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.
Related
I'm using Firebase Cloud Messaging for Android. When my app is in the foreground, FCM will invoke onMessageReceived on my app's FirebaseMessagingService subclass.
When my app is in the background, the Android OS will create a default notification entry in the system tray. That notification entry looks pretty good to me; for the notifications I need to send, I don't particularly need to interrupt the user with the notification. The default notification in the system tray is just fine.
My question is, how do I make that "default" notification happen in onMessageReceived when my app is in the foreground? Is there a way to say, "I don't need to intercept this notification; please just do what you'd normally do if I were in the background"?
(Do I have to simulate it by hand with NotificationCompat.Builder? If so, which settings do I need to pass to get default behavior?)
When the app is in the background, your notifications are processed by the Google Services, which takes care of displaying your notifications as required, including the default click action (opening the app) and the notification icon.
When the app is in the foreground, the received messages are processed by the app.
Yes, you will have to mimic the NotificationCompat.Builder to look like default. There is no other way to do this without intercepting with onMessageReceived() callback.
Reference: https://firebase.google.com/docs/cloud-messaging/android/receive
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.
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
Is it possible to make an icon on android that when clicked clears all notifications, e.g. SMS, email, missed calls etc?
I just want an icon on my home screen that clears all notifications. What coding would I use?
cancel(notificationID) where you pass the notification id of the notification you have created
or else, you can clear all your notifications by cancelAll().
*NOTE : * Only notifications created by your application can be deleted. You cannot remove notifications created by some other application.
You can only remove a Notification that you raise yourself. You cannot remove a Notification raised by another application.
I could not find a way to receive events for any notifications like email, SMS, battery charged, etc.. which is appearing on the notification bar.
Note: I could receive events for sms, email, etc.. but I am looking for a event trigger when notification bar is get updated by any app
your suggestions and advices are highly appreciated
You need to create an AccessibilityService and set it to listen to TYPE_NOTIFICATION_STATE_CHANGED events. This way, each time any of the application packages specified while configuring the AccessibilityService generates a new notification, the onAccessibilityEvent callback of your service will be called with all the information about the notification.
you can't read info from the notifications bar.
you'll need to try and listen for broadcast for events for every type you want (in casse they exist - not all of the apps send broadcast when they send a messege to the notifications bar)
I think it's impossible. The start point is NotificationManager, but it doesn't offer an API to listen for all notifications.