God knowing beforehand that Adam would sin does not mean God "predestined" Adam to sin.
Here is God's Will:
Genesis 2:
16 And the LORD God commanded the man, saying, Of every tree of the garden thou mayest freely eat:
17 But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die.
According to Gen 2:17, the Will of God for Adam and Eve was do not eat.
Knowing beforehand that Adam and Eve would eat, and having the forethought in His manifold wisdom to provide for the redemption of all mankind because of Adam's and Eve's disobedience, is not the same as God creating Adam for the purpose of sinning.