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Flutter 日历选择器 时间选择器，非插件

Flutter 日历选择器 时间选择器，非插件

作者: 技术混子 | 来源:发表于2020-08-28 16:16 被阅读0次
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    日期选择器直接复制如下代码，日期可以动态添加我这里是初始代码没有做细节调整,具体介绍解释 ，请看代码注释！！

    import 'package:flutter/material.dart';

class CalendarView extends StatefulWidget {
 @override
 _CalendarViewState createState() => _CalendarViewState();
 }

class _CalendarViewState extends State<CalendarView> {
  List week = [
'日',
'一',
'二',
'三',
'四',
'五',
'六',
 ];

 /* 选中 标识*/
 int selectValue = 40; // 天
 int monthValue = 13; // 月
 int yearValue = 100; // 年
 /* 左右月份 选择*/
 int monthIn = 0;
 //创建时间对象，获取当前时间
 DateTime now = DateTime.now();

 /* 获取这个月的天数   ⬇️*/
 List<int> _monthDays = <int>[31, -1, 31, 30, 31, 30, 31, 31, 30, 31,    30, 31];
 int getDaysInMonth(int year, int month) {
   if (month == DateTime.february) {
  final bool isLeapYear =
      (year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0);
  if (isLeapYear) return 29;
  return 28;
}
return _monthDays[month - 1];
 }
 /* 获取这个月的天数   ⬆️*/

 /* 得到这个月的第一天是星期几（0 是星期日 1 是星期一...）⬇️*/
 int computeFirstDayOffset(
  int year, int month, MaterialLocalizations localizations) {
final int weekdayFromMonday = DateTime(year, month).weekday - 1;

final int firstDayOfWeekFromSunday = localizations.firstDayOfWeekIndex;

final int firstDayOfWeekFromMonday = (firstDayOfWeekFromSunday - 1) % 7;

return (weekdayFromMonday - firstDayOfWeekFromMonday) % 7;
 }
 /* 得到这个月的第一天是星期几（0 是星期日 1 是星期一...）⬆️*/

 /* 排版从 周几 开始  一个 多少单元格⬇️ */
 int fromLocationNums(int year, int month) {
var day = getDaysInMonth(year, month);
var index =
    computeFirstDayOffset(year, month, MaterialLocalizations.of(context));
var nums = day + index;
return nums;
 }
 /* 排版  从周几 开始  一共 多少单元格 ⬆️ */

 /* 排版  动态添加 day 数组 ⬇️ */
 List getDays(int year, int month) {
var nums =
    computeFirstDayOffset(year, month, MaterialLocalizations.of(context));
List day = [
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
  '12',
  '13',
  '14',
  '15',
  '16',
  '17',
  '18',
  '19',
  '20',
  '21',
  '22',
  '23',
  '24',
  '25',
  '26',
  '27',
  '28',
  '29',
  '30',
  '31',
];
List one = [
  '',
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
  '12',
  '13',
  '14',
  '15',
  '16',
  '17',
  '18',
  '19',
  '20',
  '21',
  '22',
  '23',
  '24',
  '25',
  '26',
  '27',
  '28',
  '29',
  '30',
  '31',
];
List two = [
  '',
  '',
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
  '12',
  '13',
  '14',
  '15',
  '16',
  '17',
  '18',
  '19',
  '20',
  '21',
  '22',
  '23',
  '24',
  '25',
  '26',
  '27',
  '28',
  '29',
  '30',
  '31',
];
List three = [
  '',
  '',
  '',
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
  '12',
  '13',
  '14',
  '15',
  '16',
  '17',
  '18',
  '19',
  '20',
  '21',
  '22',
  '23',
  '24',
  '25',
  '26',
  '27',
  '28',
  '29',
  '30',
  '31',
];
List four = [
  '',
  '',
  '',
  '',
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
  '12',
  '13',
  '14',
  '15',
  '16',
  '17',
  '18',
  '19',
  '20',
  '21',
  '22',
  '23',
  '24',
  '25',
  '26',
  '27',
  '28',
  '29',
  '30',
  '31',
];
List five = [
  '',
  '',
  '',
  '',
  '',
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
  '12',
  '13',
  '14',
  '15',
  '16',
  '17',
  '18',
  '19',
  '20',
  '21',
  '22',
  '23',
  '24',
  '25',
  '26',
  '27',
  '28',
  '29',
  '30',
  '31',
];
List six = [
  '',
  '',
  '',
  '',
  '',
  '',
  '1',
  '2',
  '3',
  '4',
  '5',
  '6',
  '7',
  '8',
  '9',
  '10',
  '11',
  '12',
  '13',
  '14',
  '15',
  '16',
  '17',
  '18',
  '19',
  '20',
  '21',
  '22',
  '23',
  '24',
  '25',
  '26',
  '27',
  '28',
  '29',
  '30',
  '31',
];
if (nums == 1) {
  return one;
} else if (nums == 2) {
  return two;
} else if (nums == 3) {
  return three;
} else if (nums == 4) {
  return four;
} else if (nums == 5) {
  return five;
} else if (nums == 6) {
  return six;
} else {
  return day;
}
}
 /* 排版  动态添加 day 数组 ⬆️ */

