练习使用XRecyclerView，可上拉下拉刷新。

package com.lixu.testxrecyclerview;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import com.jcodecraeer.xrecyclerview.XRecyclerView;

public class MainActivity extends AppCompatActivity {
    private XRecyclerView mXRecyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        int[] imgs = {R.drawable.img1, R.drawable.img2, R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6, R.drawable.img7, R.drawable.img8, R.drawable.img9, R.drawable.img10,
                R.drawable.img11, R.drawable.img12, R.drawable.img13, R.drawable.img14, R.drawable.img15, R.drawable.img16, R.drawable.img17, R.drawable.img18, R.drawable.img19, R.drawable.img20,
                R.drawable.meinv1, R.drawable.meinv2, R.drawable.meinv3, R.drawable.meinv4, R.drawable.meinv5, R.drawable.meinv6, R.drawable.meinv7, R.drawable.meinv8, R.drawable.meinv9, R.drawable.meinv10,
                R.drawable.meinv11, R.drawable.meinv12, R.drawable.meinv13, R.drawable.meinv14, R.drawable.meinv15, R.drawable.meinv16, R.drawable.meinv17, R.drawable.meinv18, R.drawable.meinv19, R.drawable.meinv20,
        };

        mXRecyclerView = (XRecyclerView) findViewById(R.id.xrecyclerview);
        //新建瀑布流的布局
        StaggeredGridLayoutManager sgm = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
        //设置滑动方向
        sgm.setOrientation(StaggeredGridLayoutManager.HORIZONTAL);
        //设置布局
        mXRecyclerView.setLayoutManager(sgm);
        mXRecyclerView.setPullRefreshEnabled(true);
        MyAdapter myAdapter= new MyAdapter(imgs,this);
        mXRecyclerView.setAdapter(myAdapter);
        //设置点击事件
        myAdapter.setOnItemClickLitener(new MyAdapter.OnItemClickLitener() {
            @Override
            public void onitemclick(View view, int pos) {
                Toast.makeText(getApplicationContext(),"第"+pos+"被点击",Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onitemlongclick(View view, int pos) {
                Toast.makeText(getApplicationContext(),"第"+pos+"被长按",Toast.LENGTH_SHORT).show();
            }
        });
        //添加头部
        View header = LayoutInflater.from(this).inflate(R.layout.header, (ViewGroup) findViewById(android.R.id.content), false);
        mXRecyclerView.addHeaderView(header);
        //设置 上拉下拉刷新监听器
        mXRecyclerView.setLoadingListener(new XRecyclerView.LoadingListener() {

            @Override
            public void onRefresh() {
                mXRecyclerView.refreshComplete();
            }

            @Override
            public void onLoadMore() {
                mXRecyclerView.loadMoreComplete();
            }
        });

    }



}

package com.lixu.testxrecyclerview;

import android.content.Context;
import android.graphics.BitmapFactory;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.jcodecraeer.xrecyclerview.XRecyclerView;

/**
 * Created by lixu on 2016/3/19.
 */
class MyAdapter extends XRecyclerView.Adapter<MyAdapter.Myholder> {
    private int[] data;
    private Context context;
    private BitmapFactory.Options otp;


    public MyAdapter(int[] imgs, Context c) {
        context = c;
        data = imgs;
        otp = new BitmapFactory.Options();
    }

    @Override
    public Myholder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = View.inflate(context, R.layout.item_list, null);

        return new Myholder(view);
    }

    //设置回调接口
    interface OnItemClickLitener {

        void onitemclick(View view, int pos);

        void onitemlongclick(View view, int pos);

    }

    private OnItemClickLitener onItemClickLitener;


    public void setOnItemClickLitener(OnItemClickLitener onItemClickLitener) {
        this.onItemClickLitener = onItemClickLitener;
    }


    @Override
    public void onBindViewHolder(final Myholder holder, int position) {
        //将本地图片改成bitmap图片
        holder.iv.setImageBitmap(BitmapFactory.decodeStream(context.getResources().openRawResource(data[position]), null, otp));
        // holder.iv.setImageResource(data[position]);
        //设置点击事件
        holder.iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int pos = holder.getLayoutPosition();
                onItemClickLitener.onitemclick(holder.iv, pos);
            }
        });
        //设置长按点击事件
        holder.iv.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                int pos = holder.getLayoutPosition();
                onItemClickLitener.onitemlongclick(holder.iv, pos);
                return false;
            }
        });

    }


    @Override
    public int getItemCount() {

        return data.length;
    }

    public class Myholder extends RecyclerView.ViewHolder {
        private ImageView iv;

        public Myholder(View itemView) {
            super(itemView);
            iv = (ImageView) itemView.findViewById(R.id.iv);
        }
    }
}

xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.lixu.testxrecyclerview.MainActivity">

   <com.jcodecraeer.xrecyclerview.XRecyclerView
       android:id="@+id/xrecyclerview"
       android:layout_width="match_parent"
       android:layout_height="match_parent"></com.jcodecraeer.xrecyclerview.XRecyclerView>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/header"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/meinv5"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:cardview="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:padding="5dp">

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        cardview:cardElevation="3dp">

        <ImageView
            android:id="@+id/iv"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="2dp"
            android:src="@mipmap/ic_launcher" />

    </android.support.v7.widget.CardView>

</LinearLayout>