Question

我正在为保护期开发一个功能。有一个TextView和按钮。当用户单击按钮时，日历将打开。用户从日历中选择日期，此日期将设置为该TextView。现在有另一个TextView，一个编辑文本和一个微调器。微调器有两个值：月份和年份。当用户输入一些数字值（如13）并从微调器中选择月份或年份时，应更新第二个文本视图。
我试图这样做，但如果在编辑文本中添加的月数超过12，我的概念就出错了。请帮帮我。

//Month selected
if (selecteditem.equalsIgnoreCase("Month")) {

    String ed = edit_warrenty.getText().toString();
    SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy");
    String dateInString = edit_date.getText().toString();
    Date date = null;
    try {
        date = formatter.parse(dateInString);
        System.out.println("===date===" + date);
        String date1 = formatter.format(date);
        System.out.println("===formateer.formatdate==" + date1);
    } catch (ParseException e) {
        e.printStackTrace();
    } catch (java.text.ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    Calendar c = Calendar.getInstance();
    c.setTime(date);
    int month = c.get(Calendar.MONTH) + 1;
    int day = c.get(Calendar.DAY_OF_MONTH);
    int year = c.get(Calendar.YEAR);
    c.set(month, (month + Integer.parseInt(ed)));
    int newmonth = month + Integer.parseInt(ed);
    if (newmonth <= 12) {
        c.set(newmonth, year, day);
        tvwarrentyday.setText(day + "-" + newmonth + "-" + year);
    } else {
        int in = newmonth - 12;
        int inn = month + in;
        c.set(month, (month + in));
        tvwarrentyday.setText(day + "-" + inn + "-" + year + 1);
    }
//Year selected
}else if (selecteditem.equalsIgnoreCase("Year")) {
    String ed = edit_warrenty.getText().toString();
    SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy");
    String dateInString = edit_date.getText().toString();
    Date date = null;
    try {
        date = formatter.parse(dateInString);
        System.out.println("===date===" + date);
        String date1 = formatter.format(date);
        System.out.println("===formateer.formatdate==" + date1);
    } catch (ParseException e) {
        e.printStackTrace();
    } catch (java.text.ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    Calendar c = Calendar.getInstance();
    c.setTime(date);
    int month = c.get(Calendar.MONTH) + 1;
    int day = c.get(Calendar.DAY_OF_MONTH);
    int year = c.get(Calendar.YEAR);
    c.set(year, (year + Integer.parseInt(ed)));
    int newyear = year + Integer.parseInt(ed);
    c.set(newyear, year, day);
    tvwarrentyday.setText(day + "-" + month + "-" + newyear);
} else {
    tvwarrentyday.setText("");
}

Answer 1

如果您愿意使用用户提供的数据创建一个句点，您可以在选择月份时执行类似的操作：

int newmonth = Integer.parseInt(ed);
c.add(Calendar.MONTH, newmonth);

选择年份时就像那样：

int newyear = Integer.parseInt(ed);
c.add(Calendar.YEAR, newyear);

您不必检查该值是否优于12。

根据设定日期

1 个答案: