添加分割线

recyclerview.addItemDecoration(new DividerListItemDecoration(MainActivity.this,LinearLayoutManager.VERTICAL));

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"       android:shape="rectangle"    >    <solid android:color="#000"></solid>    <size android:height="1dp"></size></shape>