导入包flutter_datetime_picker: 1.5.0
封装

import 'package:atui/jade/utils/JadeColors.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_datetime_picker/flutter_datetime_picker.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

class ATuiDateTimePickerDialog {
   
  static Future<DateTime> showDatePicker(
    BuildContext context, {
   
    bool showTitleActions: true,
    bool isShowDay: true,
    DateTime minTime,
    DateTime maxTime,
    DateChangedCallback onChanged,
    DateChangedCallback onConfirm,
    Function onCustomDateConfirm,
    DateCancelledCallback onCancel,
    locale: LocaleType.en,
    DateTime currentTime,
    DatePickerTheme theme,
  }) async {
   
    return await Navigator.push(
      context,
      _DatePickerRoute(
        showTitleActions: showTitleActions,
        onChanged: onChanged,
        onConfirm: onConfirm,
        onCustomDateConfirm: onCustomDateConfirm,
        onCancel: onCancel,
        locale: locale,
        theme: theme,
        isShowDay: isShowDay,
        barrierLabel:
            MaterialLocalizations.of(context).modalBarrierDismissLabel,
        pickerModel: DatePickerModel(
          currentTime: currentTime,
          maxTime: maxTime,
          minTime: minTime,
          locale: locale,
        ),
      ),
    );
  }
}

class _DatePickerRoute<T> extends PopupRoute<T> {
   
  _DatePickerRoute({
   
    this.showTitleActions,
    this.onChanged,
    this.onConfirm,
    this.onCustomDateConfirm,
    this.onCancel,
    theme,
    this.barrierLabel,
    this.locale,
    this.isShowDay,
    RouteSettings settings,
    pickerModel,
  })  : this.pickerModel = pickerModel ?? DatePickerModel(),
        this.theme = theme ?? DatePickerTheme(),
        super(settings: settings);

  final bool showTitleActions;
  final DateChangedCallback onChanged;
  final DateChangedCallback onConfirm;
  final Function onCustomDateConfirm;
  final DateCancelledCallback onCancel;
  final DatePickerTheme theme;
  final LocaleType locale;
  final BasePickerModel pickerModel;
  final bool isShowDay;
  @override
  Duration get transitionDuration => const Duration(milliseconds: 200);

  @override
  bool get barrierDismissible => true;

  @override
  final String barrierLabel;

  @override
  Color get barrierColor => Colors.black54;

  AnimationController _animationController;

  @override
  AnimationController createAnimationController() {
   
    assert(_animationController == null);
    _animationController =
        BottomSheet.createAnimationController(navigator.overlay);
    return _animationController;
  }

  @override
  Widget buildPage(BuildContext context, Animation<double> animation,
      Animation<double> secondaryAnimation) {
   
    Widget bottomSheet = MediaQuery.removePadding(
      context: context,
      removeTop: true,
      child: _DatePickerComponent(
        onChanged: onChanged,
        locale: this.locale,
        route: this,
        pickerModel: pickerModel,
        isShowDay: isShowDay,
      ),
    );
    return InheritedTheme.captureAll(context, bottomSheet);
  }
}

class _DatePickerComponent extends StatefulWidget {
   
  _DatePickerComponent(
      {
   Key key,
      @required this.route,
      this.onChanged,
      this.locale,
      this.pickerModel,
      this.isShowDay})
      : super(key: key);

  final DateChangedCallback onChanged;

  final _DatePickerRoute route;

  final LocaleType locale;

  final BasePickerModel pickerModel;

  bool isShowDay;
  @override
  State<StatefulWidget> createState() {
   
    return _DatePickerState();
  }
}

class _DatePickerState extends State<_DatePickerComponent> {
   
  FixedExtentScrollController leftScrollCtrl, middleScrollCtrl, rightScrollCtrl;

  List<String> _btnTitleList = ['按日','按月','自定义'];
  int _selectPosition = 0;
  bool _isCustomTime = false;
  String _startDate;
  String _endDate = '结束时间';
  int _customDateType = 1; //1:开始时间 2:结束时间

  @override
  void initState() {
   
    super.initState();
    refreshScrollOffset();
    _startDate = '${
     widget.pickerModel.finalTime().year}/${
     widget.pickerModel.finalTime().month}/${
     widget.pickerModel.