How to remove the rectangular shadow background after the menu item of NavigationView is selected?

such as the title.
for example, how to remove the shadow after the selection of the "game" menu item in the following picture?
CmNk6K.png

Mar.03,2021

read more documents or source code before asking questions

xml method:

appcompat:itemBackground="@drawable/menu_background_color" //background

Code method:

public class NavigationView extends ScrimInsetsFrameLayout {
    public void setItemBackgroundResource(@DrawableRes int resId) {}
    public void setItemBackground(@Nullable Drawable itemBackground) {}
}

ide-navigationview" rel=" nofollow noreferrer "> How to customize item background and item text color inside NavigationView?

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