Nougat 7.0  |  7.0.0_r31
Xml文件  |  7行  |  210 B 

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="line">
    <stroke android:color="#CCC" />
    <size android:height="1dp" />
</shape>