<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval"
android:useLevel="false">
//圆的颜色
<solid android:color="@color/red"/>
//圆的外边大小
<stroke
android:width="1dp"
android:color="@color/white"/>
//圆
<size android:width="20dp"
android:height="20dp"/>
</shape>