如何使用垂直GridLayoutManager水平居中RecyclerView项目

I have a vertical recyclerview using a gridlayoutmanager. I want each column to be centered, but the columns begin all the way on the left. In the following picture you can see what I'm talking about. I used the ugly color scheme to illustrate the columns and background. The green is the background for each item in the recyclerview, the red is the background of the recyclerview itself:I have a vertical recyclerview using a gridlayo