Android中DateTimePicker的实现

stackoverflow当中关于DateTimePicker问题的答案的改进版

stackoverflow问题地址：http://stackoverflow.com/questions/2055509/datetime-picker-in-android-application

本例子采用的方案雏形：https://github.com/krishjlk/android-date-and-time-picker-dialog-example-sample

UI示例：

代码：

package com.yang.datetimepicker;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import android.app.Activity;import android.app.Dialog;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;import android.widget.DatePicker;import android.widget.TimePicker;public class DateTimePickerDialog implements OnClickListener {private DatePicker datePicker;private TimePicker timePicker;private Button btn_set, btn_cancel;private Calendar calendar_date = null;private Activity activity;private ICustomDateTimeListener iCustomDateTimeListener = null;private Dialog dialog;private boolean is24HourView = true;public DateTimePickerDialog(Activity a,ICustomDateTimeListener customDateTimeListener) {activity = a;iCustomDateTimeListener = customDateTimeListener;dialog = new Dialog(activity);dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);View dialogView = getDateTimePickerLayout();dialog.setContentView(dialogView);}public View getDateTimePickerLayout() {View view = View.inflate(activity, R.layout.datetime_picker_dialog, null);datePicker = (DatePicker) view.findViewById(R.id.datePicker);timePicker = (TimePicker) view.findViewById(R.id.timePicker);btn_set = (Button)view.findViewById(R.id.btn_set);btn_set.setOnClickListener(this);btn_cancel =(Button)view.findViewById(R.id.btn_cancel);btn_cancel.setOnClickListener(this);return view;}public void showDialog() {if (!dialog.isShowing()) {if (calendar_date == null)calendar_date = Calendar.getInstance();timePicker.setIs24HourView(is24HourView);timePicker.setCurrentHour(calendar_date.get(Calendar.HOUR_OF_DAY));timePicker.setCurrentMinute(calendar_date.get(Calendar.MINUTE));datePicker.updateDate(calendar_date.get(Calendar.YEAR),calendar_date.get(Calendar.MONTH),calendar_date.get(Calendar.DATE));dialog.show();}}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(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();}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.btn_set:if (dialog.isShowing())dialog.dismiss();if (iCustomDateTimeListener != null) {int month = datePicker.getMonth();int year = datePicker.getYear();int day = datePicker.getDayOfMonth();calendar_date.set(year, month, day);int hourOfDay = timePicker.getCurrentHour().intValue();int minute = timePicker.getCurrentMinute().intValue();calendar_date.set(year, month, day, hourOfDay, minute);iCustomDateTimeListener.onSet(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));}resetData();break;case R.id.btn_cancel:if (dialog.isShowing())dialog.dismiss();if (iCustomDateTimeListener != null)iCustomDateTimeListener.onCancel();resetData();break;}}/** * @param date *            date in String * @param fromFormat *            format of your <b>date</b> eg: if your date is 2011-07-07 *            09:09:09 then your format will be <b>yyyy-MM-dd hh:mm:ss</b> * @param toFormat *            format to which you want to convert your <b>date</b> eg: if *            required format is 31 July 2011 then the toFormat should be *            <b>d MMMM yyyy</b> * @return formatted date */public static String convertDate(String date, String fromFormat,String toFormat) {String formattedDate = "";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);formattedDate = simpleDateFormat.format(calendar.getTime());} catch (Exception e) {if (e != null)e.printStackTrace();}return formattedDate;}/** * @param monthNumber *            Month Number starts with 0. For <b>January</b> it is <b>0</b> *            and for <b>December</b> it is <b>11</b>. * @return */private String getMonthFullName(int monthNumber) {String monthName = "";if (monthNumber >= 0 && monthNumber < 12)try {Calendar calendar = Calendar.getInstance();calendar.set(Calendar.MONTH, monthNumber);SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MMMM");simpleDateFormat.setCalendar(calendar);monthName = simpleDateFormat.format(calendar.getTime());} catch (Exception e) {if (e != null)e.printStackTrace();}return monthName;}/** * @param monthNumber *            Month Number starts with 0. For <b>January</b> it is <b>0</b> *            and for <b>December</b> it is <b>11</b>. * @return */private String getMonthShortName(int monthNumber) {String monthName = "";if (monthNumber >= 0 && monthNumber < 12)try {Calendar calendar = Calendar.getInstance();calendar.set(Calendar.MONTH, monthNumber);SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MMM");simpleDateFormat.setCalendar(calendar);monthName = simpleDateFormat.format(calendar.getTime());} catch (Exception e) {if (e != null)e.printStackTrace();}return monthName;}/** * @param weekDayNumber *            Week Number starts with 1. For <b>Sunday</b> it is <b>1</b> *            and for <b>Saturday</b> it is <b>7</b>. * @return */private String getWeekDayFullName(int weekDayNumber) {String weekName = "";if (weekDayNumber > 0 && weekDayNumber < 8) {try {Calendar calendar = Calendar.getInstance();calendar.set(Calendar.DAY_OF_WEEK, weekDayNumber);SimpleDateFormat simpleDateFormat = new SimpleDateFormat("EEEE");simpleDateFormat.setCalendar(calendar);weekName = simpleDateFormat.format(calendar.getTime());} catch (Exception e) {if (e != null)e.printStackTrace();}}return weekName;}/** * @param weekDayNumber *            Week Number starts with 1. For <b>Sunday</b> it is <b>1</b> *            and for <b>Saturday</b> it is <b>7</b>. * @return */private String getWeekDayShortName(int weekDayNumber) {String weekName = "";if (weekDayNumber > 0 && weekDayNumber < 8) {try {Calendar calendar = Calendar.getInstance();calendar.set(Calendar.DAY_OF_WEEK, weekDayNumber);SimpleDateFormat simpleDateFormat = new SimpleDateFormat("EE");simpleDateFormat.setCalendar(calendar);weekName = simpleDateFormat.format(calendar.getTime());} catch (Exception e) {if (e != null)e.printStackTrace();}}return weekName;}private int getHourIn12Format(int hour24) {int hourIn12Format = 0;if (hour24 == 0)hourIn12Format = 12;else if (hour24 <= 12)hourIn12Format = hour24;elsehourIn12Format = 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 i) {return i <= 9 ? "0" + i : "" + i;}public static String getSecondsFromMillis(long milliseconds) {return "" + ((int) ((milliseconds / 1000) % 60));}public static String getMinutesFromMillis(long milliseconds) {return "" + (int) ((milliseconds / (1000 * 60)) % 60);}public static String getHoursFromMillis(long milliseconds) {return "" + (int) ((milliseconds / (1000 * 60 * 60)) % 24);}/** * @param monthNumber *            Month Number starts with 0. For <b>January</b> it is <b>0</b> *            and for <b>December</b> it is <b>11</b>. * @param year * @return */public static int getDaysInMonth(int monthNumber, int year) {int days = 0;if (monthNumber >= 0 && monthNumber < 12) {try {Calendar calendar = Calendar.getInstance();int date = 1;calendar.set(year, monthNumber, date);days = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);} catch (Exception e) {if (e != null)e.printStackTrace();}}return days;}/** * @param monthNumber *            Month Number starts with 0. For <b>January</b> it is <b>0</b> *            and for <b>December</b> it is <b>11</b>. * @return */public static int getDaysInMonthInPresentYear(int monthNumber) {int days = 0;if (monthNumber >= 0 && monthNumber < 12) {try {Calendar calendar = Calendar.getInstance();int date = 1;int year = calendar.get(Calendar.YEAR);calendar.set(year, monthNumber, date);days = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);} catch (Exception e) {if (e != null)e.printStackTrace();}}return days;}public static int getDaysDifference(Date fromDate, Date toDate) {if (fromDate == null || toDate == null)return 0;return (int) ((toDate.getTime() - fromDate.getTime()) / (1000 * 60 * 60 * 24));}public static int getDaysDifference(Calendar calendar1, Calendar calendar2) {if (calendar1 == null || calendar2 == null)return 0;return (int) ((calendar2.getTimeInMillis() - calendar1.getTimeInMillis()) / (1000 * 60 * 60 * 24));}}