我以前遇到过像你这样的问题，但是通过应用下面的代码完成了
class AddTaskScreen extends StatefulWidget {
static String id = 'AddTaskScreen';
@override
_AddTaskScreenState createState() => _AddTaskScreenState();
}
class _AddTaskScreenState extends State<AddTaskScreen> {
final taskController = TextEditingController();
final deskController = TextEditingController();
String currTask = '';
String deskTask = '';
bool remindMe = false;
DateTime reminderDate;
TimeOfDay reminderTime;
int id;
@override
Widget build(BuildContext context) {
return Container(
child: Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Text(
Kunci.add_task.tr(),
textAlign: TextAlign.center,
style: TextStyle(
fontWeight: FontWeight.w500,
),
),
SizedBox(height: 15),
TextFormField(
controller: taskController,
autofocus: false,
textCapitalization: TextCapitalization.sentences,
onChanged: (newVal) {
currTask = newVal;
},
decoration: InputDecoration(
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(width: 0.5),
),
hintText: Kunci.title_here.tr(),
contentPadding: EdgeInsets.all(10),
border: OutlineInputBorder(
borderSide: BorderSide(width: 0.5),
),
),
),
SizedBox(height: 5),
TextField(
maxLines: 3,
controller: deskController,
autofocus: false,
textCapitalization: TextCapitalization.sentences,
onChanged: (newVal) {
deskTask = newVal;
},
decoration: InputDecoration(
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(width: 0.5),
),
hintText: Kunci.desc_here.tr(),
contentPadding: EdgeInsets.all(10),
border: OutlineInputBorder(
borderSide: BorderSide(width: 0.5),
),
),
),
SizedBox(height: 10.0),
SwitchListTile(
contentPadding: EdgeInsets.all(0),
value: remindMe,
title: Text(Kunci.reminder.tr()),
onChanged: (newValue) async {
if (newValue) {
reminderDate = await showDatePicker(
context: context,
initialDate: DateTime.now(),
firstDate: DateTime.now(),
lastDate: DateTime(DateTime.now().year + 2),
);
if (reminderDate == null) {
return;
}
reminderTime = await showTimePicker(
context: context, initialTime: TimeOfDay.now());
if (reminderDate != null && reminderTime != null) {
remindMe = newValue;
}
} else {
reminderDate = null;
reminderTime = null;
remindMe = newValue;
}
print(reminderTime);
print(reminderDate);
setState(() {});
},
),
Container(
child: remindMe
? Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Icon(FlutterIcons.calendar_ant, size: 20),
SizedBox(width: 5),
Text(
DateTime(
reminderDate.year,
reminderDate.month,
reminderDate.day,
reminderTime.hour,
reminderTime.minute,
).toString().substring(0, 10),
style: TextStyle(fontSize: 15),
),
SizedBox(width: 15),
Icon(FlutterIcons.calendar_ant, size: 20),
SizedBox(width: 5),
Text(
DateTime(
reminderDate.year,
reminderDate.month,
reminderDate.day,
reminderTime.hour,
reminderTime.minute,
).toString().substring(11, 16),
style: TextStyle(fontSize: 15),
),
],
)
: null),
SizedBox(
height: remindMe ? 10.0 : 0.0,
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Expanded(
child: FlatButton(
child: Text(
Kunci.cancel.tr(),
style: TextStyle(color: Colors.white, letterSpacing: 1.5),
),
onPressed: () {
Navigator.pop(context);
},
color: Colors.grey,
),
),
SizedBox(width: 10),
Expanded(
child: FlatButton(
child: Text(
Kunci.save.tr(),
style: TextStyle(color: Colors.white, letterSpacing: 1.5),
),
onPressed: () async {
if (remindMe) {
**var scheduledNotificationDateTime = reminderDate
.add(Duration(
hours: reminderTime.hour,
minutes: reminderTime.minute))
.subtract(Duration(seconds: 5));
var androidPlatformChannelSpecifics =
AndroidNotificationDetails(
currTask,
'To Do Notification',
'Do the task',
sound: RawResourceAndroidNotificationSound('pop'),
priority: Priority.high,
importance: Importance.high,
playSound: true,**
);
var iOSPlatformChannelSpecifics =
IOSNotificationDetails();
NotificationDetails platformChannelSpecifics =
NotificationDetails(
android: androidPlatformChannelSpecifics,
iOS: iOSPlatformChannelSpecifics);
id = Provider.of<TaskData>(context, listen: false)
.tasks
.length;
print(id);
await flutterLocalNotificationsPlugin.schedule(
id,
Kunci.task_reminder.tr(),
currTask,
scheduledNotificationDateTime,
platformChannelSpecifics);
}
Provider.of<TaskData>(
context,
listen: false,
).addTask(Task(
title: currTask,
deskripsi: deskTask,
isChecked: false,
reminderDate: reminderDate == null
? null
: reminderDate.add(Duration(
hours: reminderTime.hour,
minutes: reminderTime.minute,
)),
reminderId: reminderDate != null ? id : null,
));
Navigator.pop(context);
},
color: Theme.of(context).accentColor,
),
),
],
),
],
),
),
);
}
}
请使用您的代码进行调整