如何设置PopupMenuDivider颜色的样式？

<style name="PopupMenuStyle" parent="@android:style/Widget.PopupMenu">
    <item name="android:popupMenuStyle">@style/MyPopupMenu</item>
</style>

<style name="MyPopupMenu" parent="@android:style/Widget.PopupMenu">
    <item name="android:popupBackground">@android:color/white</item> <!-- 设置弹出菜单的背景色 -->
    <item name="android:popupAnimationStyle">@android:style/Animation.PopupMenu</item> <!-- 设置弹出菜单的动画样式 -->
    <item name="android:popupDivider">@drawable/my_divider</item> <!-- 设置弹出菜单的分割线样式 -->
</style>

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <size android:height="1dp" /> <!-- 设置分割线的高度 -->
    <solid android:color="#FF0000" /> <!-- 设置分割线的颜色 -->
</shape>

PopupMenu popupMenu = new PopupMenu(context, anchorView);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    popupMenu.setPopupStyle(R.style.PopupMenuStyle);
}
popupMenu.inflate(R.menu.popup_menu);
popupMenu.show();