Android : how to pass value from adapter class to fragment how actvity

public static String receiverId ;
public class Notifcationadapter extends BaseAdapter {

public static 
    DataBaseManager dbManager = new DataBaseManager(context);
    ArrayList<Notify> notifies;

    public Notifcationadapter(Context context, ArrayList<Notify> notifies) {
        super();
        this.context = context;
        this.notifies = notifies;

    }

    /* private view holder class */
    private class ViewHolder {

        TextView txtTitle;
        TextView txtDesc;
        ImageView yesimage;

        ImageView noimage;
        TextView revresetime;

        TextView rejected;
        ImageView notificationuserimage;
        RelativeLayout relativeLayout;
    }

    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater mInflater = (LayoutInflater) context
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);


        final DataBaseManager dbManager = new DataBaseManager(context);
        final String isRead = notifies.get(position).getNotificationIsRead();
        final String dateTime = notifies.get(position)
                .getNotificationDatetime();
        final String desc = notifies.get(position).getNotificationDescrpiton();
        final String id = notifies.get(position).getNotificationId();
        receiverId = notifies.get(position).getNotificationRecieverID();
        ((HomeActivity) context).NotifcationRecciverid = notifies.get(position)
                .getNotificationRecieverID();
        ((HomeActivity) context).nOtifcationMessge = notifies.get(position)
                .getNotificationDescrpiton();

        final String senderId = notifies.get(position)
                .getNotificationSenderID();
        final String serverId = notifies.get(position)
                .getNotificationServerId();
        final String status = notifies.get(position).getNotificationStatus();
        final String type = notifies.get(position).getNotificationType();
}
}

This is My code of Adapter class am able to get value from database of receiver id i want to pass this value to another actvity so that i can compare it but am getting null value when i pass to another :

am using like this :

String value =Notifcationadapter.receiverId;
        markerOptions.title(datamodel.contactName);
        if (datamodel.id
                .equals(Notifcationadapter.receiverId)) {
            markerOptions
                    .snippet(((HomeActivity) getActivity()).nOtifcationMessge);
            map.addMarker(markerOptions).showInfoWindow();

        } else {
            markerOptions.snippet(datamodel.phoneNumber);
            // Adding marker on the Google Map
            map.addMarker(markerOptions);
        }

    }

this code am using to compare value but here am getting value null of receiver id please help suggest me where am doing wrong please tell me how i will pass value from one to another