短视频APP怎么开发，选中下划线颜色

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 
    <item android:state_checked="true">
        <layer-list>
            <!--上面覆盖一层距离底层,填充白色。两层叠加一起就形成了一条下划线效果，原理自行脑补-->
            <item >
                <shape>
                    <solid android:color="@color/white" />
                </shape>
            </item>
            <!--底层使用下划线的颜色填充  可以自行 修改  数据-->
            <item
                android:top="40dp"
                android:gravity="center_horizontal"
                android:width="60dp" android:height="3dp">
                <shape android:shape="rectangle">
                    <solid android:color="#ff14cba1" />
                </shape>
            </item>
 
 
        </layer-list>
    </item>
 
</selector>