Android的FCM - 如何显示只有一个通知

问题描述

我从FCM向Android设备发送推送通知，这是通过向包含JSON主体的FCM发送一条POST消息来完成的。

如果发送相同的JSON身体两次，Android设备将显示两个通知（或三，或四，...）。但我希望它只显示一个。

collapse_key应该解决这个问题，对不对？ （）

但是在哪里或如何插入？

这个问题回答了这个问题，但没有给出例子：

当前JSON正文：

  {
notification：{ 
title：MyAPP，
body：打开MyAPP访问您的数据，
click_action：OPEN_MAINACTIVITY，
icon： 
color：＃ff0000
}，
data：{
extra1：sample1，
extra2： sample2
}，
registration_ids：[
--my_id--

} 
  

我在很多方面都尝试过t o包括collapse_key，但目前还没有运气。仍然是多个通知。任何帮助都是值得欢迎的。

解决方案

好吧，我一直在挖，找到答案：不是collapse_key，我是应该在通知中使用tag选项。

所以通过使用这个JSON，只显示一个通知：

  {
通知：{
title：MyAPP，
body：打开MyAPP来访问您的数据，
click_action：OPEN_MAINACTIVITY，
icon：ic_launcher_red，
color：＃ff0000
tag：unique_tag
}，
data：{
extra1：sample1，
extra2：sample2
}，
registration_ids ：[
--my_id--

} 
  

$ b $
$ b

b

I'm sending push notifications from FCM to an Android device, this is done by sending a POST message to FCM containing a JSON body.

If I send the same JSON body twice, the Android device will show two notifications (or three, or four, ...). But i want it to show only one.

The "collapse_key" should solve this, right? (FCM Documentation)

But where or how should it be inserted?

This SO question answers this but no example is given: Can FCM notification on Android overwrite previous one?

Current JSON body:

{
    "notification": {
        "title": "MyAPP",
        "body": "Open MyAPP to access your data",
        "click_action" : "OPEN_MAINACTIVITY",
        "icon": "ic_launcher_red",
        "color": "#ff0000"
    },
    "data": {
        "extra1":"sample1",
        "extra2":"sample2"
    },
    "registration_ids":[
        "--my_id--"
    ]
}

I have tried in many ways to include the "collapse_key" but no luck so far. Still multiple notifications. Any help is welcome.

解决方案

Well, I kept digging and found the answer: it was not the "collapse_key", i was supposed to use the "tag" option in the notification instead.

So by using this JSON only one notification is shown:

{
    "notification": {
        "title": "MyAPP",
        "body": "Open MyAPP to access your data",
        "click_action" : "OPEN_MAINACTIVITY",
        "icon": "ic_launcher_red",
        "color": "#ff0000"
        "tag": "unique_tag"
    },
    "data": {
        "extra1":"sample1",
        "extra2":"sample2"
    },
    "registration_ids":[
        "--my_id--"
    ]
}

Hope this helps others!

And if someone wishes to explain further on "collapse_key" I would be glad, clearly I misunderstood it.

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