Question

如何让日历用户能够从current date + 4 days中选择日期。例如，如果用户提前4天直接显示日历并且无法在此之前选择日期？我使用教程中的自定义日期和时间戳，我不太确定如何做和做什么。这是onCreate for calendar

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.reservation);
    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);
                                    //+ " " + AM_PM);

                }

                @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();
                }
});

以下是CustomDateTimePicker.java

的一部分

public class CustomDateTimePicker implements OnClickListener {
private DatePicker datePicker;
private TimePicker timePicker;
private ViewSwitcher viewSwitcher;

private final int SET_DATE = 100, SET_TIME = 101, SET = 102, CANCEL = 103;

private Button btn_setDate, btn_setTime, btn_set, btn_cancel;

private Calendar calendar_date = null;

private Activity activity;

private ICustomDateTimeListener iCustomDateTimeListener = null;

private Dialog dialog;

private boolean is24HourView = true, isAutoDismiss = true;

private int selectedHour, selectedMinute;

public CustomDateTimePicker(Activity a,
    ICustomDateTimeListener customDateTimeListener) {
activity = a;
iCustomDateTimeListener = customDateTimeListener;

dialog = new Dialog(activity);
dialog.setOnDismissListener(new OnDismissListener() {
    @Override
    public void onDismiss(DialogInterface dialog) {
        resetData();
    }
});

dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
View dialogView = getDateTimePickerLayout();
dialog.setContentView(dialogView);
}

public View getDateTimePickerLayout() {
LinearLayout.LayoutParams linear_match_wrap = new LinearLayout.LayoutParams(
        LinearLayout.LayoutParams.MATCH_PARENT,
        LinearLayout.LayoutParams.MATCH_PARENT);
LinearLayout.LayoutParams linear_wrap_wrap = new LinearLayout.LayoutParams(
        LinearLayout.LayoutParams.WRAP_CONTENT,
        LinearLayout.LayoutParams.WRAP_CONTENT);
FrameLayout.LayoutParams frame_match_wrap = new FrameLayout.LayoutParams(
        FrameLayout.LayoutParams.MATCH_PARENT,
        FrameLayout.LayoutParams.WRAP_CONTENT);

LinearLayout.LayoutParams button_params = new LinearLayout.LayoutParams(
        0, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f);

LinearLayout linear_main = new LinearLayout(activity);
linear_main.setLayoutParams(linear_match_wrap);
linear_main.setOrientation(LinearLayout.VERTICAL);
linear_main.setGravity(Gravity.CENTER);

LinearLayout linear_child = new LinearLayout(activity);
linear_child.setLayoutParams(linear_wrap_wrap);
linear_child.setOrientation(LinearLayout.VERTICAL);

LinearLayout linear_top = new LinearLayout(activity);
linear_top.setLayoutParams(linear_match_wrap);

btn_setDate = new Button(activity);
btn_setDate.setLayoutParams(button_params);
btn_setDate.setText("DATE");
btn_setDate.setId(SET_DATE);
btn_setDate.setOnClickListener(this);

btn_setTime = new Button(activity);
btn_setTime.setLayoutParams(button_params);
btn_setTime.setText("TIME");
btn_setTime.setId(SET_TIME);
btn_setTime.setOnClickListener(this);

linear_top.addView(btn_setDate);
linear_top.addView(btn_setTime);

viewSwitcher = new ViewSwitcher(activity);
viewSwitcher.setLayoutParams(frame_match_wrap);

datePicker = new DatePicker(activity);
timePicker = new TimePicker(activity);
timePicker.setOnTimeChangedListener(new OnTimeChangedListener() {
    @Override
    public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
        selectedHour = hourOfDay;
        selectedMinute = minute;
    }
});

viewSwitcher.addView(timePicker);
viewSwitcher.addView(datePicker);

LinearLayout linear_bottom = new LinearLayout(activity);
linear_match_wrap.topMargin = 8;
linear_bottom.setLayoutParams(linear_match_wrap);

btn_set = new Button(activity);
btn_set.setLayoutParams(button_params);
btn_set.setText("SET");
btn_set.setId(SET);
btn_set.setOnClickListener(this);

btn_cancel = new Button(activity);
btn_cancel.setLayoutParams(button_params);
btn_cancel.setText("CANCEL");
btn_cancel.setId(CANCEL);
btn_cancel.setOnClickListener(this);

linear_bottom.addView(btn_set);
linear_bottom.addView(btn_cancel);

linear_child.addView(linear_top);
linear_child.addView(viewSwitcher);
linear_child.addView(linear_bottom);

linear_main.addView(linear_child);

return linear_main;
}

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.setMinDate(System.currentTimeMillis() - 10000);
    /*
    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;
}
}

public void setTimeIn12HourFormat(int hourIn12Format, int minute,
    boolean isAM) {
if (hourIn12Format < 13 && hourIn12Format > 0 && minute >= 0
        && minute < 60) {
    if (hourIn12Format == 12)
        hourIn12Format = 0;

    int hourIn24Format = hourIn12Format;

    if (!isAM)
        hourIn24Format += 12;

