No sooner had the Knicks’ practice ended in Greenburgh on a rainy Thursday than J.R. Smith was exiting stage left, far away from the media’s questions and faster than you can say “Under my umbrella, ella, ella.” The Knick shooting guard’s latest foray into front-page headlines had him partying with singer Rihanna late Tuesday night at a SoHo club only hours after he went 3-for-15 with eight points in the Knicks’ Game 2 playoff win over Indiana. But if Smith’s extracurricular activities are making news, so far they aren’t raising the eyebrows of his longtime Nuggets and Knicks teammate, Carmelo Anthony. “I don’t want to speak on that. To me, he’s focused now,” Anthony said on Thursday, when asked if Smith was partying too much. “Whatever he’s doing in his spare time, he does in his spare time. My thing to J.R. is I want him to remain positive, regardless of what’s going on off the court, what’s being said about him.” After Thursday’s practice, Woodson was more supportive, saying he has “faith” that Smith will “eventually break loose. “Shooters go through it. (Smith) has just gotta think every time he pulls up to shoot his shot, or he goes to the rim, that he’s gonna make the shot,” Woodson said. “You can’t back away from it. We’ve all gone through it as players throughout our careers. I got faith and I believe in J.R. and eventually he’ll break loose. When he does, he’ll be back to J.R. again and that’s gonna help us even more.”