<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 外部 -->
    <item>
        <shape>
            <solid android:color="#FF0000" />
            <corners android:topLeftRadius="3dp" android:topRightRadius="3dp"
                android:bottomRightRadius="3dp" android:bottomLeftRadius="3dp" />
        </shape>
    </item>
    
</layer-list>