    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 = false;
}
}

public void set24HourFormat(boolean is24HourFormat) {
   is24HourView = is24HourFormat;
}

public interface ICustomDateTimeListener {
  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);

public void onCancel();
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case SET_DATE:
    btn_setTime.setEnabled(true);
    btn_setDate.setEnabled(false);
    viewSwitcher.showNext();
    break;

case SET_TIME:
    btn_setTime.setEnabled(false);
    btn_setDate.setEnabled(true);
    viewSwitcher.showPrevious();
    break;

case SET:
    if (iCustomDateTimeListener != null) {
        int month = datePicker.getMonth();
        int year = datePicker.getYear();
        int day = datePicker.getDayOfMonth();


        calendar_date.set(year, month, day, selectedHour,
                selectedMinute);

        iCustomDateTimeListener.onSet(dialog, calendar_date,
                calendar_date.getTime(), calendar_date
                        .get(Calendar.YEAR),
                getMonthFullName(calendar_date.get(Calendar.MONTH)),
                getMonthShortName(calendar_date.get(Calendar.MONTH)),
                calendar_date.get(Calendar.MONTH), calendar_date
                        .get(Calendar.DAY_OF_MONTH),
                getWeekDayFullName(calendar_date
                        .get(Calendar.DAY_OF_WEEK)),
                getWeekDayShortName(calendar_date
                        .get(Calendar.DAY_OF_WEEK)), calendar_date
                        .get(Calendar.HOUR_OF_DAY),
                getHourIn12Format(calendar_date
                        .get(Calendar.HOUR_OF_DAY)), calendar_date
                        .get(Calendar.MINUTE), calendar_date
                        .get(Calendar.SECOND), getAMPM(calendar_date));
    }
    if (dialog.isShowing() && isAutoDismiss)
        dialog.dismiss();
    break;

case CANCEL:
    if (iCustomDateTimeListener != null)
        iCustomDateTimeListener.onCancel();
    if (dialog.isShowing())
        dialog.dismiss();
    break;
}
}

public static String convertDate(String date, String fromFormat,
    String toFormat) {
try {
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat(fromFormat);
    Date d = simpleDateFormat.parse(date);
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(d);

    simpleDateFormat = new SimpleDateFormat(toFormat);
    simpleDateFormat.setCalendar(calendar);
    date = simpleDateFormat.format(calendar.getTime());

} catch (Exception e) {
    e.printStackTrace();
}

    return date;
}

private String getMonthFullName(int monthNumber) {
   Calendar calendar = Calendar.getInstance();
   calendar.set(Calendar.MONTH, monthNumber);

   SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MMMM");
   simpleDateFormat.setCalendar(calendar);
   String monthName = simpleDateFormat.format(calendar.getTime());

   return monthName;
}

private String getMonthShortName(int monthNumber) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.MONTH, monthNumber);

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MMM");
simpleDateFormat.setCalendar(calendar);
String monthName = simpleDateFormat.format(calendar.getTime());

return monthName;
}

private String getWeekDayFullName(int weekDayNumber) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, weekDayNumber);

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("EEEE");
simpleDateFormat.setCalendar(calendar);
String weekName = simpleDateFormat.format(calendar.getTime());

return weekName;
}

private String getWeekDayShortName(int weekDayNumber) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, weekDayNumber);

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("EE");
simpleDateFormat.setCalendar(calendar);
String weekName = simpleDateFormat.format(calendar.getTime());

return weekName;
}

private int getHourIn12Format(int hour24) {
int hourIn12Format = 0;

if (hour24 == 0)
    hourIn12Format = 12;
else if (hour24 <= 12)
    hourIn12Format = hour24;
else
    hourIn12Format = hour24 - 12;

return hourIn12Format;
}

private String getAMPM(Calendar calendar) {
String ampm = (calendar.get(Calendar.AM_PM) == (Calendar.AM)) ? "AM"
        : "PM";
return ampm;
}

private void resetData() {
  calendar_date = null;
is24HourView = true;
}

public static String pad(int integerToPad) {
if (integerToPad >= 10 || integerToPad < 0)
    return String.valueOf(integerToPad);
else
    return "0" + String.valueOf(integerToPad);
}

}

更新：我收到了错误

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

错误说

CustomDateTimePicker类型中的方法setDate（Calendar）不适用于参数（长）

LogCat错误

11-24 05:18:12.196: E/AndroidRuntime(1338): Process: com.reserveme, PID: 1338
11-24 05:18:12.196: E/AndroidRuntime(1338): java.lang.IllegalArgumentException: fromDate: Mon Nov 24 05:18:11 EST 2014 does not precede toDate: Mon Nov 24 05:18:08 EST 2014

在android datepicker中将最小日期设置为当前日期+一天

0 个答案: