[Firebase Messaging]:当应用程序在后台运行时，不会调用Background Message Handler方法吗? [英] [Firebase Messaging]: Background Message Handler method not called when the app in background?
本文介绍了[Firebase Messaging]:当应用程序在后台运行时，不会调用Background Message Handler方法吗?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在开发一个使用FCM推送通知的应用程序，当该应用程序在后台或终止并收到新通知时，我需要将该通知的数据保存在(SQLITE)中，而无需单击通知或重新打开再次单击该应用程序，除非单击该通知，否则不会在该应用程序中读取该通知.有什么建议吗?
I-am developing an app for pushing notifications using FCM, when the app in background or terminated and receiving new notification i need to save the data of this notification local in (SQLITE), without click on the notification or re-open the app again, the notification not read in the app unless clicked. Any suggestions?
这是我的NotificationHandler.dart
This my NotificationHandler.dart
import 'dart:async';
import 'dart:io';
import 'package:eshaar/model/message.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:intl/intl.dart';
import 'package:eshaar/model/database_helper.dart';
FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
new FlutterLocalNotificationsPlugin();
Future<dynamic> myBackgroundMessageHandler(Map<String, dynamic> message) async {
print("onBackgroundMessage: $message");
//_showBigPictureNotification(message);
return Future<void>.value();
}
Future onSelectNotification(String payload) async {
}
class NotificationHandler {
FirebaseMessaging _fcm = FirebaseMessaging();
StreamSubscription iosSubscription;
DatabaseHelper db = new DatabaseHelper();
static final NotificationHandler _singleton =
new NotificationHandler._internal();
factory NotificationHandler() {
return _singleton;
}
NotificationHandler._internal();
initializeFcmNotification() async {
var initializationSettingsAndroid =
new AndroidInitializationSettings('mipmap/ic_launcher');
var initializationSettingsIOS = new IOSInitializationSettings(
onDidReceiveLocalNotification: onDidReceiveLocalNotification);
var initializationSettings = new InitializationSettings(
initializationSettingsAndroid, initializationSettingsIOS);
flutterLocalNotificationsPlugin.initialize(initializationSettings,
onSelectNotification: onSelectNotification);
if (Platform.isIOS) {
iosSubscription = _fcm.onIosSettingsRegistered.listen((data) {
// save the token OR subscribe to a topic here
});
_fcm.requestNotificationPermissions(IosNotificationSettings());
} else {
_saveDeviceToken();
}
_fcm.configure(
onMessage: (Map<String, dynamic> message) async {
print("---------------------On Message--------------------");
displayNotification(message['data']['title'],message['data']['body']);
_saveNotificationToLocal(message);
},
onBackgroundMessage: Platform.isIOS ? null : myBackgroundMessageHandler ,
onLaunch: (Map<String, dynamic> message) async {
print("---------------------On Lunch--------------------");
_saveNotificationToLocal(message);
},
onResume: (Map<String, dynamic> message) async {
print("---------------------On Resume--------------------");
_saveNotificationToLocal(message);
},
);
}
_saveNotificationToLocal(Map<String, dynamic> message){
String sender_id = message['data']['sender_id'];
String message_id = message['data']['message_id'];
String title = message['data']['title'];
String body = message['data']['body'];
String del_time = getCurrentDateTime();
Messages msg = new Messages(sender_id,message_id,title,body,del_time);
db.saveMessages(msg);
}
String getCurrentDateTime(){
var now = new DateTime.now();
var formatter = new DateFormat('MMM d yy h:mm a');
String formatted = formatter.format(now);
return formatted;
}
/// Get the token, save it to the database for current user
_saveDeviceToken() async {
String fcmToken = await _fcm.getToken();
}
Future<void> onDidReceiveLocalNotification(
int id, String title, String body, String payload) async {
// display a dialog with the notification details, tap ok to go to another page
}
void displayNotification(String title,String body) async{
var androidPlatformChannelSpecifics = AndroidNotificationDetails(
'your channel id', 'your channel name', 'your channel description',
importance: Importance.Max, priority: Priority.High, ticker: 'ticker');
var iOSPlatformChannelSpecifics = IOSNotificationDetails();
var platformChannelSpecifics = NotificationDetails(
androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
await flutterLocalNotificationsPlugin.show(
0, '$title', '$body', platformChannelSpecifics,
payload: 'item x');
}
}
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ot.eshaar.eshaar">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.VIBRATE" />
<!-- io.flutter.app.FlutterApplication is an android.app.Application that
calls FlutterMain.startInitialization(this); in its onCreate method.
In most cases you can leave this as-is, but you if you want to provide
additional functionality it is fine to subclass or reimplement
FlutterApplication and put your custom class here. -->
<application
android:name=".Application"
android:label="eshaar"
android:icon="@mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="@style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- This keeps the window background of the activity showing
until Flutter renders its first frame. It can be removed if
there is no splash screen (such as the default splash screen
defined in @style/LaunchTheme). -->
<meta-data
android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
android:value="true" />
<meta-data
android:name="com.google.firebase.messaging.android.channel_id"
android:value="mmne" />
<meta-data android:name="com.google.firebase.messaging.default_notification_channel_id" android:value="@string/default_notification_channel_id"/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
<intent-filter>
<action android:name="FLUTTER_NOTIFICATION_CLICK" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"></action>
</intent-filter>
</receiver>
<receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationReceiver" />
</application>
</manifest>
扑打医生-v
[✓] Flutter (Channel stable, v1.9.1+hotfix.6, on Mac OS X 10.14.4 18E226, locale
en-US)
• Flutter version 1.9.1+hotfix.6 at /Users/mahmoudabdelaziz/Desktop/flutter
• Framework revision 68587a0916 (3 months ago), 2019-09-13 19:46:58 -0700
• Engine revision b863200c37
• Dart version 2.5.0
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/mahmoudabdelaziz/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling
support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /Applications/Android
Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build
1.8.0_152-release-1343-b01)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 11.0)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 11.0, Build version 11A420a
• CocoaPods version 1.8.4
[!] Android Studio (version 3.4)
• Android Studio at /Applications/Android Studio.app/Contents
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build
1.8.0_152-release-1343-b01)
[✓] IntelliJ IDEA Community Edition (version 2018.3.3)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
• Flutter plugin version 31.3.4
• Dart plugin version 183.5153.38
[✓] Connected device (1 available)
• Android SDK built for x86 • emulator-5554 • android-x86 • Android 9 (API
28) (emulator)
推荐答案
已经很晚了，但我还是会回应其他人的帮助.
It's late but still I'll respond for others to be helpful.
这里的问题与处理无关，而与您从Firebase控制台发送的消息类型有关.仅当消息是数据消息或带有数据有效负载的通知消息时，才会调用 onBackgroundMessage callBack.
The issue here isn't with the handling but with type of message you are sending from the Firebase console.
onBackgroundMessage callBack is called only if the message is a data message or a notification message with a data payload.
并确保您的消息中还添加了 click_action:'FLUTTER_NOTIFICATION_CLICK'.
And make sure your message also have click_action: 'FLUTTER_NOTIFICATION_CLICK' added.
从Firebase控制台生成消息也存在一些问题，因此请尝试直接从服务器生成消息.有关更多详细信息，请查看此线程.
And there as well is some issue with generating messages from Firebase console, so try to generate messages directly from your server. For more details please checkout this thread.
这篇关于[Firebase Messaging]:当应用程序在后台运行时，不会调用Background Message Handler方法吗?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
