android - Firebase Messaging - 在应用程序处于后台时创建抬头显示

Question

使用 FCM，当应用程序处于后台或未运行时，我会在系统托盘中收到推送通知。当应用程序位于前台时，我可以覆盖 onMessageReceived 并使用 NotificationCompat 创建我自己的提醒通知。

有没有办法在我的应用程序处于后台或未运行时创建提醒通知？

谢谢

编辑:这里的引用信息是我通过 curl 发送到 https://fcm.googleapis.com/fcm/send

的消息负载

{
  "to":"push-token",
    "content_available": true,
    "priority": "high",
    "notification": {
      "title": "Test",
      "body": "Mary sent you a message!",
      "sound": "default"
    },
    "data": {
      "message": "Mary sent you a Message!",
      "notificationKey":"userID/notification_type",
      "priority": "high",
      "sound": "default"
    }
}

Answer 1

我找到了解决方案:我只是从本地服务器发送到 firebase 服务器的 json 中删除通知标记，然后在 MyFirebaseMessagingService 中生成回调:onMessageReceived() 方法。在这种方法中，我使用 NotificationCompat.Builder 类生成本地通知。这是安卓的代码:

private void sendNotification(RemoteMessage remoteMessage) {
        Intent intent = new Intent(this, SplashActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.putExtra(AppConstant.PUSH_CATEGORY, remoteMessage.getData().get("category"));
        intent.putExtra(AppConstant.PUSH_METADATA, remoteMessage.getData().get("metaData"));
        intent.putExtra(AppConstant.PUSH_ACTIVITY, remoteMessage.getData().get("activity"));
        intent.putExtra(AppConstant.PUSH_ID_KEY, remoteMessage.getData().get("_id"));

        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(remoteMessage.getData().get("title"))
                .setContentText(remoteMessage.getData().get("body"))
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                .setContentIntent(pendingIntent);

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

        notificationManager.notify(0, notificationBuilder.build());
    }