很简单为RecyclerView添加头部：使用一个类Recycl

首先看下自己的RecyclerView是否包裹在 LinearLayout, FrameLayout, RelativeLayout.这三种布局中，否则会报错：

Currently, NOT already aligned RecyclerViewHeader can only be used for RecyclerView with a parent of one of types: LinearLayout, FrameLayout, RelativeLayout.

意思就是说RecyclerViewHeader这个东西只使用在线性布局、帧布局、相对布局包裹下的RecyclerView

例如：

activity_main布局

<LinearLayout 

    xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="match_parent" />

LinearLayout>

检查好上面的步骤之后，开始RecyclerViewHeader

1、首先在model层的build的dependencies中加入依赖：compile 'com.bartoszlipinski.recyclerviewheader:library:1.2.0'

[js] view plain copy

[js] view plain copy

dependencies {  

 compile'com.bartoszlipinski.recyclerviewheader:library:1.2.0'  

}  

为你的header创建一个XML布局文件：（就是你要加的头部的布局，我这里只加了一个TextView），这是一个单独的xml文件

1、创建一个布局文件

xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="100dp">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:text="header" />FrameLayout>

2、MainActivity代码

public class MainActivityextends AppCompatActivityimplements MyRecyclerViewAdapter.onItemClickListener {

//声明RecyclerViewprivate RecyclerViewmRecyclerview;//数据源    private Listlist;

//声明Adapter    MyRecyclerViewAdaptermyRecyclerViewAdapter;

//声明RecyclerViewHeader对象RecyclerViewHeaderheader;@Override    protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);

//初始化RecyclerViewHeaderheader = RecyclerViewHeader.fromXml(this, R.layout.header);

mRecyclerview = (RecyclerView) findViewById(R.id.recyclerview);list =new ArrayList<>();for (int i =0; i <100; i++) {list.add("这是第" + i +"条");        }myRecyclerViewAdapter =new MyRecyclerViewAdapter(list);

//使用RecyclerView一定要setLayoutManagermRecyclerview.setLayoutManager(new LinearLayoutManager(this));

//        mRecyclerview.setLayoutManager(new GridLayoutManager(this,2));//        mRecyclerview.setLayoutManager(new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.HORIZONTAL));

//把RecyclerViewHeader赋予RecyclerView,这个一定要写在setLayoutManager之后

header.attachTo(mRecyclerview);mRecyclerview.setAdapter(myRecyclerViewAdapter);myRecyclerViewAdapter.setOnItemClickListener(this);            }@Override    public void onItemClick(View view,int position) {        Log.d("TAG","类名==MainActivity" +"方法名==onItemClick===:" +"当前点击的是第" + position);    }}

目前该库RecyclerViewHeader适用于LinearLayoutManager,GridLayoutManager和StaggeredGridLayoutManager布局的RecyclerView。

https://blog.csdn.net/sunbinkang/article/details/53024199