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

    <!-- 填充的颜色 -->

    <solid android:color="#ea2a2d" />

    <!-- 设置按钮的四个角为弧形 -->

    <corners android:radius="15dip" />

</shape>