Can Android apps automatically receive push notification content when it's delivered while the app is in foreground? - android

I'm an iOS developer and this behavior is natural in iOS. If the app is in foreground and there's push notification for the app, the app will receive the push notification content instead of the OS create push notification in the notification center. Now I want to help my fellow Android developer to do the same, but we don't know where to look. As far as he knows, Android app will never receive push notification unless the user tap on the push notification, even if the app is in foreground. We need this so we can refresh the chat screen when we receive push notification from the server that a new chat message is coming. Can this behavior emulated in Android? All this time, the way he retrieved new chat message is that every 5 seconds he queries the server for new messages.

Related

How WhatsApp receive Push Notification when app is killed (Need to implement in flutter)

Don't dislike my Questions, explain how other apps are doing or how I can achieve this.
I want to know how WhatsApp and Instagram similar apps received notifications when the app is closed or killed. Even if I restart my device and enable Wi-Fi it automatically start showing new notification in real-time.
I don't want FCM (Firebase Push Notification) because I am creating a chat app in Flutter (android/ios) that needs instant push notification for a real-time chat even app is killed or the device restarted. And neither background service because if I restart my device background service will stop running.
I want solutions like WhatsApp, Snapchat, and Instagram for real-time chat push notifications for a chat in a flutter
.

Mass push notification sending in some intervals

I am trying to figure out how Facebook / Twitter sends push notifications like "You have 20 new followers"I don't know how to call it but i want to learn the underlying algorithm of this in Android. Please help, Thanks !
On Android you can execute your code before actually showing a push notification. They could simply send a push notification to all devices with an identifier, then the app can make a request to the server and get the needed information in order to show the push notification.
They can also send one push notification per device, as they can associate the push notification key with the user login, and the server would fire a push notification every time there is an event that demands a push notification.
But there are also other ways of doing this, for example, they can, for example run locally in background and create a local notification when the app decides it is necessary.

how to get push notification payload data when the app is in background in ionic framework,

Hi I'm able to get the push notification in my ionic android app. I can get the push notification when app is running or in background or closed.
I am alerting the notification payload data. When app is running when I send the push notification to the app I'm getting the alert with payload data.
When the app is in background or closed I get the notification. When I tap on the notification in the notification tray (i got to the app via notification tray ). I get the alert in the app when app opens.
But when app is in background or closed, I get the notification but when I got to the app via app icon or recent apps(not tapping the notification in the tray) I cannot get the alert.
I want to get the payload data when I go to the app by tapping the icon or recent apps too.
Please help me.

What is the difference of "Notification" and "Push Notification" in Android

I want to use Notification in my Android app but I don't know what is the difference between Notification and Push Notification in Android.
I searched the web about this title but all of them talk about differences in apple products.
Can anyone remark where I should use Notification and where I should use Push Notification?
The main difference between push notification and notification is that the latter are created internally from an application on the device that wants to show user some information, a reminder, some news or updates, and so on. Push notification are "messages" sent from outside the device, for example a server, that triggers an application of the device (which usually handle the incoming message and transform it in a "normal" notification to be displays in the system tray). This is usually made through a public service such as Firebase Cloud Message ( https://firebase.google.com/docs/cloud-messaging/ ) of Google or a proprietary service such as the one that is used by the most common chatting application (Whatsapp, Telegram, ...) .
Indeed the most common example of push notification is the whatsapp notification of new messages that shows up in your phone when another user has sent you a message (so the message comes from outside your phone). Instead, the basic example for normal notifications are the alarm's notifications or the calendar's notifications.
Notification: When notifies you about the same application state, example: In a game application: "You have 10 days trial, or a product that provides the application".
Push Notification: When notifies you in real time about events related to users, eg solical In an application, "A message from a friend, a new invitation, an event".

How are Android GCM push notifications processed?

I am working on a Cordova Android app that handles push notifications using the PushPlugin. The app will correctly receive push notifications when the app is open. However no push notifications are received (or at least handled) if the app is not open.
This makes some sense given that the plugin has code that specifically handles receiving push notifications. What does not make much sense to me is why this code even exists at all. Before building this app, I assumed that the OS had some sort of queuing system that received any/all notifications.
Does a notification queue exists in Android that handles push notifications for all apps or does each app need to handle the notifications on their own.
Can Android apps process push notifications while closed?
Can Cordova Android apps process push notifications while closed?
In Google Cloud Messaging (which is the push notifications mechanism used by the PushPlugin) each application decides how to handle the notification. When a push notification arrives to the device, GCM triggers a BroadcastReceiver in the recipient application, and the application is responsible for handling the notification data.
Android apps can process push notifications when closed unless they are explicitly stopped by the user (in which case no notifications will reach the app until it is restarted again by the user). If they leave the foreground by the user switching to another app or going to the home screen, the can still receive and process notifications.
Yes. According to the PushPlugin you posted a link to, it seems that they can. When the app is not in the foreground, the notification is handled differently - a notification is added to the notification bar, and when it is tapped, it should open the app.
With PushPlugin, when sending push notifications to GCM (for GCM to send them to the device) one has to include a msgcnt key value pair after the message key value pair in the payload value in the JSON message, like this:
{
"GCM":"{\"data\":{\"message\":\"hello\",\"msgcnt\":\"1\"}}"
}
or else PushPlugin will not handle the notification when the app is in the background. It has to do with the way the GCMIntentService.java file is written in the plugin.

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