Question

我需要帮助。 Firebase通知在后台不起作用。这是我的代码：

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {

    Log.d(TAG, "FROM:" + remoteMessage.getFrom());
   sharedPreference = getSharedPreferences(Global.SECURETRADE, 0);
    UID = sharedPreference.getString(Global.ID, "");


        Uri defaultSoundUri=RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)`enter code here`;

        NotificationCompat.Builder notificationBuilder = new
                NotificationCompat.Builder(this);

        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

            notificationBuilder.setSmallIcon(R.mipmap.small_secure_trade_app_icon);

        } else {

            notificationBuilder.setSmallIcon(R.drawable.small_secure_trade_app_icon);
        }

        notificationBuilder.setLargeIcon(BitmapFactory.decodeResource(this.getResources(), R.drawable.securetrade_icon));
        notificationBuilder.setContentTitle(remoteMessage.getData().get("title"));
        notificationBuilder.setContentText(remoteMessage.getData().get("body"));
        notificationBuilder.setAutoCancel(true);
        notificationBuilder.setSound(defaultSoundUri);
        notificationBuilder.setContentIntent(pendingIntent);

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

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

    }




}

Answer 1

是的，除非您通知您的服务器代码，否则Firebase不会在应用程序处于后台时调用onMessageReceived（）。

查看此答案 https://stackoverflow.com/a/40083727/4620609

Answer 2

当app处于后台或被杀时，您必须使用数据有效负载进行通知。 Firebase onMessageReceived not called when app in background

Answer 3

您是要发送数据消息（而不是通知消息）吗？

通知消息不要致电onMessageReceived()

当您希望FCM处理显示时，请使用通知消息代表您的客户端应用程序发送通知。在您使用时使用数据信息想要处理客户端应用上的消息。

在此处阅读更多内容：https://firebase.google.com/docs/cloud-messaging/concept-options#notifications_and_data_messages

PS：FCM Web控制台始终发送通知消息

如果您要发送数据信息，则不会调用onMessageReceived() ...
那么这是一个不同的问题。

甚至可能是该特定设备的问题见Push notifications using FCM not received when app is killed android

Answer 4

只需删除＆＃39;通知＆＃39;您通过推送通知发送的json部分。只需发送＆＃39;数据＆＃39; section，onMessageReceived将正常工作

Answer 5

当在后台onMessageReceive中运行的应用无效时

离线消息进入启动器活动只需在您的启动器活动中复制此代码，然后进行检查即可。它会工作。

    Bundle bundle = getIntent().getExtras();
    if (bundle != null) {
        Logger.info(TAG, "FIRE BASE OFF LINE NOTIFICATIONS COMING TO THIS BLOCK--->");

        JSONObject json = new JSONObject();
        Set<String> keys = bundle.keySet();
        for (String key : keys) {
            Logger.info(TAG, "json object--->" + key + "---values--" + JSONObject.wrap(bundle.get(key)));
        }
    }

你的有效负载应该是这样的

{ "notification": {
    "title": "Your Title",
    "text": "Your Text",
     "click_action": "OPEN_ACTIVITY_1" // should match to your intent filter
  },
    "data": {
    "keyname": "any value " //you can get this data as extras in your activity and this data is optional
    },
  "to" : "to_id(firebase refreshedToken)"
}

reference

Firebase通知无法在后台运行

5 个答案: