MaterialDateTimePicker MinDate，MaxDate杂志

Question

MaterialDateTimePicker库在DateTime应用程序中用作DateTime选择器。需要禁用之前和以后的日期，以便在日历中只显示3天，即。昨天，今天和明天。一切正常，除了选定的日期是一个月前。例如，在选择今天(16-05-2017年)时，它会提前一个月(15-04-2017年)。它显示的是一个月前的日期，而不是返回的一天。代码：

calendar = Calendar.getInstance();

        Year = calendar.get(Calendar.YEAR) ;
        Month = calendar.get(Calendar.MONTH);
        Day = calendar.get(Calendar.DAY_OF_MONTH);

        final Calendar maxDate = Calendar.getInstance();
        maxDate.set(Calendar.DAY_OF_MONTH, maxDate.get(Calendar.DAY_OF_MONTH) + 1);
        maxDate.set(Calendar.MONTH, Month);
        maxDate.set(Calendar.YEAR, Year);

        final Calendar minDate = Calendar.getInstance();
        minDate.set(Calendar.DAY_OF_MONTH, Day - 1);
        minDate.set(Calendar.MONTH, Month);
        minDate.set(Calendar.YEAR, Year);


        mDojBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                datePickerDialog = DatePickerDialog.newInstance(TrainStatus.this, Year, Month, Day);
                datePickerDialog.setThemeDark(false);
                datePickerDialog.showYearPickerFirst(false);
                datePickerDialog.setAccentColor(Color.parseColor("#009688"));
                datePickerDialog.setTitle("Select Date");
                datePickerDialog.setMinDate(minDate);
                datePickerDialog.setMaxDate(maxDate);

                datePickerDialog.show(getFragmentManager(), "DatePickerDialog");

            }
        });

@Override
    public void onDateSet(DatePickerDialog view, int Year, int Month, int Day) {
        dateSelected = String.valueOf(Year)+String.valueOf(Month)+String.valueOf(Day);

    }

任何帮助都是appreciated.Thanks预先提供的。

Answer 1

 You should add month +1. because here month starts from zero(0).

dateSelected = String.valueOf(Year)+String.valueOf(Month +1)+String.valueOf(Day);


Or

   final Calendar calendar = Calendar.getInstance();
            int yy = calendar.get(Calendar.YEAR);
            int mm = calendar.get(Calendar.MONTH);
            int dd = calendar.get(Calendar.DAY_OF_MONTH);

            dialog = DatePickerDialog.newInstance(new DatePickerDialog.OnDateSetListener() {
                @Override
                public void onDateSet(DatePickerDialog view, int year, int monthOfYear, int dayOfMonth) {
                    month = monthOfYear;
                    day = dayOfMonth;
                    TextView tv = (TextView) v1.findViewById(R.id.txtDate);
                    tv.setText(new StringBuilder().append(day).append("-")
                            .append((month + 1)).append("-").append(year));
                }
            }, yy, mm, dd);

            dialog.setMinDate(calendar);

Answer 2

https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html

检查官方文档中的日历类，月份从0开始。这意味着0=一月和11=december。