Side Effects actor Law accepted £130,000 damages plus costs from News Corp in January 2012 after it emerged that his voicemail had been hacked by the News of the World.
"My life is much less harassed, thank goodness," Law told The Guardian.
"Because the root has been cut off so it doesn't feed the poisonous little plant that was growing, do you know what I mean?
"Without headlines they've no need for ridiculous photos of me opening a gate and getting into a car. So that's all gone. What a blessing!"
He added of police betrayal: "There were two instances where the police called for whatever reason and they sold the stories, telling lies."
Law continued: "What's going to be interesting, post-Leveson, is how long the head stays in the shell, how long before it pops out again. I don't know, we'll see."
Of being photographed in Hawaii on New Year's Eve, he said: "We left the beach because we couldn't play there because there were three guys sitting there taking photos of us.
"So they can pixellate all they want, but the truth of the matter is that these greaseballs are still there and we have to leave the beach and go and sit in a garden or a room or whatever."