最近有需要用户可以通过日历选择时间去预定，并且还要显示阴历日期节日等的需求，找了很多相关的开源的也没有发现类似功能的，有的是只有公历日期没有阴历，有的带有阴历的代码又看不懂（有些一句注释都没有，看的我蓝瘦香菇啊。。。 ( ╯□╰ )），没办法于是打算自己动手来写这样的功能。还是先来看一下效果图吧：
先来说说我的思路，我把它拆成了很多块，包括 该日历的整体界面，日历的单个月的界面，日历的单个月的行界面，以及单个日期的界面，类结构如下（看到名字大家应该清楚了），然后通过不断地new 进行嵌套进去，从而形成了现在看到的这样的布局：
这样做产生了一个严重的问题，就是程序第一次跑起来非常的卡，而且我担心GC会回收其中的View，从而造成BUG。但基本功能还是没多大问题，日期也是准确的。由于能力有限，这是我目前能想到的方法了，也希望各位看官能给我提供一些意见，小弟在此谢谢了（源码在最后。。。）。
再来说回代码上来，其中CellViewInstance.class 是用来替换用户当前点击后的CellView，点击之后进行状态切换。目前只做了单选的操作，你也可以在里面做多选事件的操作。LunarCalendar.class是用来根据公历日期来计算阴历日期，可以返回公历节日，阴历日期、节日、以及24节气。该方法是在网上找到的，做了一点点修改。
现在贴上主要代码,基本都有注释（顺序按布局从大到小 ----CustomCalendarView --> CalendarMonthView----> CalendarRowView ---> CalendarCellView ---> CellViewInstance）：
CustomCalendarView.class:
public class CustomCalendarView extends RelativeLayout{
/**
* 展示的月份数量，默认为3（包含当前月份的三个月）
*/
private static int showMonths = 3;
private Context context;
protected LinearLayout weekStrLl;
protected LinearLayout monthViewLl;
private String[] weekString = new String[]{"日","一", "二", "三", "四", "五", "六"};
public CustomCalendarView(Context context) {
super(context);
this.context = context;
init();
}
private void init() {
View calendarView = LayoutInflater.from(context).inflate(R.layout.custom_calendar_view,this);
weekStrLl = (LinearLayout) calendarView.findViewById(R.id.calendar_view_week_ll);
monthViewLl = (LinearLayout) calendarView.findViewById(R.id.calendar_view_month_ll);
//设置顶部日期展示
for(String week : weekString){
TextView textView = new TextView(context);
textView.setTextSize(22);
if(week.equals("日") || week.equals("六")){
textView.setTextColor(Color.parseColor("#44CDC5"));
}else{
textView.setTextColor(Color.parseColor("#333333"));
}
textView.setText(week);
textView.setLayoutParams(new RelativeLayout.LayoutParams(CalendarActivity3.screenWidth / 7,
ViewGroup.LayoutParams.MATCH_PARENT));
textView.setGravity(Gravity.CENTER);
weekStrLl.addView(textView);
}
//计算当前年月
Calendar mCalendar = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy年MM月");
for(int i = 0 ; i < showMonths ; i++){
if(i == 0){
mCalendar.add(Calendar.MONTH,0);
}else{
mCalendar.add(Calendar.MONTH,1);
}
String curDate = dateFormat.format(mCalendar.getTime());
monthViewLl.addView(new CalendarMonthView(context,curDate));
}
}
}j接下来是 CalendarMonthView.class
public class CalendarMonthView extends RelativeLayout {
private Context context;
private LinearLayout monthLl;
private TextView curMonthTv;
//根据日期去绘制一个月
protected String curYearMonthStr;
public CalendarMonthView(Context context, String curYearMonthStr) {
super(context);
this.context = context;
this.curYearMonthStr = curYearMonthStr;
init();
}
private void init() {
View monthView = LayoutInflater.from(context).inflate(R.layout.calendar_month_view, this);
monthLl = (LinearLayout) monthView.findViewById(R.id.calendar_month_ll);
curMonthTv = (TextView) monthView.findViewById(R.id.calendar_month_tv);
curMonthTv.setText(curYearMonthStr);
//获得当月的天数
int days = CalendarUtils.curMonthDays(curYearMonthStr);
//第一行往旁边空出的格子数
int startBlankCells = 0;
//最后一行往旁边空出的格子数
int endBlankCells = 0;
try {
//根据当月的第一天是星期几去算左边空出的格子数量
int week = TimeUtils.dayForWeek(curYearMonthStr);
startBlankCells = week % 7;
} catch (Exception e) {
e.printStackTrace();
}
//计算当月总的需要行数
int mLines = (days + startBlankCells) / 7;
//判断是否有余数
int restDays = (days + startBlankCells) % 7;
if (restDays > 0) {
endBlankCells = 7 - restDays;
//有的话行数加一
mLines += 1;
}
//添加行以及数据
//根据当月天数设置日期数据
int date = 1;
for (int i = 0; i < mLines; i++) {
CalendarRowView rowView;
List<Integer> dateList = new ArrayList<>();
//第一行是特殊行，单独拿出来
if (i == 0) {
for(int j = 0 ;j < 7 ; j ++){
