Is it possible for me to get all of the notifications from my app that's currently in the system tray?
I noticed we can update existing notifications that are already in the tray, but I am wondering if it's possible for me to retrieve all of them.
http://developer.android.com/guide/topics/ui/notifiers/notifications.html#Updating
Thanks
The short answer is "No", the Notification Manager does not provide a way to query the notifications currently in the tray.
If you want to keep track of your notifications in the tray, it is possible, but will take a little bit of work. You will need to create a way to track the status of your notifications, the easiest way is probably a database. What you do is insert a row for the notification, with that notification's id, when you create the notification. Next, you need to build an Activity or Service that will update your database with the status of your notification during its lifecycle. Before posting your notification to the manager, you need to add a contentIntent and a deleteIntent that route through the Activity or Service you just created. The contentIntent will be called when the user clicks the notification, and the deleteIntent will be called if the user dismisses it. When either of those happen, update your database to track the latest state!
If you implement that, you'll have a way to track your notifications, and their status in the tray. Unfortunately, there is no easy, readily available way to query them, especially if they're not of your creation.
Try this NotificationListenerService:
https://developer.android.com/reference/android/service/notification/NotificationListenerService
Related
In android, some apps post a notification when an event occurs (for example when your receive a message).
But until you dismiss this notification or open the app to see this event, the app will continue to post notifications about the same event.
In my app I only want to react once to a specific event.
When the NotificationListenerService notify me of a notification how can i check if it's the first one or one of the following repeated ones ?
Thanks.
You need to store the notification's specific details in local database after every notification that will notify.Then upon new notifications you need to check if that notification already exists in database if exists then don't notify it if it doesn't exits notify it and don't forget to store it to database after notifying.
Hope this logic would help you. That's how i did it in my application.
My little app sends some notifications. We get a callback via a Pendingintent when the notification is clicked on. However, when a notification is simply removed without being clicked on, I don't get any kind of notification and thus wouldn't know if a notification has been removed by the user.
My ultimate goal is to limit the number of active notifications sent by my app to no more than 3. But I haven't been able to find a way to enumerate or simply get the count of active notifications sent by my app. The number of methods available in NotificationManager is rather limited.
Any help will be appreciated.
You can set a PendingIntent with setDeleteIntent() which will be called when the notification is removed from the notification tray (such as when the user swipes to dismiss it).
Do note that the notification design guidelines state:
If a notification of a certain type is already pending when your app tries to send a new notification of the same type, combine them into a single summary notification for the app. Do not create a new object.
A summary notification builds a summary description and allows the user to understand how many notifications of a particular kind are pending.
I.e., don't do this:
Do this (this example uses an InboxStyle notification as is recommended):
Make sure you are not posting multiple notifications of the same type.
the method "Notification.deleteIntent" you can use to set a PendingIntent which the notification was removed by system will be called .And then you can do something you want .
is there any way to clear notifications from Notification Tray all(including third party applications also).
how can i achieve this functionality can u please help me.
Thank you
From this.
The user clicks the notification, and you called setAutoCancel() when
you created the notification.
You call cancel() for a specific
notification ID. This method also deletes ongoing notifications.
You
call cancelAll(), which removes all of the notifications you
previously issued.
Note: You can't cancel notifications from other apps - its done that way to prevent malicious apps from hiding other applications.
My application displays event notifications, and I'm looking for a way to have notification aggregation.
Meaning, I would like to show 4 notification, but if the fifth comes, I would like to collect all notifications and show only one general notification.
Os there a way to know how many live notifications i have?
Is it possible to approach these notification and cancel them?
Thanks!
According to the android design guidelines you should stack your notifications. So you should avoid showing multiple notification for the same app.
You can stack your notifications using
NotificationManager.notify(ID, notification) where you specify same ID for each notification.
You can check the docs on how to implement it.
For your case
Is there a way to know how many live notifications i have - No
But you can keep a track of the notifications using Shared Preferences, where you store the ID of the notificaion and remove it when the user clicks on the notificaion
Is it possible to approach these notification and cancel them? - Yes
You can cancel a notification using the cancel(int id) method, where you pass the ID of the notification to be removed.
So you can use this method to acheive what you want, but it advisable to stack all the notifications.
I have an alarm application where users can set multiple alarms. When an alarm goes off the app simply displays a Notification which when clicked will launch the main activity screen and remove the Notification.
Each alarm gets its own Notification which is where my question comes in; if there are multiple Noitifications showing, when the user clicks one I would like to clear all of my app's Notifications. To do this I need to track the IDs of the Notifications currently showing. What is the recommended way of doing this?
I suppose these will need to be persisted as my app's process could be killed as soon as a Notification has been created and displayed. Is my thinking correct?
To do this I need to track the IDs of the Notifications currently showing.
Or just call cancelAll() on NotificationManager, to cancel all your outstanding notifications.
What is the recommended way of doing this?
To be safe, you should use some persistent data store (e.g., file), as your process might go poof between alarms.
I suppose these will need to be persisted as my app's process could be killed as soon as a Notification has been created and displayed. Is my thinking correct?
It could certainly be killed before the next alarm, as discussed in your other recent question.