<?xml version="1.0" encoding="utf-8"?>
<!-- 圆形背景 - 分类选中状态 -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <gradient
        android:type="linear"
        android:angle="135"
        android:startColor="@color/gradient_blue"
        android:endColor="@color/gradient_pink" />
    <size android:width="40dp" android:height="40dp"/>
</shape>

