days", day);

Wednesday 06-Dec-2017 Tuesday 05-Dec-2017 Monday 04-Dec-2017 Sunday 03-Dec-2017 Saturday 02-Dec-2017 Friday 01-Dec-2017 Thursday 30-Nov-2017

我想要这样的格式，一周的开始日期和一周的结束日期..

Oct 1-7 Oct 8-14 Oct 15-21

Answer 1

试试这段代码，

 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("", day+"<<<");
            if(i % 7 == 0){
                Log.e("", "=======week days===========");
            }
            cal.add(Calendar.DATE, 1);
        }

    }

// only previous week days get
  SimpleDateFormat sdf = new SimpleDateFormat("EEEE dd-MMM-yyyy");
        for (int i = 7; i >=1; i--) {
            Calendar calendar = new GregorianCalendar();
            calendar.add(Calendar.DATE, -i);
            String day = sdf.format(calendar.getTime());
            System.out.println(day+"<<<" );
        }