long when = System.currentTimeMillis();
    NotificationManager notificationManager = (NotificationManager) context
            .getSystemService(Context.NOTIFICATION_SERVICE);

    // Create an explicit intent for an Activity in your app
    Intent intent = new Intent(context, NotificationActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP  | Intent.FLAG_ACTIVITY_NEW_TASK)
            .putExtra("id_notifica", id_notifica);
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

    Intent intent_si = new Intent(context, NotificationYesActivity.class);
    intent_si.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK)
            .putExtra("id_notifica", id_notifica);
    PendingIntent pendingIntent_si = PendingIntent.getActivity(context, 1, intent_si, 0);

    Intent intent_post = new Intent(context, NotificationPosticipaActivity.class);
    intent_post.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP  | Intent.FLAG_ACTIVITY_NEW_TASK)
            .putExtra("id_notifica", id_notifica);
    PendingIntent pendingIntent_post = PendingIntent.getActivity(context, 2, intent_post, 0);


    //Alarm Sound
    Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

    String channelId = "Your_channel_id";
    NotificationChannel channel = null;
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
        channel = new NotificationChannel(channelId,
                "Channel human readable title", NotificationManager.IMPORTANCE_DEFAULT);
        notificationManager.createNotificationChannel(channel);

    }

    NotificationCompat.Builder mNotifyBuilder = new NotificationCompat.Builder(
            context, channelId).setSmallIcon(R.drawable.logocartella)
            .setContentTitle("Promemoria farmaco")
            .setContentText("Hai preso " + id_farmaco + " alle " + notify_time + "?")
            .setSound(alarmSound)
            .setWhen(when)
            .addAction(0, "Si", pendingIntent_si) // #0
            .addAction(0, "Posticipa", pendingIntent_post)
            .setAutoCancel(true)
            .setWhen(when)
            .setContentIntent(pendingIntent)
            .setVibrate(new long[]{1000, 1000, 1000});

    notificationManager.notify(id_notifica, mNotifyBuilder.build());

int notificationID = getIntent().getIntExtra("id_notifica", 0);