在Flutter中,我们可以使用flutter_local_notifications插件来使用Firebase Messaging的onBackgroundMessage方法来创建通知。
首先,确保已经在项目的pubspec.yaml文件中添加了flutter_local_notifications插件的依赖。
接下来,我们需要在Android和iOS平台上进行一些配置。
对于Android平台,我们需要在AndroidManifest.xml文件中添加以下代码:
<service android:name="com.dexterous.flutterlocalnotifications.ForegroundService" android:exported="false"/>
对于iOS平台,我们需要在AppDelegate.swift文件中添加以下代码:
import flutter_local_notifications
func registerPlugins(registry: FlutterPluginRegistry) {
GeneratedPluginRegistrant.register(with: registry)
}
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
override func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
if #available(iOS 10.0, *) {
UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
}
GeneratedPluginRegistrant.register(with: self)
return super.application(application, didFinishLaunchingWithOptions: launchOptions)
}
}
接下来,我们可以在Flutter代码中使用flutter_local_notifications插件来创建通知。首先,我们需要初始化flutter_local_notifications,并设置通知的配置。
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
void initializeNotifications() async {
const AndroidInitializationSettings initializationSettingsAndroid =
AndroidInitializationSettings('app_icon');
final IOSInitializationSettings initializationSettingsIOS =
IOSInitializationSettings();
final InitializationSettings initializationSettings = InitializationSettings(
android: initializationSettingsAndroid, iOS: initializationSettingsIOS);
await flutterLocalNotificationsPlugin.initialize(initializationSettings);
}
然后,我们可以在Firebase Messaging的onBackgroundMessage方法中调用flutter_local_notifications插件来创建通知。
import 'package:firebase_messaging/firebase_messaging.dart';
Future<void> backgroundMessageHandler(RemoteMessage message) async {
await flutterLocalNotificationsPlugin.show(
0,
message.notification.title,
message.notification.body,
NotificationDetails(
android: AndroidNotificationDetails(
'your channel id',
'your channel name',
'your channel description',
importance: Importance.max,
priority: Priority.high,
),
iOS: IOSNotificationDetails(),
),
);
}
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
FirebaseMessaging.onBackgroundMessage(backgroundMessageHandler);
initializeNotifications();
runApp(MyApp());
}
在上述代码中,我们通过调用flutterLocalNotificationsPlugin.show方法来显示通知。我们可以设置通知的标题、内容和其他属性,如通知渠道、重要性和优先级。
至此,我们已经完成了在Flutter中使用flutter_local_notifications插件来使用Firebase Messaging的onBackgroundMessage方法来创建通知的过程。
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