Question

我有一个应用程序应该显示抬头通知，而应用程序在前台和后台（不在历史记录中）。

在前景的情况下，我通过以下方法实现了这一点。

PendingIntent pendingIntent = PendingIntent.getActivity(ctx, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
    builder.setFullScreenIntent(pendingIntent,true);

但在后台，它总是显示在通知区域。任何人都可以告诉如何在背景中实现这一点（不是在历史中）

我尝试使用以下参数进行通知但无法正常工作。

{ 
    "to" : "_Token_", 
    "priority":"high",
    "data":
    {
        "title": "Test",
        "text": "Fcm"
    },
    "notification":
    {
        "title": "Test",
        "text": "Fcm"
    }
}

Answer 1

Firebase允许在使用数据消息时进行通知自定义。即使在backgroud中的应用程序中，数据消息也会调用onMessageReceived（）方法，因此您可以创建自定义通知。

您可以参考此链接以了解有关数据通知的更多信息 Firebase notifications

Answer 2

您应该从Json中完全删除通知部分，只使用数据！这就是诀窍。我的意思是：

{ 
"to" : "_Token_", 
"priority":"high",
"data":
{
    "title": "Test",
    "text": "Fcm"
}
}

当您的Json中有通知标记时，库有时会决定自己处理通知。因此，当您的应用程序位于前台时，它不会调用您的消息接收器并显示通知本身。

只需删除通知并始终使用数据标记。

当您的应用处于前台/后台或被杀死并停止

时，它都有效

Answer 3

而不是使用setFullScreenIntent（），试试这个：

PendingIntent pendingIntent = PendingIntent.getActivity(ctx, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
builder.setPriority(NotificationCompat.PRIORITY_MAX);
builder.setSound(URI_TO_SOUND);
builder.setVibrate(ARRAY_WITH_VIBRATION_TIME);

编辑：对于背景你应该做simillar。为了显示单挑通知，应该有高优先级+声音和/或振动（最好是两者）的组合。

Edit2：您最好在onMessageReceived（）方法中显示此通知，此处：https://firebase.google.com/docs/cloud-messaging/android/receive#override-onmessagereceived

Answer 4

{
  "to":"push-token",
    "priority": "high",
    "notification": {
      "title": "Test",
      "body": "Mary sent you a message!",
      "sound": "default",
      "icon": "youriconname"
    }
}

检查出来：Create Heads-Up Display

Answer 5

您需要添加侦听器服务，就像在标准GCM实现中一样。



    public class MyGcmListenerService extends GcmListenerService {

        private static final String TAG = "MyGcmListenerService";

        /**
         * Called when message is received.
         *
         * @param from SenderID of the sender.
         * @param data Data bundle containing message data as key/value pairs.
         *             For Set of keys use data.keySet().
         */
        // [START receive_message]
        @Override
        public void onMessageReceived(String from, Bundle data) {
            String message = data.getString("message");
            Log.d(TAG, "From: " + from);
            Log.d(TAG, "Message: " + message);

            if (from.startsWith("/topics/")) {
                // message received from some topic.
            } else {
                // normal downstream message.
            }

            // [START_EXCLUDE]
            /**
             * Production applications would usually process the message here.
             * Eg: - Syncing with server.
             *     - Store message in local database.
             *     - Update UI.
             */

            /**
             * In some cases it may be useful to show a notification indicating to the user
             * that a message was received.
             */
            sendNotification(message);
            // [END_EXCLUDE]
        }
        // [END receive_message]

然后，在AndroidManifest.xml标记中注册您的接收器以侦听传入的通知：

    public class MyGcmListenerService extends GcmListenerService {

        private static final String TAG = "MyGcmListenerService";

        /**
         * Called when message is received.
         *
         * @param from SenderID of the sender.
         * @param data Data bundle containing message data as key/value pairs.
         *             For Set of keys use data.keySet().
         */
        // [START receive_message]
        @Override
        public void onMessageReceived(String from, Bundle data) {
            String message = data.getString("message");
            Log.d(TAG, "From: " + from);
            Log.d(TAG, "Message: " + message);

            if (from.startsWith("/topics/")) {
                // message received from some topic.
            } else {
                // normal downstream message.
            }

            // [START_EXCLUDE]
            /**
             * Production applications would usually process the message here.
             * Eg: - Syncing with server.
             *     - Store message in local database.
             *     - Update UI.
             */

            /**
             * In some cases it may be useful to show a notification indicating to the user
             * that a message was received.
             */
            sendNotification(message);
            // [END_EXCLUDE]
        }
        // [END receive_message]

这种方式 - 对于应用程序处于前台与后台的情况，您不必单独处理传入的消息。

https://developers.google.com/cloud-messaging/

如何在应用程序不在前台时使用Firebase云消息传递（通知）在Android中获取Heads Up通知？

5 个答案: