防止在时间选取器对话框片段中选择过去的日期

Question

我正在编辑文本上应用以下代码以选择日期。

public class DatePickerFragment extends DialogFragment
{
    private OnDateSetListener listener;
    public DatePickerFragment(OnDateSetListener listener)
    {
        this.listener = listener;
    }
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState)
    {
        final Calendar c = Calendar.getInstance();
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);
        int day = c.get(Calendar.DAY_OF_MONTH);
        return new DatePickerDialog(getActivity(), listener, year, month, day);
    }
}
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth)
{
    //do some stuff
}
void showDateDialog()
{
    DatePickerFragment newFragment = new DatePickerFragment(this);
    newFragment.show(getFragmentManager(), "date_picker");
}

但是，我想将所有过去的日期灰显，以便不允许用户选择其中任何一个。这可以通过代码吗？或者我应该在选择后手动检查日期是否是过去的日期？

Answer 1

使用 setMinDate(( 函数。它以毫秒为单位设置自 getDefault(( 时区中自 1970 年 1 月 1 日 00：00：00 以来的最小日期(以毫秒为单位(。将最小日期设置为今天的日期，以便用户无法超过该日期。类似于以下内容 onCreateDialog ：

final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
DatePickerDialog d = new DatePickerDialog(getActivity(), listener, year, month, day);  
DatePicker dp = d.getDatePicker(); 
dp.setMinDate(c.getTimeInMillis());
return d;

Answer 2

使用 DatePicker.setMaxDate() 和 DatePicker.setMinDate() 设置固定年份。

例如。

Calendar c_max = Calendar.getInstance(),
Calendar c_min = Calendar.getInstance();
c_min.set(2012,0,1);  // your min date boundary
c_max.set(2013,11,31); // your max date boundary
DatePicker.setMaxDate(c_max.getTimeInMillis());
DatePicker.setMinDate(c_min.getTimeInMillis());

由于 API 11 添加了setMaxDate()和setMinDate()，因此您可以对较低版本执行以下操作。

您可以使用初始化日期选择器方法设置范围。

// Calendar
this.calendar = new GregorianCalendar();
this.datePicker = (DatePicker) findViewById(R.id.your_datepicker_id);
// check for the build version
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
    // (picker is a DatePicker- set current time as min time.
    this.datePicker.setMinDate(this.calendar.getTimeInMillis());
} else {
    final int minYear = this.calendar.get(Calendar.YEAR);
    final int minMonth = this.calendar.get(Calendar.MONTH);
    final int minDay = this.calendar.get(Calendar.DAY_OF_MONTH);
    this.datePicker.init(minYear, minMonth, minDay,
            new OnDateChangedListener() {
                public void onDateChanged(DatePicker view, int year,
                        int month, int day) {
                    Calendar newDate = Calendar.getInstance();
                    newDate.set(year, month, day);
                    if (calendar.after(newDate)) {
                        view.init(minYear, minMonth, minDay, this);
                    }
                }
            });    
}

Answer 3

date button on clcik method 
   dateButton.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                showDialog(DATE_DIALOG_ID);

            }
        });

for date piker create dialog method :
case DATE_DIALOG_ID:
            {
                Calendar calendar = Calendar.getInstance();
                final DatePickerDialog dojDPDilog = new DatePickerDialog(this,datePickerListener,calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH), calendar.get(Calendar.DATE));
                     dojDPDilog.setTitle("Select Date");
                try {
                    java.lang.reflect.Field mDatePickerField = dojDPDilog.getClass().getDeclaredField("mDatePicker");
                    mDatePickerField.setAccessible(true);
                    try {
                        dojDPicker = (DatePicker) mDatePickerField.get(dojDPDilog);
                    } catch (IllegalArgumentException e) {
                        e.printStackTrace();
                    } catch (IllegalAccessException e) {
                        e.printStackTrace();
                    }
                } catch (NoSuchFieldException e) {
                    e.printStackTrace();
                }
                dojDPicker.init(minYear, minMonth, minDay,new OnDateChangedListener() {
                            @Override
                            public void onDateChanged(DatePicker view, int year,int monthOfYear, int dayOfMonth) {
                              disableDate(view, year, monthOfYear, dayOfMonth);
                              }

                        });
                return dojDPDilog;
            }  

for disable method:

      private void disableDate(DatePicker view, int year,int monthOfYear, int dayOfMonth) {
            if (year > maxYear)
            {
                view.updateDate(maxYear, maxMonth, maxDay);
            }
            else if (monthOfYear > maxMonth && year == maxYear)
            {
                view.updateDate(maxYear, maxMonth, maxDay);
            }
        else if (dayOfMonth > maxDay && year == maxYear && monthOfYear == maxMonth)
            {
                view.updateDate(maxYear, maxMonth, maxDay);
            }
            else if (year < minYear)
            {
                view.updateDate(minYear, monthOfYear, dayOfMonth);
            }
            else if (monthOfYear < minMonth && year == minYear)
            {
                view.updateDate(minYear, minMonth, dayOfMonth);
            }
        else if (dayOfMonth < minDay && year == minYear && monthOfYear == minMonth)
            {
                view.updateDate(minYear, minMonth, minDay);
            }
        }

           and take local variables:
         int maxYear = c.get(Calendar.YEAR) + 100; 
    int maxMonth = c.get(Calendar.MONTH);
    int maxDay = c.get(Calendar.DAY_OF_MONTH);
    int minYear = c.get(Calendar.YEAR);
    int minMonth = c.get(Calendar.MONTH);
    int minDay = c.get(Calendar.DAY_OF_MONTH);

Answer 4

嘿，在onDateSet((方法中尝试这个。这适用于片段。

Calendar calendar1 = Calendar.getInstance();
calendar1.set(2014,11-1,11);
view.setMinDate(calendar1.getTimeInMillis()-10000);