Android RecyclerView添加FootView和HeadView

 //两个final int类型表示ViewType的两种类型
 private final int NORMAL_TYPE = 0;
 private final int FOOT_TYPE = 1111;

 @Override
 public int getItemViewType(int position) {
 if (position == max_count - 1) {
 return FOOT_TYPE;
 }
 return NORMAL_TYPE;
 }

//初始化viewHolder，此处绑定后在onBindViewHolder中可以直接使用
 public ViewHolder(View itemView, int viewType) {
 super(itemView);
 if (viewType == NORMAL_TYPE) {
 tvViewHolder = (TextView) itemView.findViewById(R.id.tv_view_holder);
 llViewHolder = (LinearLayout) itemView;
 } else if (viewType == FOOT_TYPE) {
 tvFootView = (TextView) itemView;
 }
 }

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
 private List<String> mData;//数据
 private int max_count = 10;//最大显示数
 private Boolean isFootView = false;//是否添加了FootView
 private String footViewText = "";//FootView的内容

 //两个final int类型表示ViewType的两种类型
 private final int NORMAL_TYPE = 0;
 private final int FOOT_TYPE = 1111;


 public RecyclerAdapter(List<String> data) {
 mData = data;
 }

 public class ViewHolder extends RecyclerView.ViewHolder {
 public TextView tvViewHolder;
 public LinearLayout llViewHolder;

 public TextView tvFootView;//footView的TextView属于独自的一个layout

 //初始化viewHolder，此处绑定后在onBindViewHolder中可以直接使用
 public ViewHolder(View itemView, int viewType) {
 super(itemView);
 if (viewType == NORMAL_TYPE) {
 tvViewHolder = (TextView) itemView.findViewById(R.id.tv_view_holder);
 llViewHolder = (LinearLayout) itemView;
 } else if (viewType == FOOT_TYPE) {
 tvFootView = (TextView) itemView;
 }
 }
 }

 @Override
 public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
 View normal_views = LayoutInflater.from(parent.getContext()).inflate(
 R.layout.rc_item, parent, false);
 View foot_view = LayoutInflater.from(parent.getContext()).inflate(
 R.layout.foot_view, parent, false);

 if (viewType == FOOT_TYPE)
 return new ViewHolder(foot_view, FOOT_TYPE);
 return new ViewHolder(normal_views, NORMAL_TYPE);
 }

 @Override
 public int getItemViewType(int position) {
 if (position == max_count - 1) {
 return FOOT_TYPE;
 }
 return NORMAL_TYPE;
 }

 @Override
 public void onBindViewHolder(ViewHolder holder, int position) {
 //建立起ViewHolder中试图与数据的关联
 Log.d("xjj", getItemViewType(position) + "");
 //如果footview存在，并且当前位置ViewType是FOOT_TYPE
 if (isFootView && (getItemViewType(position) == FOOT_TYPE)) {
 holder.tvFootView.setText(footViewText);
 } else {
 holder.tvViewHolder.setText(mData.get(position) + position);
 }
 }

 @Override
 public int getItemCount() {
 if (mData.size() < max_count) {
 return mData.size();
 }
 return max_count;
 }

 //创建一个方法来设置footView中的文字
 public void setFootViewText(String footViewText) {
 isFootView = true;
 this.footViewText = footViewText;
 }
}