[FAQ] how do HMS core push services and local creation notification messages overlap each other?

We know , Use alone HMS Core Push service Or create notification messages locally , Can realize the coverage of notification messages , The methods are ：

1、 Create notification messages locally （ Local notification message ）

adopt notificationManager.notify(notifyId, notification) Set the same notifyId That is to say .

2、HMS Core Push service Send a notification message （ Huawei push notification message for short ）

Use HMS Core Push service api Message sent , By setting notify_id, That is, the unique identification of each message when the notification is displayed .notify_id When not carried or set -1 when ,Push NC Automatically generate a unique identifier for each message , Messages will not be overwritten ; Set the same notifyId, You can realize the function of covering the previous message with a new message .

** Although the above two implementations can be used alone , But sometimes there are scenes , Local notification messages and Huawei push notification messages can overlap each other .** For example, push notification messages through Huawei , Remind users of changes in the price of goods of interest , If the user has purchased , At this time, the local notification message can be set to be the same as the Huawei push notification message notify_id value , Update the recommendation message to the logistics information of the commodity order , Meet the special use scenarios of the application .

Step summary

1、 Huawei push notification message , The title is ： Huawei push service test message , Content ： The price of the goods you subscribe to changes ,notify_id：10;

2、 Local notification message , title ： Test local notification entry channels localNotification, Content ：\uD83D\uDCE6 You have a courier coming at a high speed \uD83D\uDE80, Click to view the express information , You can also set the receiving method >>>,notifyId：10;

3、 Huawei push notification message , title ： Huawei push service test message , Content ： The goods you purchased have been signed for ,notify_id：10.

Detailed process

First , Developers need to access push services , Please refer to The official link

After the client accesses the push service , Get... Through the client Push Token, And then you can use Push Returned by the server Push Token Push messages to applications .

HMS Core Push server sample code ：

{    "validate_only": false,    "message": {        "android": {            "notification": {                "click_action": {                    "type": 3                },                "notify_id": 10            }        },        "notification": {            "body": " The price of the goods you subscribe to changes ",            "title": " Huawei push service test message "        },        "token": ["your push token"]    }}

Local application client sample code （Kotlin）：

val manager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager

// Create a send message channel ,“localNotification”

        var channelId = "localNotification"        if(Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O){            var importance =   NotificationManager.IMPORTANCE_HIGH;            var notificationChannel = NotificationChannel(channelId,channelId,importance)            notificationChannel.enableVibration(true)            notificationChannel.setShowBadge(true)           if(manager != null){               manager.createNotificationChannel(notificationChannel)           }        }

// Send message to channel channelId

			```			    val mBuilder = NotificationCompat.Builder(this@MainActivity,channelId)    mBuilder.setContentTitle(" Test local notification entry channels $channelId") // Set notification bar title         .setContentText("\uD83D\uDCE6 You have a courier coming at a high speed \uD83D\uDE80, Click to view the express information , You can also set the receiving method >>>")         .setWhen(System.currentTimeMillis())        .setPriority(Notification.PRIORITY_DEFAULT)         .setAutoCancel(true)        .setDefaults(Notification.DEFAULT_VIBRATE)         .setSmallIcon(R.mipmap.ic_launcher_round)     val notification = mBuilder.build()    manager.notify(10, notification) // there notifyId With Huawei pushing notification messages notify_id Same value , To achieve the same notifyId/notify_id Overwrite the notification message 						```

The effect is as follows ：

From the above effect example , It can be seen that , By keeping notifyId And notify_id Same value , The local notification message can overwrite the previous Huawei push notification message , meanwhile , Huawei push notification message can also overwrite the previous local notification message , Thus, the mutual coverage function of local notification message and Huawei push notification can be realized .

matters needing attention

When creating a notification message locally , Such as notificationManager.notify(notifyId, notification), Set up notifyId With Huawei pushing notification messages notify_id Field values are the same , You can realize the mutual coverage of local notification messages and Huawei push notification messages .

It should be noted that , The same application settings are the same notifyId/notify_id Notice of , Cover according to the display order , That is, the message displayed after overwrites the message displayed before . meanwhile , Huawei pushes notify_id Field , Need to meet EMUI Version in 9.1.0 And above 、 The push service application version is in 9.1.1 And above , To take effect .

Learn more >>

visit Official website of Huawei developer Alliance
obtain Development guidance document
Huawei mobile service open source warehouse address ：GitHub、Gitee

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