如果背景不透明，ListViewItem 不会突出显示

我有一个带有自定义渐变背景的 ListViewItem。默认选择器不再突出显示这些行。

仅当我将背景设置为透明时，突出显示才有效。如果没有这种改变，我怎样才能获得亮点？

这是我的列表视图：

<ListView android:id="@+id/symbolsListView"
    android:layout_width="fill_parent"
    android:background="@drawable/transparent_background"
    android:layout_height="390dp"
    android:divider="@drawable/ui_divider_line"
    android:cacheColorHint="#00000000"
    android:listSelector="@drawable/blue"
    android:drawSelectorOnTop="true"
    >

你的一些状态是聚焦的和 window_focused 的。下面我提到了选择器的代码，试试这个。

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_window_focused="false" android:drawable="@color/transparent" />

    <!--
        Even though these two point to the same resource, have two states so
        the drawable will invalidate itself when coming out of pressed state.
    -->
    <item android:state_focused="true" android:state_enabled="false"
        android:state_pressed="true" android:drawable="@color/transparent" />
    <item android:state_focused="true" android:state_enabled="false"
        android:drawable="@color/transparent" />

    <item android:state_focused="true" android:state_pressed="true"
        android:drawable="@color/solid_red" />
    <item android:state_focused="false" android:state_pressed="true"
        android:drawable="@color/solid_red" />

    <item android:state_focused="true" android:drawable="@color/solid_red" />

</selector>

希望它有效。