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I'm currently working on a library with android support.
I'm being asked to notify user on foreground service start.
The notification must contain "ApplicationName" as title, and "ApplicationName is running" as text. The notification icon has to be the same as the launcher one.
The target API level is 26.
The notification did not work because the previous developper forgot to open the notification chanel. This is now fixed, we have the notification that pops correctly. And the label are matching expectation.
But now i'm questioning why the notification contains the expected values. I could not find any reference in the javadoc.
The following code will display the notification as expectecd the application's name as title and the text "ApplicationName is running" :
#Override
public void onCreate() {
NotificationChannel channel = new NotificationChannel("APPLICATION_CHANNEL", "MyService", NotificationManager.IMPORTANCE_LOW);
channel.setDescription(notificationChannelText);
//block below useful for head up notification
channel.setSound(null, null);
channel.setShowBadge(false);
channel.enableLights(false);
channel.enableVibration(false);
NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(channel);
}
#Override
public int onStartCommand(final Intent intent, final int flags, final int startId) {
foregroundNotification();
return Service.START_STICKY;
}
/**
* In order to start foreground service we and generate a service running notification.
*/
private void foregroundNotification() {
Context context = getApplicationContext();
Intent notificationIntent = new Intent(context, getClass());
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
Notification notification = new Notification.Builder(context, "APPLICATION_CHANNEL")
.setContentTitle("Title")
.setContentText("Subject")
.setContentIntent(pendingIntent)
.build();
startForeground(42666, notification);
}
Why doesn't it just display a notification with "Title" as the title and "Subject" as content ?
Are there any constants or magic values that we have to know ?
Where can we find any documentation or definition about it ?
Edit 2020/04/01 : Added code representing notification channel creation
I found your problem. This is result of your code:
and after add small icon:
.setSmallIcon(R.mipmap.ic_launcher)
It works fine
Is it possible to clear a notification programatically?
I tried it with the NotificationManager but its not working.
Is there any other way I can do it?
Use the following code to cancel a Notification:
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);
In this code there is alway the same id used for notifications. If you have different notifications that need to be canceled you have to save the ids that you used to create the Notification.
From: http://developer.android.com/guide/topics/ui/notifiers/notifications.html
To clear the status bar notification when the user selects it from the Notifications window, add the "FLAG_AUTO_CANCEL" flag to your Notification object. You can also clear it manually with cancel(int), passing it the notification ID, or clear all your Notifications with cancelAll().
But Donal is right, you can only clear notifications that you created.
Since no one has posted a code answer to this:
notification.flags = Notification.FLAG_AUTO_CANCEL;
.. and if you already have flags, you can OR FLAG_AUTO_CANCEL like this:
notification.flags = Notification.FLAG_INSISTENT | Notification.FLAG_AUTO_CANCEL;
Please try methods provided in NotificationManagerCompat.
To remove all notifications,
NotificationManagerCompat.from(context).cancelAll();
To remove a particular notification,
NotificationManagerCompat.from(context).cancel(notificationId);
Starting with API level 18 (Jellybean MR2) you can cancel Notifications other than your own via NotificationListenerService.
#TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
public class MyNotificationListenerService extends NotificationListenerService {...}
...
private void clearNotificationExample(StatusBarNotification sbn) {
myNotificationListenerService.cancelNotification(sbn.getPackageName(), sbn.getTag(), sbn.getId());
}
If you are generating Notification from a Service that is started in the foreground using
startForeground(NOTIFICATION_ID, notificationBuilder.build());
Then issuing
notificationManager.cancel(NOTIFICATION_ID);
does not end up canceling the Notification, and the notification still appears in the status bar. In this particular case, you will need to issue
stopForeground( true );
from within the service to put it back into background mode and to simultaneously cancel the notifications. Alternately, you can push it into the background without having it cancel the notification and then cancel the notification.
stopForeground( false );
notificationManager.cancel(NOTIFICATION_ID);
Notification mNotification = new Notification.Builder(this)
.setContentTitle("A message from: " + fromUser)
.setContentText(msg)
.setAutoCancel(true)
.setSmallIcon(R.drawable.app_icon)
.setContentIntent(pIntent)
.build();
.setAutoCancel(true)
when you click on notification, open corresponding activity and remove notification from notification bar
I believe the most RECENT and UPDATED for AndroidX and backward compatibility. The best way of doing (Kotlin and Java) this should be done as:
NotificationManagerCompat.from(context).cancel(NOTIFICATION_ID)
Or to cancel all notifications is:
NotificationManagerCompat.from(context).cancelAll()
Made for AndroidX or Support Libraries.
If you're using NotificationCompat.Builder (a part of android.support.v4) then simply call its object's method setAutoCancel
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
builder.setAutoCancel(true);
Some guys were reporting that setAutoCancel() did not work for them, so you may try this way as well
builder.getNotification().flags |= Notification.FLAG_AUTO_CANCEL;
Note that the method getNotification() has been deprecated!!!
