将分隔线添加到 RecyclerView 项目

只需将这些行添加到初始化

RecyclerView mRecyclerView = (RecyclerView) view.findViewById(recyclerView);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.addItemDecoration(new DividerItemDecoration(getActivity(), DividerItemDecoration.VERTICAL));

添加 adapter 并像往常一样调用 .notifyDataSetChanged();！
这不是 Recyclerview 的内置函数，而是添加到支持库中。所以不要忘记在你的应用程序级 build.gradle 文件中包含它

compile "com.android.support:appcompat-v7:25.3.1"
compile "com.android.support:recyclerview-v7:25.3.1"

可以将多个 ItemDecorations 添加到单个 RecyclerView 中。

改变分频器颜色 ：

为 itemDecoration 设置颜色非常简单。

1. 步骤是：创建一个位于 drawable 文件夹的 divider.xml 文件

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
       android:shape="line">
    <size
        android:width="1px"
        android:height="1px"/>
    <solid android:color="@color/divider_color"/>
</shape>

2. 步骤是：设置 drawable

    // Get drawable object
    Drawable mDivider = ContextCompat.getDrawable(m_jContext, R.drawable.divider);
    // Create a DividerItemDecoration whose orientation is Horizontal
    DividerItemDecoration hItemDecoration = new DividerItemDecoration(m_jContext,
            DividerItemDecoration.HORIZONTAL);
    // Set the drawable on it
    hItemDecoration.setDrawable(mDivider);

    // Create a DividerItemDecoration whose orientation is vertical
    DividerItemDecoration vItemDecoration = new DividerItemDecoration(m_jContext,
            DividerItemDecoration.VERTICAL);
    // Set the drawable on it
    vItemDecoration.setDrawable(mDivider);