if(j < startBlankCells){
dateList.add(0);
}else{
dateList.add(date);
date ++;
}
}
rowView = new CalendarRowView(context,dateList,curYearMonthStr, startBlankCells, CalendarRowView.START_TAG);
} else if (i < mLines - 1) {
//绘制中间行
//添加中间行日期
for(int j = 0 ;j < 7 ; j ++){
dateList.add(date);
date ++;
}
rowView = new CalendarRowView(context,dateList,curYearMonthStr);
} else {
//最后一行也是特殊行，单独拿出来
//最后一行日期
for(int j = 0 ;j < 7 ; j ++){
if((7 - j) <= endBlankCells){
dateList.add(0);
}else{
dateList.add(date);
date ++;
}
}
rowView = new CalendarRowView(context,dateList,curYearMonthStr, endBlankCells, CalendarRowView.END_TAG);
}
monthLl.addView(rowView);
}
}
}
CalendarRowView.class
public class CalendarRowView extends RelativeLayout {
private Context context;
private LinearLayout rowLl;
//往旁边空出几格
private int blankCells;
//起始处空出标识
public static int START_TAG = 0x110;
//结束处空出标识
public static int END_TAG = 0x111;
private int blankTag;
private List<Integer> dataList;
private String curYearMonthStr;
public CalendarRowView(Context context,List<Integer> dataList,String curYearMonthStr) {
super(context);
this.context = context;
this.dataList = dataList;
this.curYearMonthStr = curYearMonthStr;
init();
}
public CalendarRowView(Context context,List<Integer> dataList,String curYearMonthStr,int blankCells,int blankTag) {
super(context);
this.context = context;
this.dataList = dataList;
this.curYearMonthStr = curYearMonthStr;
this.blankCells = blankCells;
this.blankTag = blankTag;
init();
}
private void init() {
View rowView = LayoutInflater.from(context).inflate(R.layout.calendar_row_view,this);
rowLl = (LinearLayout) rowView.findViewById(R.id.calendar_row_ll);
for(int i =0 ; i < 7 ; i ++){
CalendarCellView cellView;
int date = dataList.get(i);
if(blankCells != 0){
if(blankTag == START_TAG){
//第一行
cellView = new CalendarCellView(context,date,curYearMonthStr,true);
blankCells --;
}else{
//最后一行,如果剩余的格子个数小于等于空白的数量则绘制空白
if((7 - i) <= blankCells){
cellView = new CalendarCellView(context,date,curYearMonthStr,true);
}else{
cellView = new CalendarCellView(context,date,curYearMonthStr);
}
}
}else{
cellView = new CalendarCellView(context,date,curYearMonthStr);
}
cellView.setLayoutParams(new LayoutParams(CalendarActivity3.screenWidth / 7,
CalendarActivity3.screenWidth / 7));
rowLl.addView(cellView);
}
}
}
CanlendarCellView.class
public class CalendarCellView extends RelativeLayout {
private Context context;
private TextView gregorianTv;
private RelativeLayout gregorianRl;
private TextView lunarTv;
//当前cell选中状态
private boolean isSelected;
//当前cell能否被选中
private boolean notBeChoosen;
//为true则不显示布局
private boolean isNull;
private int date;
private String curYearMonthStr;
private CalendarCellView curCellView;
public CalendarCellView(Context context,int date,String curYearMonthStr) {
super(context);
this.context = context;
this.date = date;
this.curYearMonthStr = curYearMonthStr;
curCellView = this;
init();
}
public CalendarCellView(Context context,int date,String curYearMonthStr,boolean isNull) {
super(context);
this.context = context;
this.date = date;
this.curYearMonthStr = curYearMonthStr;
this.isNull = isNull;
curCellView = this;
init();
}
private void init(){
View cellView = LayoutInflater.from(context).inflate(R.layout.calendar_cell_view,this);
gregorianTv = (TextView) cellView.findViewById(R.id.calendar_cell_gregorian_tv);
lunarTv = (TextView) cellView.findViewById(R.id.calendar_cell_lunar_tv);
gregorianRl = (RelativeLayout) cellView.findViewById(R.id.calendar_cell_gregorian_rl);
if(isNull){
gregorianTv.setVisibility(GONE);
lunarTv.setVisibility(GONE);
