How can I read existing notifications on Android? I want to be able to grab all the pending/existing notifications, parse them, and try to grab any information them. For instance, if my device had notifications from an SMS app, then I want to be able to read whatever information I could (if possible) from the notification. Is this possible?
Note that I am NOT asking for an active notification listener/receiver. I just want to be able to parse existing notifications on-demand.
Thanks in advance!
On devices with Android 4.3 and newer (API level 18) it is possible to use the NotificationListenerService and its function getActiveNotifications() to get a list of all outstanding notifications visible to the user. You can also react on each new notification by using onNotificationPosted.
On older devices, the only way to get access to the android notifications is to implement an AccessibilityService to react on incoming TYPE_NOTIFICATION_STATE_CHANGED-events.
Related
For implementing notifications on Android TV below points needs clarification
As I have gone through SO and other articles, Android TV doesn't have notification tray,
Hence Notification has to be handled in a custom way. Therefore, please clarify:
Can we use Notification Manager.
Proper method to implementation Android TV notification.
Can we set the Notification priority
Possible way to find out whether the user has seen/interacted with notification or not
Handling list of notification messages by Local Database or any other method.
Any help would be much appreciated.
Notifications on Android TV OS are significantly different than mobile Android. There is an area to display notifications within the launcher, but it is limited to system-level notifications that are important for the user (e.g., issues with your account or info about OS updates). General app notifications do not show up, which means you need to display any kind of notification within your own app UI and not with the regular NotificationManager and related APIs.
Can we use Notification Manager. / Can we set the Notification priority
Yes, but it won't result in a notification being visible to the user and shouldn't be done on Android TV OS.
Proper method to implementation Android TV notification.
This should be handled within app UI. Most apps have a reserved space to show these on the main screen so that users see them as soon as they open the app.
Possible way to find out whether the user has seen/interacted with notification or not
Since you'll have to display it in your own UI, you can use regular View methods. For example, if you want to know if the user clicked the message, you can add that code to the OnClickListener.
Handling list of notification messages by Local Database or any other method.
This is a bit vague to give a specific answer, so you may want to post a separate question with more details about what you're trying to accomplish. One general way to go about it is that you have a server endpoint that understands the state of notifications for a given user and you sync that with your local database (easiest is probably Sqlite using Room). Your UI needs to be told if there's a relevant notification to display within the app, but the details of that depend on your app architecture.
I wonder how to push notifications to my Flutter app users in both Android and iOS devices Without using any external service like Firebase or OneSignal?
I want to implement a code in PHP which can send push real time notifications to all/spesific users in my Flutter app which works in both Android and iOS.
I found some solutions like flutter_local_notifications with workmanger which can fetch the API in the background only minimum 15 minuts. Workmanger is Not good solution because its work only during 15 min and it will consume the battery and internet.
I need an efficient solution to my flutter app for both Android & iOS devices, which can listen on real time to the coming messages from the server even when the app is closed.
How to fix that? thanks
iOS
You will always need to integrate with Apple's Push Notification Server (APNS) if your app needs make API calls in the background. The reason is that once an app is put into the background, iOS will often put the app to sleep soon afterwards.
The correct approach to this is to use a silent push notification to wake up the app. When received, no message is shown on device but the app get's about 30 seconds in order to make API calls.
In your case, the app can make the API call and then schedule a local push notification to display your message.
Background updates via push notifications
Scheduling local push notifications
Android
It looks like WorkManager is your best bet. I don't see how it can affect battery.
FYI
You don't need to use Firebase or OneSignal for push notifications, silent or otherwise. They are simply 3rd party services that interact with the official Apple or Google Push Notification Servers.
Unfortunately, I think this is not possible. Even OneSignal uses the Firebase API to deliver the notifications, as you can see here. For all other solutions, you will have to balance the update frequency with internet use and battery consumption.
We have been trying for the last two weeks to get a reliable solution to try and sync our app data with a server in the background. We have tried the Background fetch mechanism but due to the iOS restrictions on when it runs it is not a viable solution.
iOS does provide Remote Notifications (https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/pushing_background_updates_to_your_app?language=objc) that we would like to use as we can use the same mechanism on Android.
The issues is that when sending a type 2 notification CN1 only delivers the notification when the app is brought to the foreground by the user.
On Android I see there is a Build Hint for android.background_push_handling that allows the notifications to be sent to the app even if it is in the background.
Is there a similar build hint that we can use for iOS?
If not, is there a way then to override the application:didReceiveRemoteNotification:fetchCompletionHandler: method that fires when the Notification arrives so that we can forward it to our app?
You can use silent push notifications for that purpose. To send a silent push notification you just have to include "content-available" : 1" into the body of the notification. More info on that here: Apple docs-silent push notifications
You should bear in mind that this will only work when your app is in the background, it won't work when the app is killed. When the app is killed the only solution is standard push notifications, unless your app has VoIP functionality, in which case you are allowed to use PushKit framework (if you use it in an app without VoIP functionality, you won't get pass the AppStore).
Is there a way to find if the "Show notification" for app is enabled or disabled?
I have a requirement where I need to check and enable or disable notifications.
When you see the details of the any app, example in the link
http://www.trickyways.com/wp-content/uploads/2014/05/show-notifications-disabled.png
there is an option to disable notifications. Is there any function or method in Android with which I can extract this
I have seen articles that it can't be done for 4.0, wondering if there is any update for 4.4 and above
The solution is for API Level >= 18.
You can include NotificationListenerService in your project which allows you to listen to all the Notifications that are posted on the phone.
So whenever your application posts a new notification NotificationListenerService will get a callback. So, if you are posting a notification and NotificationListenerService is not getting a callback, it means user has blocked the notifications for your application.
Note that user needs to explicitly grant your application Notification Access Permission in order for your application to access the notifications.
I'm currently working on app that read certain notifications and then silencing some of them. I've managed doing this using NotificationListenerService on Android 4.3+ but I would like to make it compatible for previous versions too. So is there anyway to listening to incoming notifications and getting its content?
I heard about AccesibilityService but I don't quite understand if it is possible to use it to read notifications' content and how. Any suggestions?
Thanks from adavnce!
It's possible with the accessibility service (event 64)
You can get at the notification object from this and then parse it.
There's a sample class of parsing the notification here: http://notifications-widget.googlecode.com/svn/trunk/NotificationsWidget/src/com/roymam/android/notificationswidget/NotificationParser.java