<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke
        android:width="1dp"
        android:color="#000000" /> <!-- 这里可调整边框宽度和颜色 -->
    <solid android:color="@android:color/transparent" />
</shape>
