Android基于wheelView的自定义日期选择器

Android基于wheelView的自定义日期选择器系统自带的DatePicker、TimePicker大家都知道，只有这种效果:百度了很多，试了NumberPicker等都不行，本来打算自己写。

网友推荐了一个开源组件WheelView，下下来试了试，发现他已经定义的很完善了，在他的基础上拓展很容易。

现将基于wheelView自定义日期选择器记录如下：一.首先要了解WheelView为我们提供了什么：除了我写的”DateObject”与”StringWheelAdapter”，其余都是WheelView提供的，1. WheelView.java ：可滚动的组件，主要方法：setAdapter(new StringWheelAdapter(dateList, 7)); //设置AdaptersetVisibleItems(3); //设置显示几行数据setCyclic(true); //设置是否循环显示数据addChangingListener(onDaysChangedListener) //设置滑动监听器2. WheelAdapter.java : 滑动组件的适配器的接口，子类适配器用于装载数据public interface WheelAdapter {/*** Gets items count* @return the count of wheel items*/public int getItemsCount();/*** Gets a wheel item by index.** @param index the item index* @return the wheel item text or null*/public String getItem(int index);/*** Gets maximum item length. It is used to determine the wheel width.* If -1 is returned there will be used the default wheel width.** @return the maximum item length or -1*/public int getMaximumLength();}3. OnWheelChangedListener.java : 滑动监听器接口public interface OnWheelChangedListener {/*** Callback method to be invoked when current item changed* @param wheel the wheel view whose state has changed* @param oldValue the old value of current item* @param newValue the new value of current item*/void onChanged(WheelView wheel, int oldValue, int newValue);}4.OnWheelScrollListener.java ：滚动监听器接口(暂时没用到)5.NumericWheelAdapter.java : 当滚动内容为纯数字时调用的适配器6.DateObject.java : 日期实体类，用于存储、获取选择的数据package kankan.wheel.widget;import java.util.Calendar;public class DateObject extends Object{private int year ;private int month;private int day;private int week;private int hour;private int minute;private String listItem;/*** 日期对象的4个参数构造器，用于设置日期* @param year* @param month* @param day* @author sxzhang*/public DateObject(int year2, int month2, int day2,int week2) {super();this.year = year2;int maxDayOfMonth = Calendar.getInstance().getActualMaximum(Calendar.DAY_OF_MONTH);if(day2 > maxDayOfMonth){this.month = month2 + 1;this.day = day2 % maxDayOfMonth;}else{this.month = month2;this.day = day2;}this.week = week2 % 7 == 0 ? 7 : week2 % 7;if(day == Calendar.getInstance().get(Calendar.DAY_OF_MONTH)){this.listItem = String.format("%02d", this.month) +"月" + String.format("%02d", this.day) +"日"+ " 今天";}else{this.listItem = String.format("%02d", this.month) +"月" + String.format("%02d", this.day) +"日"+ getDayOfWeekCN(week);}}/*** 日期对象的2个参数构造器，用于设置时间* @param hour2* @param minute2* @param isHourType true:传入的是hour; false: 传入的是minute* @author sxzhang*/public DateObject(int hour2,int minute2,boolean isHourType) {super();if(isHourType == true && hour2 != -1){ //设置小时if(hour2 > 24){this.hour = hour2 % 24;}elsethis.hour = hour2;this.listItem = this.hour + "时";}else if(isHourType == false && minute2 != -1){ //设置分钟if(minute2 > 60)this.minute = minute2 % 60;elsethis.minute = minute2;this.listItem = this.minute + "分";}}public int getHour() {return hour;}public void setHour(int hour) {this.hour = hour;}public int getMinute() {return minute;}public void setMinute(int minute) { this.minute = minute;}public int getWeek() {return week;}public void setWeek(int week) { this.week = week;}public int getYear() {return year;}public void setYear(int year) {this.year = year;}public int getMonth() {return month;}public void setMonth(int month) { this.month = month;}public int getDay() {return day;}public void setDay(int day) {this.day = day;}public String getListItem() {return listItem;}public void setListItem(String listItem) {this.listItem = listItem;}/*** 根据day_of_week得到汉字星期* @return*/public static String getDayOfWeekCN(int day_of_week){String result = null;switch(day_of_week){case 1:result = "星期日";break;case 2:result = "星期一";break;case 3:result = "星期二";break;case 4:result = "星期三";break;case 5:result = "星期四";break;case 6:result = "星期五";break;case 7:result = "星期六";break;default:break;}return result;}}7.StringWheelAdapter.java :一会儿将定义的滚动内容为字符串的适配器，当内容为字符串时我们就可以随意拓展滑动部分的内容package kankan.wheel.widget;import java.util.ArrayList;/*** The simple String Array wheel adapter**/public class StringWheelAdapter implements WheelAdapter {/** The default items length */public static final int DEFAULT_LENGTH = -1;// itemsprivate ArrayList<DateObject> list;// lengthprivate int length;/*** Constructor* @param items the items* @param length the max items length*/public StringWheelAdapter(ArrayList<DateObject> list, int length) { this.list = list;this.length = length;}@Overridepublic String getItem(int index) {if (index >= 0 && index < list.size()) {return list.get(index).getListItem();}return null;}@Overridepublic int getItemsCount() {return list.size();}@Overridepublic int getMaximumLength() {return length;}}二.了解以后就可以使用他定义我们需要的了。