使用shape 自定义ui之渐变半圆阴影

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">    <item>        <shape android:shape="oval"            >            <padding android:bottom="3dp" />            <solid android:color="#000000" />            <gradient                android:angle="90"                android:endColor="#ffffff"                android:startColor="#E8E8E8" />            <size                android:width="200dp"                android:height="200dp" />        </shape>    </item>    <item>        <shape android:shape="oval">            <solid android:color="#ffffff" />            <size                android:width="200dp"                android:height="200dp" />        </shape>    </item></layer-list>