An elderly man is looking for Adam Devine.

He doesn’t care that he’s walking through a movie set in the Castro neighborhood, approaching the director’s chair as if he’s part of the cast, while crew members exchange glances. This man just wants to meet a celebrity.

“Where’s Adam?” the man asks. “The big guy, the main star!”

他的目标是傻笑的喜剧演员the Comedy Central series “Workaholics” and films including the “Pitch Perfect” series. But today, a sunny January Wednesday, Devine is playing the role of a phone-obsessed guy living in San Francisco in the film “Lexi,” which is being helmed by “Bad Moms” directors Jon Lucas and Scott Moore, and described as what happens when a man loves his smartphone’s AI more than anything else in his life. Or, maybe, as much as this fan seems to be smitten with Devine, who was across the street in front of a bike shop, filming a scene for the comedy, which has no release date.

Producer Suzanne Todd defuses the situation, escorting the fan away from the set, before he could meet Devine, who was playing hacky sack and fiddling around on a bike between takes. “This is why I love shooting in San Francisco,” Devine said moments later, spotting a pedestrian dressed in colorful wizard clothing. “This is just a Wednesday for him — that’s Halloween for anyone else.”

After two weeks of overcast skies, during which the cast and crew had been filming all over San Francisco, the day’s weather was perfect for a pivotal outdoor scene. A satire of our phone-obsessed culture, the movie rolls into motion on this Castro street after the protagonist, Phil (Devine), runs into Cate (Alexandra Shipp, from the “X-Men” franchise) and drops his phone, leading to the purchase of a new device whose invasive AI system (voiced by Rose Byrne) attempts to take over his life.

“This is really a movie about a guy who is looking down and learns to look up and see that the world is beautiful,” said co-director Lucas, citing San Francisco, where the film is set, as the appropriate location because it is both a home for big tech and a city defined by its distinct visual landscapes.

But despite its premise, “Lexi” isn’t waving a sanctimonious finger with its message about technology reliance. After all, Lucas and Moore are a duo behind R-rated comedies. “It’s not serious at all,” Todd said. “Like we like to say about the ‘Bad Moms’ movies: It’s kind of like 95 percent raunchy fun and 5 percent vegetables.”

Devine also said that the film avoids being preachy, though he riffed with Shipp about the bizarre examples and consequences of tech obsessions in our lives: relationships tend to be doomed; people flake more often; certain ads on Devine’s phone all but guarantee that it listens in on his conversations.

“When I was a little kid, my mom would tell me, ‘Don’t talk to strangers on the internet. Don’t get in a car with strangers. Don’t take candy from strangers,’ ” he said. “And now, you get on the internet to call a car to come pick you up, with a stranger driving you who offers you candy.”

“Sometimes. Only the good ones offer you candy,” Shipp countered, before Devine qualified his joke.

“That’s a meme that I think I stole from, but I’ll take full credit for it.”

The pair, whose meeting in the scene being shot that day eventually develops into a love interest, traded jokes with an easy chemistry. While 100 or so crew members maneuvered between takes — long breaks that, for the actors, involved considerable standing, waiting and staring — the two spoke about the importance of having an agreeable scene partner.

“She could be mad stinky, and that’d be off-putting, but luckily I think they hose her down,” Devine joked.

“Every morning,” Shipp said.

Ironically, phones appeared largely absent on the busy set. But on camera, Devine repeated the moment of Phil dropping and desperately clutching his phone, screaming more absurdly over his beloved device each take.

“It’s always weird when you watch a movie, especially movies that happen nowadays, and you’re like, no one’s on their phones!” Devine said. “Thor would be on his phone. He’s always touching his hammer and beating people up. He would be tweeting stuff.”