selector for ListView with custom highlight effect. Put in drawable-v21

list_selector.xml

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

    <!-- Selected -->
    <item android:state_focused="true" android:state_pressed="false">
        <shape>
            <solid android:color="#00ffffff" />
        </shape>
    </item>

    <!-- Pressed -->
    <item android:state_pressed="true">
        <ripple android:color="#55000000" tools:targetApi="lollipop"> <!-- ripple effect color -->
            <item android:id="@android:id/background">
                <shape android:shape="rectangle">
                    <corners android:radius="6dp" />
                    <solid android:color="#33ffffff" /> <!-- background color -->
                </shape>
            </item>
        </ripple>
    </item>

</selector>

------------- layout.xml ---------------
<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:drawSelectorOnTop="true"
    android:listSelector="@drawable/list_selector" />