Android上下文操作栏（CAB）backgroundSplit属性不工作

我假设

backgroundSplit

属性控制

CAB

底部显示为橙色线的内容：

当我设置

CAB

的样式并更改

background

颜色时，

backgroundSplit

将消失

styles.xml

 <!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeBackground">@drawable/cab_background</item> <!-- Here -->
</style>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/colorSecondary"/>
</shape>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeStyle">@style/ActionModeStyle</item> <!-- Here -->
</style>

<style name="ActionModeStyle" parent="Widget.AppCompat.ActionMode">
    <item name="background">@drawable/cab_background</item>
</style>

<?xml version="1.0" encoding="utf-8"?>
<!-- This is a dummy drawable so that we can refer to the drawable ID -->
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@android:color/white"/>
</shape>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeSplitBackground">@color/colorAccent</item> <!-- Here -->
</style>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeStyle">@style/ActionModeStyle</item> <!-- Here -->
</style>

<style name="ActionModeStyle" parent="Widget.AppCompat.ActionMode">
    <item name="background">@drawable/cab_background</item>
    <item name="backgroundSplit">@color/colorAccent</item>
</style>

我根据

AppCompat

源代码中使用的绘图表建模：

<item name="actionModeBackground">@drawable/abc_cab_background_top_material</item>

。。。这也不是：

styles.xml

 <!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeBackground">@drawable/cab_background</item> <!-- Here -->
</style>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/colorSecondary"/>
</shape>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeStyle">@style/ActionModeStyle</item> <!-- Here -->
</style>

<style name="ActionModeStyle" parent="Widget.AppCompat.ActionMode">
    <item name="background">@drawable/cab_background</item>
</style>

<?xml version="1.0" encoding="utf-8"?>
<!-- This is a dummy drawable so that we can refer to the drawable ID -->
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@android:color/white"/>
</shape>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeSplitBackground">@color/colorAccent</item> <!-- Here -->
</style>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="windowActionModeOverlay">true</item>
    <item name="actionModeStyle">@style/ActionModeStyle</item> <!-- Here -->
</style>

<style name="ActionModeStyle" parent="Widget.AppCompat.ActionMode">
    <item name="background">@drawable/cab_background</item>
    <item name="backgroundSplit">@color/colorAccent</item>
</style>

@颜色/原色
@颜色/原色暗
@颜色/颜色重音
真的
@风格/动作风格
@可牵引/驾驶室背景
@颜色/颜色重音

无论我是否将

backgroundSplit

设置为

@drawable