New Orleans will also receive four second-round picks in the swap.
Maker, 21, was the 10th overall pick in the 2016 draft.
First reported by ESPN's Adrian Wojnarowski and Zach Lowe, the Bucks will be acquiring veteran forward Nikola Mirotic in a three-team deal between the Bucks, the Detroit Pistons and the New Orleans Pelicans. The 6-foot-7 small forward out of Arizona was averaging 7.5 points and 3.6 rebounds this season and in four years with the Pistons averaged 7.1 points and 3.5 rebounds.
Through 48 games played with the Pistons this year, majority coming off the bench, Johnson has averaged 7.5 points and 3.6 rebounds per game, while shooting 38 per cent from the field.
French ire as Italian deputy PM pays visit to Yellow Vest protesters
The statement continued: "Having disagreements is one thing, but manipulating the relationship for electoral aims is another". It said Italy's attacks were without precedent since World War II.
The internet erupts after the Markelle Fultz trade
Simmons , 29, is a 6-6 bench player, who is averaging just 6.9 points in 20.6 minutes per game for Orlando this season. The Philadelphia 76ers traded 2017 No. 1 overall pick Markelle Fultz to the Orlando Magic on Thursday.
PGA Picks - Pebble Beach
Mickelson is regarded as having arguably the greatest short game in golfing history but has perennially struggled with the driver. South Korean Kim Si-woo had the best score at Pebble, a 66, while American Cody Gribble was best at Spyglass, also 66.
He is making a career-high 2.7 shots from 3-point range per game.
Both Harris and star Sixers guard Jimmy Butler, acquired from Minnesota earlier this season, are free agents this off-season while Simmons is in line for a contract extension in the near future.
Johnson played one season of basketball for Arizona before being taken eighth overall by the Pistons in the 2015 draft.
Johnson is joining the league's best defensive team, and in the Bucks' fast-paced offence he may be able to impact the game with his slashing ability.
However, after showing promise last season, Maker had fallen out of head coach Mike Budenholzer's rotation and recently requested a trade. "Johnson can work to find a role on a contending team, and Maker will get an opportunity for playing time with Dwane Casey".