[android] Android: remove notification from notification bar

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 ??

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.

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());
        }
    }

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);

Please try this,

public void removeNotification(Context context, int notificationId) {      
    NotificationManager nMgr = (NotificationManager) context.getApplicationContext()
            .getSystemService(Context.NOTIFICATION_SERVICE);
    nMgr.cancel(notificationId);
}

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());`

Just call ID:

public void delNoti(int id) {((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).cancel(id);}

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

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.

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...!!

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);
}