Android Recyclerview适配器 加载头部 以及自定义View

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.ImageView;import android.widget.TextView;import com.bumptech.glide.Glide;import java.util.List;import bean.TuijianBean;import commerce.bick.com.jdcommerce.R;/** * Created by wsy on 2016/8/4. */public class RecycleAdapter extends RecyclerView.Adapter<RecycleAdapter.MyHolder> {    private RecyclerView mRecyclerView;    private List<TuijianBean> data;    private Context mContext;    private View VIEW_FOOTER;    private View VIEW_HEADER;    private View VIEW_VIEWPAGE;    private View VIEW_MIAOPAGE;    //Type    private int TYPE_NORMAL = 1000;//默认    private int TYPE_HEADER = 1001;//头部    private int TYPE_FOOTER = 1002;//脚部    private int TYPE_VIEWPAGE=1003;//Viewpage    private int TYPE_MIAOPAGE=1004;//秒杀部位    public RecycleAdapter(List<TuijianBean> data, Context mContext) {        this.data = data;        this.mContext = mContext;    }    @Override    public RecycleAdapter.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 if(viewType==TYPE_VIEWPAGE){            return new MyHolder(VIEW_VIEWPAGE);        }else if(viewType==TYPE_MIAOPAGE){            return new MyHolder(VIEW_MIAOPAGE);        }        else {            return new MyHolder(getLayout(R.layout.item_list_layout));        }    }    @Override    public void onBindViewHolder(final MyHolder holder, int position) {        if (!isHeaderView(position) && !isFooterView(position) && !isViewPageView(position) &&!isMiaoPageView(position)) {            if (haveHeaderView()) position--;            if (havePageView()) position--;            if (haveMiaoView()) position--;            ImageView iv = holder.itemView.findViewById(R.id.zhu_iv_gv);            TextView tv = holder.itemView.findViewById(R.id.zhu_tv);            TextView zhu_tv_price=holder.itemView.findViewById(R.id.zhu_tv_price);            zhu_tv_price.setText("￥"+data.get(position).price);           // Toast.makeText(mContext,"商品pid"+data.get(position).pid+data.get(position).title,Toast.LENGTH_SHORT).show();            Glide.with(mContext).load(data.get(position).images).into(iv);            tv.setText(data.get(position).title);            final int pos = holder.getLayoutPosition()-3;            /**             * 主页填充数据             */            if(mOnItemClickListener!=null){                  //item的点击事件                final int finalPosition = position;                holder.itemView.setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View view) {                        mOnItemClickListener.onClick(finalPosition,data.get(pos).pid);                    }                });                holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {                    @Override                    public boolean onLongClick(View view) {                        mOnItemClickListener.onLongClick(finalPosition,data.get(pos).pid);                        return false;                    }                });            }        }    }    private OnItemClickListener mOnItemClickListener;    public interface OnItemClickListener{        //点击事件        void onClick( int position,String pid);        //长按事件        void onLongClick( int position,String pid);    }    public void setOnItemClickListener(OnItemClickListener onItemClickListener ){        this. mOnItemClickListener=onItemClickListener;    }    @Override    public int getItemCount() {        int count = (data == null ? 0 : data.size());        if (VIEW_FOOTER != null) {            count++;        }        if (VIEW_HEADER != null) {            count++;        }        if(VIEW_MIAOPAGE !=null){            count++;        }        if(VIEW_VIEWPAGE !=null){            count++;        }        return count;    }    @Override    public int getItemViewType(int position) {        if (isHeaderView(position)) {            return TYPE_HEADER;        } else if (isFooterView(position)) {            return TYPE_FOOTER;        }else if(isViewPageView(position)){            return TYPE_VIEWPAGE;        }else if(isMiaoPageView(position)){            return TYPE_MIAOPAGE;        }        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);        }    }    public void addPageView(View pageView) {        if (havePageView()) {            throw new IllegalStateException("pageView has already exists!");        } else {            ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);            pageView.setLayoutParams(params);            VIEW_VIEWPAGE = pageView;            ifGridLayoutManager();            notifyItemInserted(1);        }    }    public void addMiaoView(View miaoView) {        if (haveMiaoView()) {            throw new IllegalStateException("miaoView has already exists!");        } else {            ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);            miaoView.setLayoutParams(params);            VIEW_MIAOPAGE = miaoView;            ifGridLayoutManager();            notifyItemInserted(2);        }    }    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) ||isViewPageView(position)) || isMiaoPageView(position) ?                            ((GridLayoutManager) layoutManager).getSpanCount() :                            1;                }            });        }    }    private boolean haveHeaderView() {        return VIEW_HEADER != null;    }    public boolean haveFooterView() {        return VIEW_FOOTER != null;    }    private boolean havePageView() {        return VIEW_VIEWPAGE != null;    }    private boolean haveMiaoView() {        return VIEW_MIAOPAGE != null;    }    private boolean isHeaderView(int position) {        return haveHeaderView() && position == 0;    }    private boolean isFooterView(int position) {        return haveFooterView() && position == getItemCount() - 1;    }    private boolean isViewPageView(int position) {        return havePageView() && position == 1;    }    private boolean isMiaoPageView(int position) {        return haveMiaoView() && position == 2;    }    public static class MyHolder extends RecyclerView.ViewHolder {        public MyHolder(View itemView) {            super(itemView);        }    }}