無法在Java Android中為Datpicker設置最小值和最大值

Question

卡住了如何使用DatePicker設置最小和最大日期，因此，例如，用戶無法通過當前日期設置日期。 同樣，用戶將無法選擇1960年之前的日期，到目前為止，我已經能夠設置DatePicker，其代碼如下：

 public class MainActivity extends FragmentActivity {

        EditText mEdit;
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }

        public void selectDate(View view) {
            DialogFragment newFragment = new SelectDateFragment();
            newFragment.show(getSupportFragmentManager(), "DatePicker");
        }
        public void populateSetDate(int year, int month, int day) {
            mEdit = (EditText)findViewById(R.id.editText1);
            mEdit.setText(month+"/"+day+"/"+year);
        }
        public class SelectDateFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {
            @Override
            public Dialog onCreateDialog(Bundle savedInstanceState) {
                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);
                return new DatePickerDialog(getActivity(), this, yy, mm, dd);
            }

            public void onDateSet(DatePicker view, int yy, int mm, int dd) {
                populateSetDate(yy, mm+1, dd);
            }
        }

    }

Answer 1

在DatePickerDialog中，有兩種方法可以設置最小和最大日期 ，以輸入時間為毫秒

揀選機的最小日期

揀選機的最大日期

所以代碼會像

DatePickerDialog d = new DatePickerDialog(getActivity(), this, yy, mm, dd);
DatePicker dp = d.getDatePicker();
dp.setMaxDate(maxDate);
dp.setMinDate(minDate);
return d;

但是此方法在API級別11中可用。

Answer 2

您可以嘗試以下類似方法。

public class DatePickerDialogWithMaxMinRange extends DatePickerDialog {

 static int maxYear=2014;  // max date which you want to set
 static int maxMonth=11;
 static int maxDay=31;

 int minYear=1960;        // min date which you want to set
 int minMonth=0;
 int minDay=1;


public DatePickerDialogWithMaxMinRange(Context context,  OnDateSetListener callBack,int minYear,int minMonth,int minDay,int maxYear,int maxMonth,int maxDay) {
    super(context,callBack, maxYear, maxMonth, maxDay);
    this.minDay = minDay;
    this.minMonth = minMonth;
    this.minYear = minYear;
    DatePickerDialogWithMaxMinRange.maxDay = maxDay;
    DatePickerDialogWithMaxMinRange.maxMonth = maxMonth;
    DatePickerDialogWithMaxMinRange.maxYear = maxYear;
}

@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
    super.onDateChanged(view, year, monthOfYear, dayOfMonth);

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