NotificationManager.cancel(id) is not working inside a broadcast receiver

Question

Android: I am trying to cancel a notification from the notification bar after a package being installed. What I am doing is the following:

 public class MyBr         


        

Answer 1

I was facing the same issue recently. I have managed to solve it.

So from what i understood.

1) use the id which is basically a random number to notify and send this same id to the piece of code(reciever/activity...) where you want to cancel it.

2) When using tags, it seems to not work for me as i was giving one tag to all notifications but with unique id.It worked only on the first tag. so i completely avoided using tags. If you want to use tags, issue unique tags along with unique id and use them both while cancelling.

So final answer... what i used and what works for me:

STEP 1:
int notif_id = (int)(System.currentTimeMillis()%10000);

STEP2: add this id inside the action intent (I am launching an activity where the notification gets cancelled on the action click):

                Intent notificationSettingsIntent = new Intent(context.getApplicationContext(), NotificationSettingsActivity.class);
                notificationSettingsIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
                notificationSettingsIntent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
                notificationSettingsIntent.putExtra("fromNotification",true);
                notificationSettingsIntent.putExtra("notif_id",notif_id);
                PendingIntent notificationSettingsActivityPendingIntent = PendingIntent.getActivity(context,notif_id,notificationSettingsIntent,PendingIntent.FLAG_ONE_SHOT);

STEP 3: notify using the id in the step 1 but with no tags

NotificationManagerCompat notificationCompat = NotificationManagerCompat.from(context.getApplicationContext());

notificationCompat.notify(notif_id,notificationBuilder.build());

Now in the Activity which gets opened by my action click, i cancel the notification as:

NotificationManagerCompat notificationCompat = NotificationManagerCompat.from(context.getApplicationContext());

notificationCompat.cancel(getIntent().getIntExtra("notif_id"));

Works every time now.