onMessage 数据：“RemoteMessage”实例（想在控制台上打印消息）

Question

这是我尝试从firebase messaging 发送消息时出现的错误，如果有人能向我解释如何使其正确，我将非常高兴

W/FirebaseMessaging(11937): Unable to log event: analytics library is missing
W/FirebaseMessaging(11937): Unable to log event: analytics library is missing
D/FLTFireMsgReceiver(11937): broadcast received for message
I/flutter (11937): onMessage data: Instance of 'RemoteMessage'

这是我的pushnotification.dart: 文件

import 'package:cab_driver/globalvariables.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_database/firebase_database.dart';
import 'package:firebase_messaging/firebase_messaging.dart';

class PushNotificationService {

  final FirebaseMessaging fcm = FirebaseMessaging.instance;

  Future initialize() async {
    FirebaseMessaging.instance.getInitialMessage().then((RemoteMessage message) {
      print('getInitialMessage data: $message');

    });

    FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
      print("onMessage data: $message");
    });

    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
      print('onMessageOpenedApp data: $message');

    });
  }

  Future<String>getToken() async{

    String token = await fcm.getToken();
    print('token: $token');

    DatabaseReference tokenRef = FirebaseDatabase.instance.reference().child('drivers/${currentFirebaseUser.uid}/token');
    tokenRef.set(token);

    fcm.subscribeToTopic('alldrivers');
    fcm.subscribeToTopic('allusers');
  }
}

我想打印我从 firebase 消息发送的消息，但给出与 I/flutter (11937): onMessage data: Instance of 'RemoteMessage' 相同的内容，请任何人都可以帮助我，我真的什么都不懂

Answer 1

RemoteMessage 不会覆盖 toString()，这就是您看到 Instance of 'RemoteMessage 的原因。

您可以简单地从 RemoteMessage 对象打印您想要的任何内容。例如，如果您对 data 属性感兴趣：

FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
  print("onMessage data: ${message.data}");
});

您可以为other properties in RemoteMessage 做类似的事情。