android开发分享flutter日期选择器flutter时间选择器

   //设置默认显示的日期为当前   datetime initialdate = datetime.now();      void showdefaultyearpicker(buildcontext context) async {    final datetime datetime = await showdatepicker(     context: context,     //定义控件打开时默认选择日期     initialdate: initialdate,     //定义控件最早可以选择的日期     firstdate: datetime(2018, 1),     //定义控件最晚可以选择的日期     lastdate: datetime(2022, 1),     builder: (buildcontext context, widget child) {      return theme(       data: commoncolors.themdata,       child: child,      );     },    );    if (datetime != null && datetime != initialdate) {}   }    

   //设置显示显示的时间为当前   timeofday initialtime = timeofday.now();   void showdefaultdatepicker(buildcontext context) async {    final timeofday timeofday = await showtimepicker(     context: context,     initialtime: initialtime,     builder: (buildcontext context, widget child) {      return theme(       data: commoncolors.themdata,       child: child,      );     },    );    if (timeofday != null && timeofday != initialtime) {     setstate(() {      initialtime = timeofday;     });    }   }