notBeChoosen = true;
}else{
gregorianTv.setText(String.valueOf(date));
final String curDate = curYearMonthStr + date +"日";
//如果日期是今天的话设为选中
if(curDate.equals(TimeUtils.getCurrentDate())){
CellViewInstance.setCellView(curCellView);
gregorianTv.setBackgroundResource(R.drawable.ic_blue_round_border_bg);
}
//
if(CellViewInstance.isCanBeChosen()){
curCellView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
CellViewInstance.setCellView(curCellView);
Toast.makeText(context,curDate,Toast.LENGTH_SHORT).show();
}
});
}
LunarCalendar lunarCalendar = LunarCalendar.getInstance();
lunarCalendar.set(curDate);
if(!lunarCalendar.getSolarFestival().equals("")){
//设置公历节日
lunarTv.setText(lunarCalendar.getSolarFestival());
}else if(!lunarCalendar.getLunarFestival().equals("")){
//设置阴历节日
lunarTv.setText(lunarCalendar.getLunarFestival());
}else if(!lunarCalendar.getSolarTerms().equals("")){
//设置24节气
lunarTv.setText(lunarCalendar.getSolarTerms());
}else{
//设置普通阴历日期
lunarTv.setText(lunarCalendar.getLunarDate());
lunarTv.setTextColor(Color.parseColor("#6D6D6D"));
}
}
}
/**
* 设为选中
*/
public void setChecked(){
if(!isSelected){
gregorianTv.setTextColor(Color.parseColor("#FFFFFF"));
gregorianRl.setBackgroundResource(R.drawable.ic_blue_round_bg);
isSelected = true;
}
}
/**
* 设为未被选中
*/
public void setUnChecked(){
if(isSelected){
gregorianTv.setTextColor(Color.parseColor("#333333"));
gregorianRl.setBackgroundColor(Color.TRANSPARENT);
isSelected = false;
}
}
/**
* 设置公历日期
*/
public void setGregorianStr(String gregorianStr){
gregorianTv.setText(gregorianStr);
}
/**
* 设置阴历日期
*/
public void setLunarStr(String lunarStr){
lunarTv.setText(lunarStr);
}
}
CellViewInstance.class
/**
* Created by fySpring
* Date : 2016/12/29
* To do :cellView 全局操作类，供用户点击操作,点击一次将其替换，也可作多选操作
*/
public class CellViewInstance {
private static CalendarCellView cellView;
//判断当前cell能否被选中
private static boolean canBeChosen;
public static CalendarCellView getCellView() {
return cellView;
}
public static void setCellView(CalendarCellView cellView) {
//如果为空则说明第一次进入该方法，表示为今天
if(CellViewInstance.cellView == null){
canBeChosen = true;
}else{
CellViewInstance.cellView.setUnChecked();
canBeChosen = false;
}
CellViewInstance.cellView = cellView;
CellViewInstance.cellView.setChecked();
}
public static boolean isCanBeChosen() {
return canBeChosen;
}
//当界面退出后清空instance
public static void clearInstance(){
CellViewInstance.cellView = null;
canBeChosen = false;
}
}
根据公历日期计算阴历日期的类 LunarCalendar.class
public class LunarCalendar {
private int lyear;
private int lmonth;
private int lday;
private boolean leap;
private int yearCyl, monCyl, dayCyl;
/**
* 公历节气
*/
private String solarTerms = "";
/**
* 公历节日
*/
private String solarFestival = "";
/**
* 农历节日
*/
private String lunarFestival = "";
/**
* 农历日期
*/
private String lunarDate = "";
private Calendar baseDate = Calendar.getInstance();
private Calendar offDate = Calendar.getInstance();
private SimpleDateFormat chineseDateFormat = new SimpleDateFormat("yyyy年MM月dd日");
final static long[] lunarInfo = new long[] { 0x04bd8, 0x04ae0, 0x0a570,
0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,
0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0,
0x0ada2, 0x095b0, 0x14977, 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50,
0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566,
0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0,
0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4,
0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0, 0x0b550,
0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950,
0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260,
