Firebase 推送通知获得双重通知，一份默认通知和一份自定义通知

Question

try {
                var payload = {
                    //  notification: {
                    //     imageUrl: image.toString(),
                    //     body: body.toString(),
                    //     title: title.toString(),
                    // },
                    android: {
                        notification: {
                            imageUrl: image.toString(),
                            body: body.toString(),
                            title: title.toString(),
                        }
                    },
                    data: {
                        imageUrl: image.toString(),
                        body: body.toString(),
                        title: title.toString(),
                    },
                    token: tokens,
                };

                if (!admin.apps.length) {
                    admin.initializeApp({
                        credential: admin.credential.cert(serviceAccount),
                        databaseURL: stage.databaseURL
                    }, '--------');
                }

                admin.apps.find(t => t.name == '---------').messaging().send(payload)
                    .then(function (response) {
                        resolve(response)
                    })
                    .catch(function (error) {
                        reject(error)
                    });
            }
            catch (e) {
                reject(e)
            }

这是我来自节点后端的有效负载

messaging().setBackgroundMessageHandler(async remoteMessage => {
    // Handle the message, display a local notification
    console.log('onMessage in the closed!');
    if (remoteMessage.data || (remoteMessage.android && remoteMessage.android.notification)) {
        const notificationData = remoteMessage.data || remoteMessage.android.notification;
        PushNotification.localNotification({
            channelId: "------",
            message: notificationData.body,
            title: notificationData.title,
            largeIconUrl: notificationData.imageUrl,
            when: Date.now(),
        });
        // return Promise.resolve();
    }
    // return Promise.resolve();
});

messaging().onMessage(async remoteMessage => {
    console.log('onMessage in the background!', remoteMessage);
    if (remoteMessage != null) {
        FirebaseBackgroundTask(remoteMessage);
    }
});

这是我在react-native中从前端接收的端

 <service android:name="com.dieam.reactnativepushnotification.modules.RNPushNotificationListenerService" android:exported="false" android:directBootAware="true">
        <intent-filter>
          <action android:name="com.google.android.c2dm.intent.RECEIVE" />
          <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
          <action android:name="com.google.firebase.MESSAGING_EVENT" />
        </intent-filter>
      </service>
      <meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="---------" />

这是我的 androidXMl.mainfest 文件

我试图在应用程序终止时获取自定义通知，但收到 2 个通知，一个由操作系统（默认）生成，另一个是我用图像自定义的自定义通知

默认的主要问题是没有生成图像或者不是我想要的方式（获取大图片而不是图标）

Answer 1

    Please below steps when your app is terminated or in the background, handling Firebase Cloud Messageing.
1.Update AndroidManifest.xml

<service
    android:name=".YourFirebaseMessagingService"
    android:exported="false">
    <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT" />
    </intent-filter>
</service>


2.Implement a FirebaseMessagingService

public class YourFirebaseMessagingService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        // Handle the message payload here
        // You can check if the app is in the foreground, background, or terminated
        if (remoteMessage.getData().size() > 0) {
            // Handle data payload
            // You can extract values from remoteMessage.getData()
        }

        // Check if the message contains a notification payload.
        if (remoteMessage.getNotification() != null) {
            // Handle notification payload
        }
    }
}

3.Handle Notification Payload in the on MessageReceived
public void onMessageReceived(RemoteMessage remoteMessage) {
    if (remoteMessage.getData().size() > 0) {
        // Handle data payload
        // You can extract values from remoteMessage.getData()
    }

    // Check if the message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        // Handle notification payload
    }
}

4.Check App State

if (isAppInForeground()) {
    // App is in the foreground, handle the notification without showing a system notification
} else {
    // App is in the background or terminated, show a notification in the system tray
    showNotification(remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getBody());
}

Answer 2

导致此问题的可能原因有多种。您可以采取以下一些步骤来排查和解决问题：

1. 检查您的代码： 查看处理推送通知的代码。确保您没有无意中创建和发送两个单独的通知。

2. Firebase 控制台配置： 在 Firebase 控制台上仔细检查您的 Firebase 项目设置。

3. 通知负载： 检查您发送的推送通知的有效负载。确保您没有同时包含默认通知字段和自定义通知字段。

4. 在前台处理通知： 确保您处理得当。

5. 检查重复注册： 确保您的应用没有多次注册推送通知。

6. 更新 Firebase SDK

7.检查 Firebase 文档