  /* 标示 今天 日期 */
 bool today(int index) {
if (monthIn == 0) {
  var todays = getDays(
      (now.month + monthIn) > 12 ? now.year + 1 : now.year,
      (now.month + monthIn) > 12
          ? (now.month + monthIn) - 12
          : now.month + monthIn)[index];
  print('日历中的今天：$todays');
  print('今天：${now.day}');
  if (todays == now.day.toString()) {
    return true;
  } else {
    return false;
  }
} else {
  return false;
}
 }

 /* 当前选中日期 */
  bool selectDay(int index) {
var years = (now.month + monthIn) > 12 ? now.year + 1 : now.year;
var months = (now.month + monthIn) > 12
    ? (now.month + monthIn) - 12
    : now.month + monthIn;
if (years == yearValue && monthValue == months && index == selectValue) {
  return true;
} else {
  return false;
}
 }

 @override
 Widget build(BuildContext context) {
print("当前时间：$now");
return Row(
  children: [
    SizedBox(
      width: 10,
    ),
    Expanded(
      child: Column(
        children: [
          SizedBox(
            height: 15,
          ),
          Row(
            children: [
              SizedBox(
                width: 5,
              ),
              InkWell(
                onTap: () {
                  setState(() {
                    monthIn == 0 ? monthIn = 0 : monthIn = monthIn - 1;
                  });
                },
                child: Icon(
                  Icons.chevron_left,
                  color: monthIn == 0
                      ? Colors.transparent
                      : Color.fromRGBO(39, 153, 93, 0.4),
                  size: 35,
                ),
              ),
              Expanded(child: SizedBox()),
              Align(
                  alignment: Alignment.center,
                  child: Text(
                    '${(now.month + monthIn) > 12 ? now.year + 1 : now.year}年${(now.month + monthIn) > 12 ? (now.month + monthIn) - 12 : now.month + monthIn}月',
                    style: TextStyle(color: Colors.black, fontSize: 16),
                  )),
              Expanded(child: SizedBox()),
              InkWell(
                  onTap: () {
                    setState(() {
                      monthIn == 6 ? monthIn = 6 : monthIn = monthIn + 1;
                    });
                  },
                  child: Icon(
                    Icons.chevron_right,
                    color: monthIn == 6
                        ? Colors.transparent
                        : Color.fromRGBO(39, 153, 93, 0.4),
                    size: 35,
                  )),
              SizedBox(
                width: 5,
              ),
            ],
          ),
          GridView.builder(
              shrinkWrap: true,
              physics: new NeverScrollableScrollPhysics(), //禁止滑动
              itemCount: 7,
              //SliverGridDelegateWithFixedCrossAxisCount 构建一个横轴固定数量Widget
              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                  //横轴元素个数
                  crossAxisCount: 7,
                  //纵轴间距
                  mainAxisSpacing: 10.0,
                  //横轴间距
                  crossAxisSpacing: 10.0,
                  //子组件宽高长度比例
                  childAspectRatio: 1.0),
              itemBuilder: (BuildContext context, int index) {
                //Widget Function(BuildContext context, int index)
                return Align(
                  alignment: Alignment.center,
                  child: Text(
                    week[index],
                    style: TextStyle(color: Colors.black, fontSize: 14),
                  ),
                );
              }),
          GridView.builder(
              shrinkWrap: true,
              physics: new NeverScrollableScrollPhysics(), //禁止滑动
              itemCount: fromLocationNums(