0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0,
0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,
0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40,
0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0, 0x074a3,
0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960,
0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0,
0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9,
0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954, 0x06aa0,
0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65,
0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0,
0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0, 0x055b2,
0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0 };
final static String[] Gan = new String[] { "甲", "乙", "丙", "丁", "戊", "己",
"庚", "辛", "壬", "癸" };
final static String[] Zhi = new String[] { "子", "丑", "寅", "卯", "辰", "巳",
"午", "未", "申", "酉", "戌", "亥" };
final static String[] Animals = new String[] { "鼠", "牛", "虎", "兔", "龙",
"蛇", "马", "羊", "猴", "鸡", "狗", "猪" };
final static String[] SolarTerm = new String[] { "小寒", "大寒", "立春", "雨水",
"惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至", "小暑", "大暑", "立秋",
"处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至" };
final static long[] STermInfo = new long[] { 0, 21208, 42467, 63836, 85337,
107014, 128867, 150921, 173149, 195551, 218072, 240693, 263343,
285989, 308563, 331033, 353350, 375494, 397447, 419210, 440795,
462224, 483532, 504758 };
final static String chineseMonthNumber[] = { "正", "二", "三", "四", "五", "六",
"七", "八", "九", "十", "冬", "腊" };
final static String chineseNumber[] =
{ "一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二" };
final static String[] sFtv = new String[] {"0101*元旦",
"0214 情人节", "0308 妇女节", "0312 植树节", "0401 愚人节",
"0501*劳动节", "0504 青年节", "0512 护士节", "0601 儿童节",
"0626 反毒品日","0701 建党节", "0801 建军节", "0910 教师节",
"1001*国庆节", "1031 万圣节", "1128 感恩节", "1225 圣诞节" };
final static String[] lFtv = { "0101*春节", "0115 元宵", "0505 端午",
"0707 七夕", "0815 中秋", "0909 重阳", "1208 腊八", "1223 小年",
"0100*除夕" };
final static String[] wFtv = { "0521 母亲节", "0631 父亲节" };//每年6月第3个星期日是父亲节,5月的第2个星期日是母亲节
//星期日是一个周的第1天第3个星期日也就是第3个完整周的第一天
//
private LunarCalendar() {
baseDate.setMinimalDaysInFirstWeek(7);//设置一个月的第一个周是一个完整周
}
/**
* 获得实例
* @return
*/
public static LunarCalendar getInstance() {
return new LunarCalendar();
}
final private static int lYearDays(int y)//====== 传回农历 y年的总天数
{
int i, sum = 348;
for (i = 0x8000; i > 0x8; i >>= 1) {
if ((lunarInfo[y - 1900] & i) != 0)
sum += 1;
}
return (sum + leapDays(y));
}
final private static int leapDays(int y)//====== 传回农历 y年闰月的天数
{
if (leapMonth(y) != 0) {
if ((lunarInfo[y - 1900] & 0x10000) != 0)
return 30;
else
return 29;
} else
return 0;
}
final private static int leapMonth(int y)//====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
{
return (int) (lunarInfo[y - 1900] & 0xf);
}
final public static int monthDays(int y, int m)//====== 传回农历 y年m月的总天数
{
if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
return 29;
else
return 30;
}
final private static String AnimalsYear(int y)//====== 传回农历 y年的生肖
{
return Animals[(y - 4) % 12];
}
final private static String cyclical(int num)//====== 传入 的offset 传回干支,
// 0=甲子
{
return (Gan[num % 10] + Zhi[num % 12]);
}
// ===== 某年的第n个节气为几日(从0小寒起算)
final private int sTerm(int y, int n) {
offDate.set(1900, 0, 6, 2, 5, 0);
long temp = offDate.getTime().getTime();
offDate.setTime(new Date((long) ((31556925974.7 * (y - 1900) + STermInfo[n] * 60000L) + temp)));
return offDate.get(Calendar.DAY_OF_MONTH);
}
/**
* 传出y年m月d日对应的农历.
