flutter 底部弹框 选择农历和阳历的日期和时间

最近在做一个万年历的项目，用到了选择出生日期加时辰，关键是还农历和阳历切换的，找了半天也没找到现成的，那就自己做一个吧，首先，效果如图

由于是初学的flutter，首次用flutter做项目，可能各方面有运用的不够好的地方，还望大家多多指教，一起完善，我这个只是凑合能用的，下面上代码：

 

 

pickCalendar.dart

 

import 'package:flutter/cupertino.dart';

import 'package:flutter/material.dart';

 

import 'changeNongliYangli.dart';

 

void incrementCounter(context) {

showDialog(

barrierDismissible: true,

context: context,

builder: (context) {

// 用Scaffold返回显示的内容，能跟随主题

return GestureDetector(

onTap: () {

Navigator.pop(context);

},

child: Scaffold(

backgroundColor: Colors.transparent, // 设置透明背影

body: Stack(children: [PickBody()])));

},

);

}

 

class PickBody extends StatefulWidget {

PickBody({Key key}) : super(key: key);

 

@override

_PickBodyState createState() => _PickBodyState();

}

 

class _PickBodyState extends State {

 

bool gongli = true;

String sYear = "2000";

String sMonth = '6';

String sDay = '15';

String sTime = '24';

List year = [], month = [], yMonth = [], day = [], yday = [];

List nMonth = ['正', '二', '三', '四', '五', '六', '七', '八', '九', '十', '冬', '腊'];

List time = [

'时辰未知',

'0时子',

'1时丑',

'2时丑',

'3时寅',

'4时寅',

'5时',

'6时',

'7时',

'8时',

'9时',

'10时',

'11时',

'12时',

'13时丑',

'14时丑',

'15时寅',

'16时寅',

'17时',

'18时',

'19时',

'20时',

'21时',

'22时',

'23时'

];

List nday = [

'初一',

'初二',

'初三',

'初四',

'初五',

'初六',

'初七',

'初八',

'初九',

'初十',

'十一',

'十二',

'十三',

'十四',

'十五',

'十六',

'十七',

'十八',

'十九',

'二十',

'廿一',

'廿二',

'廿三',

'廿四',

'廿五',

'廿六',

'廿七',

'廿八',

'廿九',

'三十',

'三十一'

];

FixedExtentScrollController yearController =

new FixedExtentScrollController(initialItem: 20);

FixedExtentScrollController monthController =

new FixedExtentScrollController(initialItem: 5);

FixedExtentScrollController dayController =

new FixedExtentScrollController(initialItem: 14);

FixedExtentScrollController timeController =

new FixedExtentScrollController();

 

@override

void initState() {

// TODO: implement initState

super.initState();

 

// 获取当天的日期，年份默认选择的是2000年,月份默认是6月，日期默认是15日，时间默认是不详

DateTime today = DateTime.now();

 

// 请空之前的数据

for (var y = 1980; y < today.year + 1; y++) {

year.add('$y');

}

yMonth = [];

for (int m = 1; m < 13; m++) {

yMonth.add('$m');

}

// 获取默认年份和月份之下的天数

int count = getYangliDay(int.parse(sYear), int.parse(sMonth));

print('count---$count');

yday = [];

for (int m = 1; m < count + 1; m++) {

yday.add('$m');

}

}

 

@override

Widget build(BuildContext context) {

// 切换农历和阳历的时候更换月份和天的称呼

if (gongli) {

month = yMonth;

day = yday;

} else {

month = nMonth;

int count = getNongliDay(int.parse(sYear), int.parse(sMonth));

print('农历的天数==${count}');

List old = nday;

List newDay = old.sublist(0, count);

// 初始化当前的选中的月份的天数

day = newDay;

}

return Positioned(

left: 0,

right: 0,

bottom: 0,

child: Container(

height: 300,

decoration: BoxDecoration(color: Colors.white),

// padding: EdgeInsets.all(10),

child: Column(children: [

Container(

padding: EdgeInsets.all(10),

decoration: BoxDecoration(

border: Border(

bottom:

BorderSide(width: 2, color: Color(0xFFE53B49)))),

child: Row(

mainAxisAlignment: MainAxisAlignment.spaceBetween,

children: [

GestureDetector(

child: Text('取消',

style: TextStyle(color: Color(0xFFE53B49))),

onTap: () {

print('关闭弹框');

Navigator.pop(context);

},

),

Container(

child: Row(

children: [

FlatButton(

child: Text('公历'),

onPressed: () {

setState(() {

gongli = true;

});

},

color: gongli ? Color(0xFFE53B49) : Colors.white,

textColor:

gongli ? Colors.white : Color(0xFFE53B49),

shape: BeveledRectangleBorder(

side: BorderSide(

color: Color(0xFFE53B49), width: 1),

borderRadius: BorderRadius.only(

topLeft: Radius.circular(3),

bottomLeft: Radius.circular(3))),

),

FlatButton(

child: Text('农历'),

splashColor: Color(0xFFE53B49),

color: gongli ? Colors.white : Color(0xFFE53B49),

textColor:

gongli ? Color(0xFFE53B49) : Colors.white,

shape: BeveledRectangleBorder(

side: BorderSide(

color: Color(0xFFE53B49), width: 1),

borderRadius: BorderRadius.only(

topRight: Radius.circular(3),

bottomRight: Radius.circular(3))),

onPressed: () {

setState(() {

gongli = false;