// Get a notification builder that's compatible with platform versions
// >= 4
NotificationCompat.Builder builder = new NotificationCompat.Builder(
this);
builder.setSound(soundUri);
builder.setAutoCancel(true);
this works if you are using a notification builder...
Actually as answered before starting with API Level 18 you can cancel Notifications posted by other apps differet than your own using NotificationListenerService but that approach will no longer work on Lollipop, here is the way to remove notifications covering also Lillipop API.
if (Build.VERSION.SDK_INT < 21) {
cancelNotification(sbn.getPackageName(), sbn.getTag(), sbn.getId());
}
else {
cancelNotification(sbn.getKey());
}
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager Nmang = (NotificationManager) getApplicationContext()
.getSystemService(ns);
Nmang .cancel(getIntent().getExtras().getInt("notificationID"));
All notifications (even other app notifications) can be removed via listening to 'NotificationListenerService' as mentioned in NotificationListenerService Implementation
In the service you have to call cancelAllNotifications().
The service has to be enabled for your application via:
‘Apps & notifications’ -> ‘Special app access’ -> ‘Notifications access’.
this code worked for me:
public class ExampleReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
int notificationId = 1;
notificationManager.cancel(notificationId);
}
}
A function written in Kotlin:
/**
* Delete the notification
*/
fun delete(context: Context, notificationId: Int) =
with(NotificationManagerCompat.from(context)) {
cancel(notificationId)
}
Or shorter:
fun delete(context: Context, notificationId: Int) = NotificationManagerCompat.from(context).cancel(notificationId)
If you use OneSignal, you must use one of this:
Specific notification:
OneSignal.removeNotification(mutableNotification.androidNotificationId)
All notifications:
OneSignal.clearOneSignalNotifications()
In OneSignal's java doc says:
For removeNotification
Cancels a single OneSignal notification based on its Android notification integer ID. Use
* instead of Android's {#link NotificationManager#cancel(int)}, otherwise the notification will be restored
* when your app is restarted.
For clearOneSignalNotifications
If you just use
* {#link NotificationManager#cancelAll()}, OneSignal notifications will be restored when
* your app is restarted.
To clear notifications on Oreo and greater versions
//Create Notification
Notification.Builder builder = new Notification.Builder(this, NOTIFICATION_CHANNEL_ID)
.setContentTitle(getString(R.string.app_name))
.setAutoCancel(true);
Notification notification = builder.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
createNotificationChannel(builder, notificationManager);
mNotificationManager=notificationManager;
startForeground(1, notification);
//Remove notification
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
mNotificationManager.deleteNotificationChannel(NOTIFICATION_CHANNEL_ID);
}
Is it possible to clear a notification programatically?
I tried it with the NotificationManager but its not working.
Is there any other way I can do it?
Use the following code to cancel a Notification:
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);
In this code there is alway the same id used for notifications. If you have different notifications that need to be canceled you have to save the ids that you used to create the Notification.
From: http://developer.android.com/guide/topics/ui/notifiers/notifications.html
To clear the status bar notification when the user selects it from the Notifications window, add the "FLAG_AUTO_CANCEL" flag to your Notification object. You can also clear it manually with cancel(int), passing it the notification ID, or clear all your Notifications with cancelAll().
But Donal is right, you can only clear notifications that you created.
Since no one has posted a code answer to this:
notification.flags = Notification.FLAG_AUTO_CANCEL;
.. and if you already have flags, you can OR FLAG_AUTO_CANCEL like this:
notification.flags = Notification.FLAG_INSISTENT | Notification.FLAG_AUTO_CANCEL;
Please try methods provided in NotificationManagerCompat.
To remove all notifications,
NotificationManagerCompat.from(context).cancelAll();
To remove a particular notification,
NotificationManagerCompat.from(context).cancel(notificationId);
Starting with API level 18 (Jellybean MR2) you can cancel Notifications other than your own via NotificationListenerService.
#TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
public class MyNotificationListenerService extends NotificationListenerService {...}
...
private void clearNotificationExample(StatusBarNotification sbn) {
myNotificationListenerService.cancelNotification(sbn.getPackageName(), sbn.getTag(), sbn.getId());
}
If you are generating Notification from a Service that is started in the foreground using
startForeground(NOTIFICATION_ID, notificationBuilder.build());
Then issuing
notificationManager.cancel(NOTIFICATION_ID);
does not end up canceling the Notification, and the notification still appears in the status bar. In this particular case, you will need to issue
stopForeground( true );
from within the service to put it back into background mode and to simultaneously cancel the notifications. Alternately, you can push it into the background without having it cancel the notification and then cancel the notification.
stopForeground( false );
notificationManager.cancel(NOTIFICATION_ID);
Notification mNotification = new Notification.Builder(this)
.setContentTitle("A message from: " + fromUser)
.setContentText(msg)
.setAutoCancel(true)
.setSmallIcon(R.drawable.app_icon)
.setContentIntent(pIntent)
.build();
.setAutoCancel(true)
when you click on notification, open corresponding activity and remove notification from notification bar
I believe the most RECENT and UPDATED for AndroidX and backward compatibility. The best way of doing (Kotlin and Java) this should be done as:
NotificationManagerCompat.from(context).cancel(NOTIFICATION_ID)
Or to cancel all notifications is:
NotificationManagerCompat.from(context).cancelAll()
Made for AndroidX or Support Libraries.
If you're using NotificationCompat.Builder (a part of android.support.v4) then simply call its object's method setAutoCancel
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
builder.setAutoCancel(true);
Some guys were reporting that setAutoCancel() did not work for them, so you may try this way as well
builder.getNotification().flags |= Notification.FLAG_AUTO_CANCEL;
Note that the method getNotification() has been deprecated!!!
// Get a notification builder that's compatible with platform versions
// >= 4
NotificationCompat.Builder builder = new NotificationCompat.Builder(
this);
builder.setSound(soundUri);
builder.setAutoCancel(true);
this works if you are using a notification builder...
Actually as answered before starting with API Level 18 you can cancel Notifications posted by other apps differet than your own using NotificationListenerService but that approach will no longer work on Lollipop, here is the way to remove notifications covering also Lillipop API.
if (Build.VERSION.SDK_INT < 21) {
cancelNotification(sbn.getPackageName(), sbn.getTag(), sbn.getId());
}
else {
cancelNotification(sbn.getKey());
}
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager Nmang = (NotificationManager) getApplicationContext()
.getSystemService(ns);
Nmang .cancel(getIntent().getExtras().getInt("notificationID"));
All notifications (even other app notifications) can be removed via listening to 'NotificationListenerService' as mentioned in NotificationListenerService Implementation
In the service you have to call cancelAllNotifications().
The service has to be enabled for your application via:
‘Apps & notifications’ -> ‘Special app access’ -> ‘Notifications access’.
this code worked for me:
public class ExampleReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
int notificationId = 1;
notificationManager.cancel(notificationId);
}
}
A function written in Kotlin:
/**
* Delete the notification
*/
fun delete(context: Context, notificationId: Int) =
with(NotificationManagerCompat.from(context)) {
cancel(notificationId)
}
Or shorter:
fun delete(context: Context, notificationId: Int) = NotificationManagerCompat.from(context).cancel(notificationId)
If you use OneSignal, you must use one of this:
Specific notification:
OneSignal.removeNotification(mutableNotification.androidNotificationId)
All notifications:
OneSignal.clearOneSignalNotifications()
In OneSignal's java doc says:
For removeNotification
Cancels a single OneSignal notification based on its Android notification integer ID. Use
* instead of Android's {#link NotificationManager#cancel(int)}, otherwise the notification will be restored
* when your app is restarted.
For clearOneSignalNotifications
If you just use
* {#link NotificationManager#cancelAll()}, OneSignal notifications will be restored when
* your app is restarted.
To clear notifications on Oreo and greater versions
//Create Notification
Notification.Builder builder = new Notification.Builder(this, NOTIFICATION_CHANNEL_ID)
.setContentTitle(getString(R.string.app_name))
.setAutoCancel(true);
Notification notification = builder.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
createNotificationChannel(builder, notificationManager);
mNotificationManager=notificationManager;
startForeground(1, notification);
//Remove notification
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
mNotificationManager.deleteNotificationChannel(NOTIFICATION_CHANNEL_ID);
}
On lollipop, If the user has a pin set then some notifications aren't able to be swiped away. they act like a persistent notification when attempting to be dismissed.
Some apps notifications are able to be swiped away on the lockscreen without unlocking.
I have only tested this with hide sensitive notification content, does a flag set change this ability?
How do I achieve this?
This flag makes your notification stick:
Notification.FLAG_ONGOING_EVENT;
If you leave it out you can remove it. If you put it in, it sticks.
