setgroup() in notification not working

Question

I\'m tring to create notification group, this is my code:

 // Build the notification, setting the group appropriately
 Notification notif = new NotificationC         


        

Answer 1

You have to create a group notification before creating your custom notification. Just like this:

NotificationCompat.Builder groupBuilder =
            new NotificationCompat.Builder(context)
                    .setContentTitle(title)
                    .setContentText(content)
                    .setGroupSummary(true)
                    .setGroup("GROUP_1")
                    .setStyle(new NotificationCompat.BigTextStyle().bigText(content))
                    .setContentIntent(pendingIntent);

Do not forget setGroupSummary to true.

Then create your child notification which group value is same to groupBuilder's value。Here is "GROUP_1".

NotificationCompat.Builder builder =
            new NotificationCompat.Builder(context)
                    .setSmallIcon(R.drawable.ic_stat_communication_invert_colors_on)
                    .setContentTitle(title)
                    .setContentText(content)
                    .setGroup("GROUP_1")
                    .setStyle(new NotificationCompat.BigTextStyle().bigText(content))
                    .setContentIntent(pendingIntent)

Finally use NoticationManagerCompat to notify them.

    NotificationManagerCompat manager = NotificationManagerCompat.from(context);
    manager.notify(GROUP_ID, groupBuilder.build());
    manager.notify(id, builder.build());

Answer 2

Replace

NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(++NOTIFICATION_ID, notif);

with

NotificationManagerCompat.from(mCtx).notify(++NOTIFICATION_ID,notif);

because you are using NotificationCompat