android - 当应用程序在后台时更新 Firebase 推送通知

Question

如何在应用程序处于后台时更新包含数据负载的 Firebase 推送通知？有没有办法在发送给 Firebase API 的通知中指定通知 ID？

我向 firebase api 请求 json。

{
"registration_ids": ["device id"], 
"collapse_key": "Updates Available"
"notification": {
                    "title": "title", 
                    "desc": "description",
                    "body": "Message received", 
                    "sound": "TYPE_NOTIFICATION",
                    "click_action": "sometargetAction"
                },
"data":         {
                    "user": 
                    {
                        "id": 2
                        "name":"leapingwolf", 
                        "occupation": "passionate coder"
                    }
                }
}

当应用程序在 onMessageReceived 函数中处于前台时，我使用“用户”的 ID 附加到传递的推送通知

        User user = remoteMessage.getData().get("user");
        Gson gson = new GsonBuilder().create();
        User userModel =  gson.fromJson(user, User.class);
        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setContentTitle("FCM Message With Payload")
                .setContentText(messageBody)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        notificationManager.notify(userModel.getId(), notificationBuilder.build());

完整项目在github https://github.com/akshatashan/FirebaseCloudMessagingDemo

Answer 1

我根据链接中发布的答案找到了解决方案 How to handle notification when app in background in Firebase

总而言之，如果请求json没有notification标签，那么无论app是否在后台，都会调用onMessageReceived。发送数据标签中的所有相关字段并在 onMessageReceived 中解析。