FYI: How I make my notifications:
//These are parameters for setting up the tag in the tray
private static final String NOTIFICATION_ID_TAG="notificationID";
private static final int NOTIFICATION_ID=123456;
public void createNotification() {
// Prepare intent which is triggered if the
// notification is selected
Intent intent = new Intent(this, MainActivity_Host.class);
intent.putExtra(NOTIFICATION_ID_TAG, NOTIFICATION_ID);
PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent, 0);
// Build notification
Notification noti = new Notification.Builder(this)
.setContentTitle("Service Running")
.setContentText("The service is running").setSmallIcon(R.mipmap.ic_launcher)
.setContentIntent(pIntent)
.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
//THIS FLAG MAKES THE NOTIFICATION STICK = YOU CAN'T SWIPE IT AWAY... IF YOU LEAVE IT OUT YOU CAN REMOVE THE NOTIFICATION
noti.flags |= Notification.FLAG_ONGOING_EVENT;
notificationManager.notify(NOTIFICATION_ID, noti);
}
This is how you can remove the notification from within the code:
//Erase the notification that we set up when the service started
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);
As you see, you can get the notification from the NotificationManager by the NOTIFICATION_ID you used to make it. This is just a number i made up.
I have created an application and with an event I manage to add notification in android notification bar. Now I need sample how to remove that notification from notification bar on an event ??
You can try this quick code
public static void cancelNotification(Context ctx, int notifyId) {
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager nMgr = (NotificationManager) ctx.getSystemService(ns);
nMgr.cancel(notifyId);
}
This is quite simple. You have to call cancel or cancelAll on your NotificationManager. The parameter of the cancel method is the ID of the notification that should be canceled.
See the API: http://developer.android.com/reference/android/app/NotificationManager.html#cancel(int)
You can also call cancelAll on the notification manager, so you don't even have to worry about the notification ids.
NotificationManager notifManager= (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notifManager.cancelAll();
EDIT : I was downvoted so maybe I should specify that this will only remove the notification from your application.
this will help:
NotificationManager mNotificationManager = (NotificationManager)
getSystemService(NOTIFICATION_SERVICE);
mNotificationManager.cancelAll();
this should remove all notifications made by the app
and if you create a notification by calling
startForeground();
inside a Service.you may have to call
stopForeground(false);
first,then cancel the notification.
simply set setAutoCancel(True) like the following code:
Intent resultIntent = new Intent(GameLevelsActivity.this, NotificationReceiverActivityAdv.class);
PendingIntent resultPendingIntent =
PendingIntent.getActivity(
GameLevelsActivity.this,
0,
resultIntent,
PendingIntent.FLAG_UPDATE_CURRENT
);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
getApplicationContext()).setSmallIcon(R.drawable.icon)
.setContentTitle(adv_title)
.setContentText(adv_desc)
.setContentIntent(resultPendingIntent)
//HERE IS WHAT YOY NEED:
.setAutoCancel(true);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(547, mBuilder.build());`
If you are generating Notification from a Service that is started in the foreground using
startForeground(NOTIFICATION_ID, notificationBuilder.build());
Then issuing
notificationManager.cancel(NOTIFICATION_ID);
does't work canceling the Notification & notification still appears in the status bar. In this particular case, you will solve these by 2 ways:
1> Using stopForeground( false ) inside service:
stopForeground( false );
notificationManager.cancel(NOTIFICATION_ID);
2> Destroy that service class with calling activity:
Intent i = new Intent(context, Service.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
if(ServiceCallingActivity.activity != null) {
ServiceCallingActivity.activity.finish();
}
context.stopService(i);
Second way prefer in music player notification more because thay way not only notification remove but remove player also...!!
A short one Liner of this is:
NotificationManagerCompat.from(context).cancel(NOTIFICATION_ID)
Or to cancel all notifications is:
NotificationManagerCompat.from(context).cancelAll()
Made for AndroidX or Support Libraries.
Please try this,
public void removeNotification(Context context, int notificationId) {
NotificationManager nMgr = (NotificationManager) context.getApplicationContext()
.getSystemService(Context.NOTIFICATION_SERVICE);
nMgr.cancel(notificationId);
}
Use the NotificationManager to cancel your notification. You only need to provide your notification id
mNotificationManager.cancel(YOUR_NOTIFICATION_ID);
also check this link
See Developer Link
NotificationManager.cancel(id) is the correct answer. Yet you can remove in Android Oreo and later notifications by deleting the whole notification channel. This should delete all messages in the deleted channel.
Here is the example from the Android documentation:
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// The id of the channel.
String id = "my_channel_01";
mNotificationManager.deleteNotificationChannel(id);
It will help you
private var notificationManager = NotificationManagerCompat.from(this)
notificationManager.cancel("your_notification_id")
If you start notification foreground like this
startForeground("your_notification_id",notification.build())
Then you should stop foregroundservice also
notificationManager.cancel("your_notification_id")
stopForeground(true)
On Android API >=23 you can do somehting like this to remove a group of notifications.
for (StatusBarNotification statusBarNotification : mNotificationManager.getActiveNotifications()) {
if (KEY_MESSAGE_GROUP.equals(statusBarNotification.getGroupKey())) {
mNotificationManager.cancel(statusBarNotification.getId());
}
}
Just call ID:
public void delNoti(int id) {((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).cancel(id);}