我想自定义弹出菜单，背景颜色为浅黑色，文本颜色为白色。我正在使用“主题.材料组件.灯光.睡眠吧”作为父项。我试图自定义，但有一些白色的空间，从上到下在弹出式菜单。x1c 0d1x我想改变整个弹出菜单的背景。请帮

我添加->

<item name="android:itemBackground">@color/colorLightBlack</item>
 <item name="android:itemTextAppearance">@style/MyActionBar.MenuTextStyle</item>

This is My Themes.xml file ->

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.KawawaMusic" parent="Theme.MaterialComponents.Light.NoActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/black</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/black</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">@color/transparent</item>
        <!-- Customize your theme here. -->
        <item name="android:windowTranslucentStatus">true</item>
        <item name="android:windowTranslucentNavigation">true</item>
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="android:windowContentTransitions">true</item>
        <item name="android:windowAllowEnterTransitionOverlap">true</item>
        <item name="android:windowAllowReturnTransitionOverlap">true</item>
        <item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
        <item name="android:windowSharedElementExitTransition">@android:transition/move</item>
        <item name="windowNoTitle">true</item>
        <item name="bottomNavigationStyle">@style/Widget.App.BottomNavigationView</item>

        <item name="android:itemBackground">@color/colorLightBlack</item>
        <item name="android:itemTextAppearance">@style/MyActionBar.MenuTextStyle</item>
    </style>

    <style name="bottom_nav_style">
        <item name="colorPrimary">@color/white</item>
    </style>
    <style name="Widget.App.BottomNavigationView" parent="Widget.MaterialComponents.BottomNavigationView.Colored">
        <item name="materialThemeOverlay">@style/ThemeOverlay.App.BottomNavigationView</item>
    </style>

    <style name="ThemeOverlay.App.BottomNavigationView" parent="">
        <item name="colorPrimary">@color/white</item>
        <item name="colorOnPrimary">@color/white</item>
    </style>

    <style name="MyActionBar.MenuTextStyle"
        parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title">
        <item name="android:textColor">@color/white</item>
<!--        <item name="android:textStyle">bold</item>-->
        <item name="android:textSize">14sp</item>
    </style>

</resources>