当应用程序在后台运行时调用 onMessage 方法 [英] Call onMessage method when the app is in background in flutter

问题描述

我是颤振和飞镖的新手.我正在尝试将我的应用与 FCM.当应用程序在前台时，我创建了 flutterLocalNotificationsPlugin 并且一切正常，但是当我的应用程序在后台时，我不知道如何处理 onMessage 方法.有人知道我该如何解决吗?

I'm new in flutter and dart. I'm trying to connect my app with FCM. When app is in foreground I create flutterLocalNotificationsPlugin and everything works fine, but I don't how to handle onMessage method when my app is in background. Have somebody any idea how I can resolve it?

FirebaseMessaging firebaseMessaging = new FirebaseMessaging();
FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = new FlutterLocalNotificationsPlugin();

@override
void initState() {
 super.initState();

 var androidInitSettings = new AndroidInitializationSettings('mipmap/ic_launcher');
 var iosInitSettings = new IOSInitializationSettings();
 var initSettings = new InitializationSettings(androidInitSettings, iosInitSettings);
 flutterLocalNotificationsPlugin.initialize(initSettings, selectNotification: onSelectNotification);

 firebaseMessaging.configure(
   onLaunch: (Map<String, dynamic> msg) {
     print(" onLaunch called ${(msg)}");
   },
   onResume: (Map<String, dynamic> msg) {
     print(" onResume called ${(msg)}");
   },
   onMessage: (Map<String, dynamic> msg) {
     showNotification(msg);
     print(" onMessage called ${(msg)}");
   },
 );
 firebaseMessaging.requestNotificationPermissions(const IosNotificationSettings(sound: true, alert: true, badge: true));
 firebaseMessaging.onIosSettingsRegistered.listen((IosNotificationSettings setting) {
   print('IOS Setting Registed');
 });
 firebaseMessaging.getToken().then((token) {
   update(token);
 });
}

推荐答案

根据上一个插件 Firebase Cloud Messaging for Flutter 版本 4.0.0+1，当你在控制台或表单上创建或编译您的推送通知确保包含

click_action: FLUTTER_NOTIFICATION_CLICK 

定位 Android 设备时作为自定义数据"键值对(在高级选项"下).此选项在您的应用处于后台状态时启用 onResume.

as a "Custom data" key-value-pair (under "Advanced options") when targeting an Android device. This option enabling the onResume when your app is in background state.

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