新的flutter本地通知，包括用于计划通知的基于时区的时间/日期调度系统。我已经创建了一个文件，包括本地通知在我的应用程序，但它似乎不太好用。当我调用showDailyAtTime()时显示错误
这是我的通知插件文件。
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:io' show File, Platform;
import 'package:http/http.dart' as http;
import 'package:rxdart/subjects.dart';
import 'package:timezone/data/latest_all.dart' as tz;
import 'package:timezone/timezone.dart' as tz;
import 'package:flutter_native_timezone/flutter_native_timezone.dart';
class NotificationPlugin {
FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;
final BehaviorSubject<ReceivedNotification>
didReceivedLocalNotificationSubject =
BehaviorSubject<ReceivedNotification>();
var initializationSettings;
NotificationPlugin._() {
init();
}
init() async {
flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
if (Platform.isIOS) {
_requestIOSPermission();
}
initializePlatformSpecifics();
}
initializePlatformSpecifics() {
var initializationSettingsAndroid =
AndroidInitializationSettings('app_notf_icon');
var initializationSettingsIOS = IOSInitializationSettings(
requestAlertPermission: true,
requestBadgePermission: true,
requestSoundPermission: false,
onDidReceiveLocalNotification: (id, title, body, payload) async {
ReceivedNotification receivedNotification = ReceivedNotification(
id: id, title: title, body: body, payload: payload);
didReceivedLocalNotificationSubject.add(receivedNotification);
},
);
initializationSettings = InitializationSettings(
android: initializationSettingsAndroid, iOS: initializationSettingsIOS);
}
_requestIOSPermission() {
flutterLocalNotificationsPlugin
.resolvePlatformSpecificImplementation<
IOSFlutterLocalNotificationsPlugin>()
.requestPermissions(
alert: false,
badge: true,
sound: true,
);
}
setListenerForLowerVersions(Function onNotificationInLowerVersions) {
didReceivedLocalNotificationSubject.listen((receivedNotification) {
onNotificationInLowerVersions(receivedNotification);
});
}
setOnNotificationClick(Function onNotificationClick) async {
await flutterLocalNotificationsPlugin.initialize(initializationSettings,
onSelectNotification: (String payload) async {
onNotificationClick(payload);
});
}
Future<void> configureLocalTimeZone() async {
tz.initializeTimeZones();
final String timeZoneName = await FlutterNativeTimezone.getLocalTimezone();
tz.setLocalLocation(tz.getLocation(timeZoneName));
}
tz.TZDateTime nextInstanceOfNotification(int hour, int minute) {
final tz.TZDateTime now = tz.TZDateTime.now(tz.local);
tz.TZDateTime scheduledDate =
tz.TZDateTime(tz.local, now.year, now.month, now.day, 10, 30);
if (scheduledDate.isBefore(now)) {
scheduledDate = scheduledDate.add(const Duration(days: 1));
}
print(tz.TZDateTime.now(tz.local).toString());
print(scheduledDate.toString());
return scheduledDate;
}
Future<void> showDailyAtTime() async {
tz.initializeTimeZones();
final String timeZoneName = await FlutterNativeTimezone.getLocalTimezone();
tz.setLocalLocation(tz.getLocation(timeZoneName));
var time = Time(21, 3, 0);
var androidChannelSpecifics = AndroidNotificationDetails(
'CHANNEL_ID 4',
'CHANNEL_NAME 4',
"CHANNEL_DESCRIPTION 4",
importance: Importance.max,
priority: Priority.high,
);
var iosChannelSpecifics = IOSNotificationDetails();
var platformChannelSpecifics = NotificationDetails(
android: androidChannelSpecifics, iOS: iosChannelSpecifics);
await flutterLocalNotificationsPlugin.zonedSchedule(
0,
'Test Title at ${time.hour}:${time.minute}.${time.second}',
'Test Body',
tz.TZDateTime.now(tz.local).add(const Duration(seconds: 5)),
platformChannelSpecifics,
uiLocalNotificationDateInterpretation:
UILocalNotificationDateInterpretation.absoluteTime,
androidAllowWhileIdle: true,
matchDateTimeComponents: DateTimeComponents.time,
