<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <!-- 角度 -->
    <corners
        android:topLeftRadius="8dp"
        android:topRightRadius="8dp" />
    <!-- 渐变 <gradient android:centerColor="#fff" android:endColor="#0f0" android:startColor="#f00" /> -->
    <!-- 纯色 -->
    <solid android:color="#ffffffff" />
    <!-- 边框 <stroke android:width="1dp" android:color="#000" android:dashWidth="5dp" android:dashGap="3dp" /> -->
</shape>