在 SQLite 中获取一周的第一天和最后一天

Question

我正在尝试获取列出一年中周数的数据库列的第一天和最后一天。我可以将所有星期都提取到一个列表中，但我想像每月的第一天和最后一天一样列出它。例如：我有一年中的“39”和“40”周。我想在“24 sep - 30 oc​​t”和“1 oct - 7 oct”之类的列表视图中显示它。

我使用此查询和 SimpleCursorAdapter 显示到列表视图中：

    String query = "SELECT _id, semana_ano, SUM(valor_uber) AS valor FROM uber_records GROUP BY semana_ano ORDER BY semana_ano";

    Cursor cursor = db.rawQuery(query, null);
    cursor.moveToFirst();

    Calendar c = Calendar.getInstance();
    c.get(Calendar.MONTH);

    String[] from = {"week_year", "value"};
    int[] to = {R.id.week,R.id.value};
    ListAdapter adapter = new SimpleCursorAdapter(ReportWeek.this,
            R.layout.report_week,
            cursor,from,to);

    listview.setAdapter(adapter);

Answer 1

试试这个：

 void getStartEndOFWeek(int enterWeek, int enterYear){
        Calendar calendar = Calendar.getInstance();
        calendar.clear();
        calendar.set(Calendar.WEEK_OF_YEAR, enterWeek);
        calendar.set(Calendar.YEAR, enterYear);

        SimpleDateFormat formatter = new SimpleDateFormat("dd MMM");
        Date startDate = calendar.getTime();
        String startDateInStr = formatter.format(startDate);

        calendar.add(Calendar.DATE, 6);
        Date enddate = calendar.getTime();
        String endDaString = formatter.format(enddate);
        String getDate = startDateInStr + " - " + endDaString;
    }