<?xml version="1.0" encoding="utf-8"?>
<!-- 设置圆角边框 -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:padding="20dp"
    android:shape="rectangle" >

    <solid android:color="#00ff00" />

    <corners
        android:bottomLeftRadius="50dp"
        android:bottomRightRadius="50dp"
        android:topLeftRadius="50dp"
        android:topRightRadius="50dp" />

</shape>