如何在MaterialDatePicker对话框Android中设置年份限制

Question

我在找最大的麻烦。还有敏。在“材料设计数据集”对话框中，还放置“材料日期选择器”对话框的图像，其中仅显示一年。

下面的是代码

    long today = MaterialDatePicker.todayInUtcMilliseconds();
            Calendar calendar = Calendar.getInstance(TimeZone.getDefault());

              calendar.set(Calendar.MONTH, Calendar.JANUARY);
              long jan = calendar.getTimeInMillis();
                calendar.setTimeInMillis(today);


             int lastMonth = calendar.get(Calendar.MONTH);
                calendar.set(Calendar.MONTH, lastMonth);
                long dec = calendar.getTimeInMillis();


        CalendarConstraints.Builder calendarConstraintBuilder = new CalendarConstraints.Builder();
        calendarConstraintBuilder.setValidator(DateValidatorPointBackward.now());
        calendarConstraintBuilder.setStart(jan);
        calendarConstraintBuilder.setEnd(dec);

        MaterialDatePicker.Builder<Long> materialBuilder = MaterialDatePicker.Builder.datePicker();
        materialBuilder.setTitleText("Select Date Of Birth");
        materialBuilder.setSelection(today);


        materialBuilder.setCalendarConstraints(calendarConstraintBuilder.build());



        final MaterialDatePicker<Long> materialDatePicker = materialBuilder.build();
        inputEditTextDateOfBirth.setShowSoftInputOnFocus(false);

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Answer 1

对于其他读者，请注意此问题与单击月份小部件后的年份选择有关。

对于年份范围选择目的，您缺少一行：

    // set minimum year variable
    int minYear = 2010;

    // here you set the month using the "current" calendar instance
    calendar.set(Calendar.MONTH, Calendar.JANUARY);

    // but you need to also set the year of "min"
    calendar.set(Calendar.YEAR, minYear);

    // and then get a snapshot of that time.
    long jan = calendar.getTimeInMillis();

我不确定这是否完全满足了你的要求，但至少它有一年的时间。文本的显示是我使用addOnPositiveButtonClickListener测试驱动程序的一部分。

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正如我所好奇的，这也阻止了“月份选择器箭头”比“min”更早地前进：

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