同一对话框上的日期时间选择器不接受minDate和maxDate

Question

我以前在谷歌的同一个对话框上找到了日期和时间选择器的教程。我试图在日历上设置minDate和maxDate，但没有任何帮助。我想在用户打开对话框时选择日期，默认日期为当前日期前4天。为此我想

datePicker.setMinDate(System.currentTimeMillis() + 4);

但当我打开对话框时，什么都没有改变。代码有点长，我会尽量只发布我认为需要的内容。这是CustomDateTimePicker。java

public void showDialog() {
if (!dialog.isShowing()) {
    if (calendar_date == null)
        calendar_date = Calendar.getInstance();

    selectedHour = calendar_date.get(Calendar.HOUR_OF_DAY);
    selectedMinute = calendar_date.get(Calendar.MINUTE);

    timePicker.setIs24HourView(is24HourView);
    timePicker.setCurrentHour(selectedHour);
    timePicker.setCurrentMinute(selectedMinute);

    //
    datePicker.updateDate(calendar_date.get(Calendar.YEAR),
            calendar_date.get(Calendar.MONTH),
            calendar_date.get(Calendar.DATE));


    dialog.show();

    btn_setDate.performClick();
}
}

public void setAutoDismiss(boolean isAutoDismiss) {
    this.isAutoDismiss = isAutoDismiss;
}

public void dismissDialog() {
   if (!dialog.isShowing())
      dialog.dismiss();
 }

public void setDate(Calendar calendar) {
   if (calendar != null)
    calendar_date = calendar;
}

 public void setDate(Date date) {
   if (date != null) {
    calendar_date = Calendar.getInstance();
    calendar_date.setTime(date);
  }
 }

 public void setDate(int year, int month, int day) {
   if (month < 12 && month >= 0 && day < 32 && day >= 0 && year > 100
        && year < 3000) {
    calendar_date = Calendar.getInstance();
    calendar_date.set(year, month, day);

  }

 }

 public void setTimeIn24HourFormat(int hourIn24Format, int minute) {
 if (hourIn24Format < 24 && hourIn24Format >= 0 && minute >= 0
        && minute < 60) {
    if (calendar_date == null)
        calendar_date = Calendar.getInstance();

    calendar_date.set(calendar_date.get(Calendar.YEAR),
            calendar_date.get(Calendar.MONTH),
            calendar_date.get(Calendar.DAY_OF_MONTH), hourIn24Format,
            minute);

    is24HourView = true;
  }
}

这是在主活动中

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    custom = new CustomDateTimePicker(this,
            new CustomDateTimePicker.ICustomDateTimeListener() {

                @Override
                public void onSet(Dialog dialog, Calendar calendarSelected,
                        Date dateSelected, int year, String monthFullName,
                        String monthShortName, int monthNumber, int date,
                        String weekDayFullName, String weekDayShortName,
                        int hour24, int hour12, int min, int sec,
                        String AM_PM) {
                    ((EditText) findViewById(R.id.datePicker)).setText(calendarSelected.get(Calendar.DAY_OF_MONTH)
                                    + "-" + (monthNumber+1) + "-" + year
                                    + " " + hour24 + ":" + min);              
                }

                @Override
                public void onCancel() {

                }
            });

    /**
     * Pass Directly current time format it will return AM and PM if you set
     * false
     */
    custom.set24HourFormat(false);
    /**
     * Pass Directly current data and time to show when it pop up
     */
    custom.setDate(Calendar.getInstance());

    findViewById(R.id.btnCalendar).setOnClickListener(
            new OnClickListener() {

                @Override
                public void onClick(View v) {                       
                    custom.showDialog();
                }

});           

我相信这是我需要修复的部分，但无法得到它的准确程度。如果需要，这里是CustomDateTimePicker的完整代码。java-

Answer 1

datePicker.setMinDate(System.currentTimeMillis() + 4);

您将向当前时间添加4毫秒并将其作为minDate传递。要解决这个问题，您必须将4天转换为毫秒并将其添加到当前时间中。