                  (now.month + monthIn) > 12 ? now.year + 1 : now.year,
                  (now.month + monthIn) > 12
                      ? (now.month + monthIn) - 12
                      : now.month + monthIn),
              //SliverGridDelegateWithFixedCrossAxisCount 构建一个横轴固定数量Widget
              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                  //横轴元素个数
                  crossAxisCount: 7,
                  //纵轴间距
                  mainAxisSpacing: 0.0,
                  //横轴间距
                  crossAxisSpacing: 20.0,
                  //子组件宽高长度比例
                  childAspectRatio: 1.0),
              itemBuilder: (BuildContext context, int index) {
                //
                return InkWell(
                  onTap: () {
                    setState(() {
                      selectValue = index;
                      monthValue = (now.month + monthIn) > 12
                          ? (now.month + monthIn) - 12
                          : now.month + monthIn;
                      yearValue = (now.month + monthIn) > 12
                          ? now.year + 1
                          : now.year;
                    });
                  },
                  child: Container(
                    // width: 25,
                    // height: 25,
                    decoration: BoxDecoration(
                        borderRadius: BorderRadius.circular(5),
                        color:
                            /*  对 月和日 做判断   */
                            selectDay(index)
                                ? Color.fromRGBO(39, 153, 93, 0.1)
                                : Colors.transparent),
                    child: Align(
                      alignment: Alignment.center,
                      child: Text(
                        getDays(
                            (now.month + monthIn) > 12
                                ? now.year + 1
                                : now.year,
                            (now.month + monthIn) > 12
                                ? (now.month + monthIn) - 12
                                : now.month + monthIn)[index],
                        style: today(index)
                            ?
                            /* today */
                            TextStyle(
                                color: Color.fromRGBO(39, 153, 93, 0.7),
                                fontSize: 16,
                                fontWeight: FontWeight.w700)
                            :
                            /*正常日期  显示*/
                            TextStyle(color: Colors.black, fontSize: 14),
                      ),
                    ),
                  ),
                );
              }),
        ],
      ),
    ),
    SizedBox(
      width: 10,
    )
  ],
);
 }
}

    时间 选择器 时分秒 我用的是flutter自带的CupertinoTimerPicker

    import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

/*
   时间选择器
*/
 class TimerPicker extends StatefulWidget {
  final ValueChanged<String> onChanged;

 const TimerPicker({Key key, this.onChanged}) : super(key: key);
 @override
 _TimerPickerState createState() => _TimerPickerState();
}

class _TimerPickerState extends State<TimerPicker> {
 //创建时间对象，获取当前时间
 DateTime now = DateTime.now();
@override
Widget build(BuildContext context) {
return CupertinoTimerPicker(
  initialTimerDuration: Duration(
    hours: now.hour,
    minutes: now.minute,
  ),
  alignment: Alignment.center,
  mode: CupertinoTimerPickerMode.hm,
  onTimerDurationChanged: (value) {
    setState(() {
      print('${value.toString().substring(0, 8)}');
      widget.onChanged('${value.toString().substring(0, 8)}');
    });
  },
);
 }
}

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