});

},

),

],

),

),

GestureDetector(

child: Text('确定',

style: TextStyle(color: Color(0xFFE53B49))),

onTap: () {

print('确定 关闭弹框');

print(sYear);

print(sMonth);

print(sDay);

print(sTime);

Navigator.pop(context);

},

),

],

)),

Row(

mainAxisAlignment: MainAxisAlignment.spaceBetween,

children: [

Expanded(

flex: 1,

child: Container(

height: 200,

child: CupertinoPicker(

useMagnifier: true,

magnification: 1.2,

squeeze: 1,

diameterRatio: 1.5,

looping: false,

backgroundColor: Colors.transparent, //选择器背景色

itemExtent: 35, //item的高度

onSelectedItemChanged: (index) {

print('index === $index');

int selectYear = 1980 + index;

// 更改年的时候，查询选中的年和月的天数

print("选中年 = ${selectYear}");

setState(() {

sYear = '$selectYear';

// 更换年的时候检测是阳历还是农历

updateDay();

// monthController.jumpToItem(3);

});

},

scrollController: yearController,

children: XZItem(year, '年'),

))),

Expanded(

flex: 1,

child: Container(

height: 200,

child: CupertinoPicker(

useMagnifier: true,

magnification: 1.2,

squeeze: 1,

diameterRatio: 1.5,

looping: false,

backgroundColor: Colors.transparent, //选择器背景色

itemExtent: 35, //item的高度

onSelectedItemChanged: (index) {

//选中item的位置索引

print("月index = $index}");

setState(() {

sMonth = '${index + 1}';

});

sMonth = '${index + 1}';

updateDay();

},

scrollController: monthController,

children: XZItem(month, '月'),

))),

Expanded(

flex: 1,

child: Container(

height: 200,

child: CupertinoPicker(

useMagnifier: true,

magnification: 1.2,

squeeze: 1,

diameterRatio: 1.5,

looping: false,

backgroundColor: Colors.transparent, //选择器背景色

itemExtent: 35, //item的高度

onSelectedItemChanged: (index) {

//选中item的位置索引

print("日index = $index}");

setState(() {

sDay = '${index + 1}';

});

sDay = '${index + 1}';

},

scrollController: dayController,

children: XZItem(day, '日'),

))),

Expanded(

flex: 1,

child: Container(

height: 200,

child: CupertinoPicker(

useMagnifier: true,

magnification: 1.2,

squeeze: 1,

diameterRatio: 1.5,

looping: false,

backgroundColor: Colors.transparent, //选择器背景色

itemExtent: 35, //item的高度

onSelectedItemChanged: (index) {

//选中item的位置索引

print("index = $index}");

setState(() {

if (index == 0) {

sTime = '24';

} else {

sTime = '${index - 1}';

}

});

},

scrollController: timeController,

children: XZItem(time, ''),

))),

])

])));

}

 

updateDay() {

if (gongli) {

// 公历// 截取天数

print('widget.sYear ==== ${sYear}');

print('widget.sMonth ==== ${sMonth}');

print('widget.sDay ==== ${sDay}');

int count = getYangliDay(int.parse(sYear), int.parse(sMonth));

print('count---$count');

yday = [];

for (int m = 1; m < count + 1; m++) {

yday.add('$m');

}

} else {

int count = getNongliDay(int.parse(sYear), int.parse(sMonth));

print('农历的天数==${count}');

List old = day;

List newDay = old.sublist(0, count);

print(old);

print(newDay);

day = newDay;

}

}

 

List XZItem(_data, type) {

List list = new List();

for (var i = 0; i < _data.length; i++) {

list.add(Text('${_data[i]}$type',

style: TextStyle(color: Colors.black, fontSize: 14)));

}

 

return list;

}

}

 

 

changeNongliYangli.dart

// 计算阳历的这个年份这个月份，天数有几天

getYangliDay(year,month){

int count = 0;

//判断大月份

if (month == 1 ||

month == 3 ||

month == 5 ||

month == 7 ||

month == 8 ||

month == 10 ||

month == 12) {

count = 31;

}

 

//判断小月

if (month == 4 || month == 6 || month == 9 || month == 11) {

count = 30;

}

 

//判断平年与闰年

if (month == 2) {

if (isLeapYear(year)) {

count = 29;

} else {

count = 28;

}

}

return count;

}

/**

* 是否是闰年

*/

bool isLeapYear(int year) {

return ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);

}

 

// 计算阳历的这个年份这个月份，天数有几天

int getNongliDay(int year,int month){

if ((LUNAR_INFO[year - 1900] & (0x100000 >> month)) == 0)

return 29;

else

return 30;

}

 

