RecyclerView：带header和footer的grid

知道原理后，为RecyclerView实现同时带header和footer也就分分钟的事情了

你可以把GridLayoutManager(this, 3)中的第二个参数设置为1，那就变成一个带header和footer的ListView了。
注意，这里header和footer可以为null（没人规定一定要设置header或footer的，呵呵）

import java.util.ArrayList;import java.util.List;import com.example.test.R;import com.widget.view.HeaderFooterAdapter.ViewHolder;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;/** * 为了用RecyclerView创建一个带header的grid：1,定义一个具有两种view类型的adapter，一个为header一个为普通item。2,inflate一个header，把它传递给adapter。3,重写GridLayoutManager中的setSpanSizeLookup，在header所处的位置返回和span count（列数）相等的 span size。 * @author Administrator * */public class HeaderFooterAdapter extends RecyclerView.Adapter<ViewHolder> {private static final int ITEM_VIEW_TYPE_HEADER = 0;private static final int ITEM_VIEW_TYPE_ITEM = 1;private static final int ITEM_VIEW_TYPE_FOOTER = 2;private final View header;private final View footer;private final List<String> labels;private int headerCount=0;private int footerCount=0;public HeaderFooterAdapter(View header, View footer,int count) {headerCount=header == null?0:1;footerCount=footer == null?0:1;this.header = header;this.footer = footer;this.labels = new ArrayList<String>(count);for (int i = 0; i < count; ++i) {labels.add(String.valueOf(i));}}public boolean isHeader(int position) {if(headerCount==0){return false;}return position == 0;}public boolean isFooter(int position) {if(footerCount==0){return false;}return position == labels.size()+headerCount;// add 1 for footer//return position == getItemCount()-headerCount;// or Subtract 1 for footer}@Overridepublic ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {if (viewType == ITEM_VIEW_TYPE_HEADER) {return new ViewHolder(header);}if (viewType == ITEM_VIEW_TYPE_FOOTER) {return new ViewHolder(footer);}View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);return new ViewHolder(view);}@Overridepublic void onBindViewHolder(final ViewHolder holder, final int position) {if (isHeader(position)) {return;}if (isFooter(position)) {return;}final String label = labels.get(position - headerCount); // Subtract 1 for headerholder.textView.setText(label);}@Overridepublic int getItemViewType(int position) {if(isHeader(position)){return ITEM_VIEW_TYPE_HEADER;}if(isFooter(position)){return ITEM_VIEW_TYPE_FOOTER;}return ITEM_VIEW_TYPE_ITEM;}@Overridepublic int getItemCount() {return labels.size() + headerCount+footerCount;}class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{public TextView textView;public ViewHolder(View itemView) {super(itemView);if (onItemClickLitener != null){itemView.setOnClickListener(this);            }textView = (TextView) itemView.findViewById(R.id.item_0);}@Overridepublic void onClick(View v) {// TODO Auto-generated method stubonItemClickLitener.onItemClick(v, getLayoutPosition());//getPosition()被废弃了}}private static OnItemClickLitener onItemClickLitener;public void setOnItemClickLitener(OnItemClickLitener onItemClickLitener) {this.onItemClickLitener = onItemClickLitener;}public interface OnItemClickLitener {void onItemClick(View view, int position);}}

View header = LayoutInflater.from(this).inflate(R.layout.header_view, recyclerView, false);        View footer = LayoutInflater.from(this).inflate(R.layout.footer_view, recyclerView, false);final HeaderFooterAdapter adapter = new HeaderFooterAdapter(header,footer, 30);adapter.setOnItemClickLitener(new HeaderFooterAdapter.OnItemClickLitener() {@Overridepublic void onItemClick(View view, int position) {// TODO Auto-generated method stubif(adapter.isHeader(position)){Toast.makeText(context, "header clicked", Toast.LENGTH_SHORT).show();}else if(adapter.isFooter(position)){Toast.makeText(context, "footer clicked", Toast.LENGTH_SHORT).show();}else{Toast.makeText(context, "header item "+position, Toast.LENGTH_SHORT).show();}}});        final GridLayoutManager manager = new GridLayoutManager(this, 3);        manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {@Overridepublic int getSpanSize(int position) {if(adapter.isHeader(position)||adapter.isFooter(position)){return manager.getSpanCount();}return  1;}});        recyclerView.setLayoutManager(manager);recyclerView.setAdapter(adapter);

你必须了解的RecyclerView的五大开源项目-解决上拉加载、下拉刷新和添加Header、Footer等问题
http://www.see-source.com/blog/300000035/1463.html

滑动到顶部/底部 可拉伸回弹的ListView与ScrollView
https://github.com/teisun/SunmiUI