public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)

public void onBindViewHolder(ViewHolder holder, int position)

public int getItemViewType(int position)

package cn.wsy.recyclerdemo;

import android.content.Context;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by wsy on 2016/8/4.
 */
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyHolder> {

  private RecyclerView mRecyclerView;

  private List<String> data = new ArrayList<>();
  private Context mContext;

  private View VIEW_FOOTER;
  private View VIEW_HEADER;

  //Type
  private int TYPE_NORMAL = 1000;
  private int TYPE_HEADER = 1001;
  private int TYPE_FOOTER = 1002;

  public MyAdapter(List<String> data, Context mContext) {
    this.data = data;
    this.mContext = mContext;
  }

  @Override
  public MyAdapter.MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    if (viewType == TYPE_FOOTER) {
      return new MyHolder(VIEW_FOOTER);
    } else if (viewType == TYPE_HEADER) {
      return new MyHolder(VIEW_HEADER);
    } else {
      return new MyHolder(getLayout(R.layout.item_list_layout));
    }
  }

  @Override
  public void onBindViewHolder(MyHolder holder, int position) {
    if (!isHeaderView(position) && !isFooterView(position)) {
      if (haveHeaderView()) position--;
      TextView content = (TextView) holder.itemView.findViewById(R.id.item_content);
      TextView time = (TextView) holder.itemView.findViewById(R.id.item_time);
      content.setText(data.get(position));
      time.setText("2016-1-1");
    }
  }

  @Override
  public int getItemCount() {
    int count = (data == null ? 0 : data.size());
    if (VIEW_FOOTER != null) {
      count++;
    }

    if (VIEW_HEADER != null) {
      count++;
    }
    return count;
  }

  @Override
  public int getItemViewType(int position) {
    if (isHeaderView(position)) {
      return TYPE_HEADER;
    } else if (isFooterView(position)) {
      return TYPE_FOOTER;
    } else {
      return TYPE_NORMAL;
    }
  }

  @Override
  public void onAttachedToRecyclerView(RecyclerView recyclerView) {
    try {
      if (mRecyclerView == null && mRecyclerView != recyclerView) {
        mRecyclerView = recyclerView;
      }
      ifGridLayoutManager();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  private View getLayout(int layoutId) {
    return LayoutInflater.from(mContext).inflate(layoutId, null);
  }

  public void addHeaderView(View headerView) {
    if (haveHeaderView()) {
      throw new IllegalStateException("hearview has already exists!");
    } else {
      //避免出现宽度自适应
      ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
      headerView.setLayoutParams(params);
      VIEW_HEADER = headerView;
      ifGridLayoutManager();
      notifyItemInserted(0);
    }

  }

  public void addFooterView(View footerView) {
    if (haveFooterView()) {
      throw new IllegalStateException("footerView has already exists!");
    } else {
      ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
      footerView.setLayoutParams(params);
      VIEW_FOOTER = footerView;
      ifGridLayoutManager();
      notifyItemInserted(getItemCount() - 1);
    }
  }

  private void ifGridLayoutManager() {
    if (mRecyclerView == null) return;
    final RecyclerView.LayoutManager layoutManager = mRecyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager) {
      final GridLayoutManager.SpanSizeLookup originalSpanSizeLookup =
          ((GridLayoutManager) layoutManager).getSpanSizeLookup();
      ((GridLayoutManager) layoutManager).setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
        @Override
        public int getSpanSize(int position) {
          return (isHeaderView(position) || isFooterView(position)) ?
              ((GridLayoutManager) layoutManager).getSpanCount() :
              1;
        }
      });
    }
  }

  private boolean haveHeaderView() {
    return VIEW_HEADER != null;
  }

  public boolean haveFooterView() {
    return VIEW_FOOTER != null;
  }

  private boolean isHeaderView(int position) {
    return haveHeaderView() && position == 0;
  }

  private boolean isFooterView(int position) {
    return haveFooterView() && position == getItemCount() - 1;
  }


  public static class MyHolder extends RecyclerView.ViewHolder {

    public MyHolder(View itemView) {
      super(itemView);
    }
  }

}

  private void initRecyc() {
//    mRecyclerView.setLayoutManager(new GridLayoutManager(this,2));
    mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

    adapter = new MyAdapter(data, this);
    mRecyclerView.setAdapter(adapter);

    adapter.addFooterView(LayoutInflater.from(this).inflate(R.layout.item_footer_layout,null));
    adapter.addHeaderView(LayoutInflater.from(this).inflate(R.layout.item_header_layout,null));
  }

  private void ifGridLayoutManager() {
    if (mRecyclerView == null) return;
    final RecyclerView.LayoutManager layoutManager = mRecyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager) {
      final GridLayoutManager.SpanSizeLookup originalSpanSizeLookup =
          ((GridLayoutManager) layoutManager).getSpanSizeLookup();
      ((GridLayoutManager) layoutManager).setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
        @Override
        public int getSpanSize(int position) {
          return (isHeaderView(position) || isFooterView(position)) ?
              ((GridLayoutManager) layoutManager).getSpanCount() :
              1;
        }
      });
    }
  }