/**

* 用来表示1900年到2099年间农历年份的相关信息，共24位bit的16进制表示，其中：

* 1. 前4位表示该年闰哪个月；

* 2. 5-17位表示农历年份13个月的大小月分布，0表示小，1表示大；

* 3. 最后7位表示农历年首（正月初一）对应的公历日期。

*

* 以2014年的数据0x955ABF为例说明：

* 1001 0101 0101 1010 1011 1111

* 闰九月 农历正月初一对应公历1月31号

*/

final List LUNAR_INFO = [

0x84B6BF,

/*1900*/

0x04AE53,

0x0A5748,

0x5526BD,

0x0D2650,

0x0D9544,

0x46AAB9,

0x056A4D,

0x09AD42,

0x24AEB6,

0x04AE4A,

/*1901-1910*/

0x6A4DBE,

0x0A4D52,

0x0D2546,

0x5D52BA,

0x0B544E,

0x0D6A43,

0x296D37,

0x095B4B,

0x749BC1,

0x049754,

/*1911-1920*/

0x0A4B48,

0x5B25BC,

0x06A550,

0x06D445,

0x4ADAB8,

0x02B64D,

0x095742,

0x2497B7,

0x04974A,

0x664B3E,

/*1921-1930*/

0x0D4A51,

0x0EA546,

0x56D4BA,

0x05AD4E,

0x02B644,

0x393738,

0x092E4B,

0x7C96BF,

0x0C9553,

0x0D4A48,

/*1931-1940*/

0x6DA53B,

0x0B554F,

0x056A45,

0x4AADB9,

0x025D4D,

0x092D42,

0x2C95B6,

0x0A954A,

0x7B4ABD,

0x06CA51,

/*1941-1950*/

0x0B5546,

0x555ABB,

0x04DA4E,

0x0A5B43,

0x352BB8,

0x052B4C,

0x8A953F,

0x0E9552,

0x06AA48,

0x6AD53C,

/*1951-1960*/

0x0AB54F,

0x04B645,

0x4A5739,

0x0A574D,

0x052642,

0x3E9335,

0x0D9549,

0x75AABE,

0x056A51,

0x096D46,

/*1961-1970*/

0x54AEBB,

0x04AD4F,

0x0A4D43,

0x4D26B7,

0x0D254B,

0x8D52BF,

0x0B5452,

0x0B6A47,

0x696D3C,

0x095B50,

/*1971-1980*/

0x049B45,

0x4A4BB9,

0x0A4B4D,

0xAB25C2,

0x06A554,

0x06D449,

0x6ADA3D,

0x0AB651,

0x095746,

0x5497BB,

/*1981-1990*/

0x04974F,

0x064B44,

0x36A537,

0x0EA54A,

0x86B2BF,

0x05AC53,

0x0AB647,

0x5936BC,

0x092E50,

0x0C9645,

/*1991-2000*/

0x4D4AB8,

0x0D4A4C,

0x0DA541,

0x25AAB6,

0x056A49,

0x7AADBD,

0x025D52,

0x092D47,

0x5C95BA,

0x0A954E,

/*2001-2010*/

0x0B4A43,

0x4B5537,

0x0AD54A,

0x955ABF,

0x04BA53,

0x0A5B48,

0x652BBC,

0x052B50,

0x0A9345,

0x474AB9,

/*2011-2020*/

0x06AA4C,

0x0AD541,

0x24DAB6,

0x04B64A,

0x6a573D,

0x0A4E51,

0x0D2646,

0x5E933A,

0x0D534D,

0x05AA43,

/*2021-2030*/

0x36B537,

0x096D4B,

0xB4AEBF,

0x04AD53,

0x0A4D48,

0x6D25BC,

0x0D254F,

0x0D5244,

0x5DAA38,

0x0B5A4C,

/*2031-2040*/

0x056D41,

0x24ADB6,

0x049B4A,

0x7A4BBE,

0x0A4B51,

0x0AA546,

0x5B52BA,

0x06D24E,

0x0ADA42,

0x355B37,

/*2041-2050*/

0x09374B,

0x8497C1,

0x049753,

0x064B48,

0x66A53C,

0x0EA54F,

0x06AA44,

0x4AB638,

0x0AAE4C,

0x092E42,

/*2051-2060*/

0x3C9735,

0x0C9649,

0x7D4ABD,

0x0D4A51,

0x0DA545,

0x55AABA,

0x056A4E,

0x0A6D43,

0x452EB7,

0x052D4B,

/*2061-2070*/

0x8A95BF,

0x0A9553,

0x0B4A47,

0x6B553B,

0x0AD54F,

0x055A45,

0x4A5D38,

0x0A5B4C,

0x052B42,

0x3A93B6,

/*2071-2080*/

0x069349,

0x7729BD,

0x06AA51,

0x0AD546,

0x54DABA,

0x04B64E,

0x0A5743,

0x452738,

0x0D264A,

0x8E933E,

/*2081-2090*/

0x0D5252,

0x0DAA47,

0x66B53B,

0x056D4F,

0x04AE45,

0x4A4EB9,

0x0A4D4C,

0x0D1541,

0x2D92B5 /*2091-2099*/

];

 

后续，后来发现自己没考虑闰月的情况，后续改好了再补吧