execute expects a full URL (including https) but notice that the action event can fire more than once in valid cases so you shouldn't do things like opening a URL. For validation it should be OK though. You can use something like regex validator or just implement the constraint interface and add a constraint.
Here's a sample of a validator: https://stackoverflow.com/questions/50122768/regex-error-codename-one-project -- You received this message because you are subscribed to the Google Groups "CodenameOne Discussions" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/codenameone-discussions. To view this discussion on the web visit https://groups.google.com/d/msgid/codenameone-discussions/74aba865-9f24-44de-a720-511159ec9b99%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
