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 } @Override public 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); } @Override public 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 header holder.textView.setText(label); } @Override public 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; } @Override public 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); } @Override public void onClick(View v) { // TODO Auto-generated method stub onItemClickLitener.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() { @Override public void onItemClick(View view, int position) { // TODO Auto-generated method stub if(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() { @Override public 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