payload: 'Test Payload',
);
}
Future<int> getPendingNotificationCount() async {
List<PendingNotificationRequest> p =
await flutterLocalNotificationsPlugin.pendingNotificationRequests();
return p.length;
}
Future<void> cancelNotification() async {
await flutterLocalNotificationsPlugin.cancel(0);
}
Future<void> cancelAllNotification() async {
await flutterLocalNotificationsPlugin.cancelAll();
}
}
NotificationPlugin notificationPlugin = NotificationPlugin._();
class ReceivedNotification {
final int id;
final String title;
final String body;
final String payload;
ReceivedNotification({
@required this.id,
@required this.title,
@required this.body,
@required this.payload,
});
}
我试图在主屏幕上调用的文件
import 'package:flutter/material.dart';
import './notification_plugin.dart';
import 'package:timezone/data/latest_all.dart' as tz;
import 'package:timezone/timezone.dart';
main() {
tz.initializeTimeZones();
final detroit = getLocation('America/Detroit');
final now = new TZDateTime.now(detroit);
runApp(MyNotificationApp());
}
class MyNotificationApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyApp(),
);
}
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
TextEditingController textController_tzDevice = TextEditingController()
..text = 'No Text';
TextEditingController textController_tzSchedule = TextEditingController();
@override
void initState() {
WidgetsFlutterBinding.ensureInitialized();
// TODO: implement initState
notificationPlugin.configureLocalTimeZone();
notificationPlugin.showDailyAtTime();
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('My New App'),
),
body: Center(
child: Column(
children: [
TextField(
controller: textController_tzDevice,
),
TextField(
controller: textController_tzSchedule,
),
RaisedButton(
child: Text('SET'),
onPressed: () async {
notificationPlugin.configureLocalTimeZone();
notificationPlugin.showDailyAtTime();
},
)
],
),
),
);
}
}
这有什么问题?
错误如下:
Failed to handle method call
E/MethodChannel#dexterous.com/flutter/local_notifications( 6256): org.threeten.bp.zone.ZoneRulesException: No time-zone data files registered
E/MethodChannel#dexterous.com/flutter/local_notifications( 6256): at org.threeten.bp.zone.ZoneRulesProvider.getProvider(ZoneRulesProvider.java:165)
E/MethodChannel#dexterous.com/flutter/local_notifications( 6256): at org.threeten.bp.zone.ZoneRulesProvider.getRules(ZoneRulesProvider.java:122)
E/MethodChannel#dexterous.com/flutter/local_notifications( 6256): at org.threeten.bp.ZoneRegion.ofId(ZoneRegion.java:143)
.....
..
E/flutter ( 6256): #0 StandardMethodCodec.decodeEnvelope
package:flutter/…/services/message_codecs.dart:582
E/flutter ( 6256): #1 MethodChannel._invokeMethod
package:flutter/…/services/platform_channel.dart:159
E/flutter ( 6256): <asynchronous suspension>
E/flutter ( 6256): #2 MethodChannel.invokeMethod
package:flutter/…/services/platform_channel.dart:332
E/flutter ( 6256): #3 AndroidFlutterLocalNotificationsPlugin.zonedSchedule
package:flutter_local_notifications/src/platform_flutter_local_notifications.dart:136
E/flutter ( 6256): #4 FlutterLocalNotificationsPlugin.zonedSchedule
package:flutter_local_notifications/src/flutter_local_notifications_plugin.dart:304
E/flutter ( 6256): #5 NotificationPlugin.showDailyAtTime
package:notificaiton_app/notification_plugin.dart:104
E/flutter ( 6256): <asynchronous suspension>
E/flutter ( 6256): #6 _MyAppState.build.<anonymous closure>
package:notificaiton_app/main.dart:60
E/flutter ( 6256): #7 _MyAppState.build.<anonymous closure>
package:notificaiton_app/main.dart:58
请检查下面的答案:
从日志来看，似乎应用程序有时会在initialize()之前调用zonedSchedule()。
https://github.com/MaikuB/flutter_local_notifications/issues/1149