public static void showContactOnMap(Context ctx,ContactId contact){
  Set<ContactId> set=new HashSet<>();
  set.add(contact);
  showContactsOnMap(ctx,set);
}

public static void showContactOnMap ( Context ctx , ContactId contact ) { Set < ContactId > set = new HashSet < > ( ) ; set . add ( contact ) ; showContactsOnMap ( ctx , set ) ; }
show geolocation for a one contact
