Disable SSLHandshakeException for a single connection

I'm looking for a solution similar to this answer, but much safer. I'd like to disable the certificate validation, but for a single request only (which is all I need). So it should do one or more of the following

• return to the secure state when the one request is done
• disable validation for the given URL only
• (maybe) use the insecure settings just for one thread

Addendum

I really wonder what's wrong with this question (score -2) when compared to the original one (score +46), when I'm asking for a more secure solution. Could someone explain?

To explain why I need this: There's a valid server certificate and normally, it gets used. But I need to send one request to localhost and it has to work on a developer machine, too. It must be https as there's no http support.