* @param curDate 例如 2016年12月29日
*/
private void CalculateLunarCalendar(String curDate) {
int leapMonth;
int y = 0;
int m = 0;
int d = 0;
try {
baseDate.setTime(chineseDateFormat.parse("1900年1月31日"));
} catch (ParseException e) {
e.printStackTrace();
}
long base = baseDate.getTimeInMillis();
try {
baseDate.setTime(chineseDateFormat.parse(curDate));
Calendar calendar = Calendar.getInstance();
calendar.setTime(chineseDateFormat.parse(curDate));
y = calendar.get(Calendar.YEAR);
m = calendar.get(Calendar.MONTH) + 1;
d = calendar.get(Calendar.DATE);
} catch (ParseException e) {
e.printStackTrace();
}
long obj = baseDate.getTimeInMillis();
int offset = (int) ((obj - base) / 86400000L);
//求出和1900年1月31日相差的天数
dayCyl = offset + 40;//干支天
monCyl = 14;//干支月
//用offset减去每农历年的天数
// 计算当天是农历第几天
//i最终结果是农历的年份
//offset是当年的第几天
int iYear, daysOfYear = 0;
for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
daysOfYear = lYearDays(iYear);
offset -= daysOfYear;
monCyl += 12;
}
if (offset < 0) {
offset += daysOfYear;
iYear--;
monCyl -= 12;
}
//农历年份
lyear = iYear;
yearCyl = iYear - 1864;//***********干支年**********//
leapMonth = leapMonth(iYear); //闰哪个月,1-12
leap = false;
//用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天
int iMonth, daysOfMonth = 0;
for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {
//闰月
if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {
--iMonth;
leap = true;
daysOfMonth = leapDays(iYear);
} else
daysOfMonth = monthDays(iYear, iMonth);
offset -= daysOfMonth;
//解除闰月
if (leap && iMonth == (leapMonth + 1))
leap = false;
if (!leap)
monCyl++;
}
//offset为0时，并且刚才计算的月份是闰月，要校正
if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
if (leap) {
leap = false;
} else {
leap = true;
--iMonth;
--monCyl;
}
}
//offset小于0时，也要校正
if (offset < 0) {
offset += daysOfMonth;
--iMonth;
--monCyl;
}
lmonth = iMonth;
lday = offset + 1;
/**
* 计算阴历日期
*/
lunarDate = getChinaDayString(lday);
/**
* 计算24节气
*/
if (d == sTerm(y, (m - 1) * 2))
solarTerms = SolarTerm[(m - 1) * 2];
else if (d == sTerm(y, (m - 1) * 2 + 1))
solarTerms = SolarTerm[(m - 1) * 2 + 1];
else
solarTerms = "";
/**
* 计算公历节日
*/
this.solarFestival = "";
for (String ftv : sFtv) {
if (Integer.parseInt(ftv.substring(0, 2)) == m
&& Integer.parseInt(ftv.substring(2, 4)) == d) {
solarFestival = ftv.substring(5);
}
}
/**
* 计算农历节日
*/
this.lunarFestival = "";
for (String ftv : lFtv) {
if (Integer.parseInt(ftv.substring(0, 2)) == lmonth
&& Integer.parseInt(ftv.substring(2, 4)) == lday) {
lunarFestival = ftv.substring(5);
}
}
/**
* 计算公历节日
*/
for (String ftv : wFtv) {
if (Integer.parseInt(ftv.substring(0, 2)) == m &&
Integer.parseInt(ftv.substring(2, 3)) == baseDate.get(Calendar.WEEK_OF_MONTH) &&
Integer.parseInt(ftv.substring(3, 4)) == baseDate.get(Calendar.DAY_OF_WEEK)) {
solarFestival += ftv.substring(5);
}
}
}
/**
* 根据阴历日期计算阴历
* @param day
* @return
*/
private String getChinaDayString(int day) {
String chineseTen[] =
{ "初", "十", "廿", "卅" };
int n = day % 10 == 0 ? 9 : day % 10 - 1;
if (day > 30)
return "";
if (day == 10)
return "初十";
else
return chineseTen[day / 10] + chineseNumber[n];
}
public void set(String curDate) {
CalculateLunarCalendar(curDate);
}
public String getSolarTerms() {
return solarTerms;
}
public String getSolarFestival() {
return solarFestival;
}
public String getLunarFestival() {
return lunarFestival;
}
public String getLunarDate() {
return lunarDate;
}
}
主要代码就是这些，通过这次也明白了不要被眼前的障碍所吓倒，等你试着去解决他的时候才发现是多么的令人愉悦，尤其是开发这一块，越是不想去写越是得逼着自己去写，向着大神更靠近一步。最后也希望大家能够给我一些意见
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