在收到的Firebase通知（FCM）上打开应用程序 [英] Open app on firebase notification received (FCM)

问题描述

我想在收到通知时自动打开应用程序，这是可以通过Firebase和新的FCM通知？

我知道我可以设置click_action，但这只适用于自定义哪些活动将开始通知点击，我需要的东西，会收到通知时自动启动。

我试着快速启动消息传递的Firebase示例，并有一个onMessageReceived（）方法，但它只适用于应用程序在前台。有什么东西会执行而应用程序在后台以及？
GCM可以通过直接启动广播接收器中的活动意图来实现我想要的功能，当接收到通知时调用它。

解决方案

快速回答：

要通过FCM自动打开应用程序，您需要使用数据消息 ，它保证总是调用 FirebaseMessagingService.onMessageReceived（）方法。

然后你可以添加你的逻辑 .onMessageReceived（）方法启动首选活动。 警告：没有任何用户交互的UI对于大多数应用程序来说是非常糟糕的做法！请阅读 MarkG 答案：
如何从服务启动一个活动？

[...]中断用户目前正在做的是被认为是糟糕的设计形式，尤其是从应该在后台运行的东西。因此，你应该考虑使用通知来启动所需的活动，当用户决定是时候进行调查了。 [b]

详细解释：

GCM，可以收到两种类型的消息：
$ b $ ol

display-messages：
有效负载
{notification：{body：hello world}}

这些消息在应用程序处于后台时自动显示，如果应用程序已经在前台，它们会调用 FirebaseMessagingService.onMessageReceived（）。

：value1}}

这些消息始终会被调用 FirebaseMessagingService.onMessageReceived（） ，

，即使应用程序已关闭或处于后台。

click_action code>是通知有效载荷的参数，因此它适用于显示信息。



表示与a用户点击通知。

如果设置了该选项，则当用户点击通知时，会启动匹配意图过滤器
的活动。

https://firebase.google.com/docs/cloud-messaging/http-server-ref#notification-payload-support

I want to open application automatically when notification is received, is this possible with Firebase and new FCM notifications?

I know I can set click_action but that's only for customizing which activity will start on notification click, I need something that will start automatically when notification is received.

I tried the quick start messaging firebase sample and there is a onMessageReceived() method but it only works if the app is in foreground. Is there something that will execute while app is in background as well? GCM could do something like what I want here by directly starting activity intent from broadcast receiver which is called when notification is received.

解决方案

Quick answer:

To automatically open an application via FCM you need to use a data-message, which guarantees to always invoke the FirebaseMessagingService.onMessageReceived() method.

Then you can add your logic in the .onMessageReceived() method to start the preferred activity.

WARNING: launching a UI without any user interaction is a very very bad practice for most of the applications! Please read the MarkG answer here: How to start an Activity from a Service?

[...] Interrupting what the user is currently doing is considered bad design form, especially from something that is supposed to be operating in the background.
Therefore, you should consider using a Notification [...] to launch the desired Activity when the user decides it is time to investigate. [...]

Full explaination:

FCM works similarly to GCM and can receive two types of messages:

1. display-messages:
   payload {"notification" : { "body" : "hello world"}}
   These messages are automatically displayed when the app is in background and they call FirebaseMessagingService.onMessageReceived() if the app is already in foreground.
   
   
2. data-messages:
   payload {"data" : { "key1" : "value1"}}
   These messages always invoke FirebaseMessagingService.onMessageReceived(),
   even if the app is closed or in background.

click_action is a parameter of the notification payload, thus it applies to the display-messages.

Indicates the action associated with a user click on the notification.
If this is set an activity with a matching intent filter is launched when user clicks the notification.

https://firebase.google.com/docs/cloud-messaging/http-server-ref#notification-payload-support

这篇关于在收到的Firebase通知（FCM）上打开应用程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！