Android 中RecyclerView通用适配器的实现

RViewHolder

importandroid.content.Context;

importandroid.graphics.Bitmap;

importandroid.support.v7.widget.RecyclerView.ViewHolder;

importandroid.util.SparseArray;

importandroid.view.LayoutInflater;

importandroid.view.View;

importandroid.view.ViewGroup;

importandroid.widget.ImageView;

importandroid.widget.TextView;

publicclassRViewHolderextendsViewHolder {

 privateContext mContext;

 privateView mConvertView;

 privateSparseArraymViews;

 publicRViewHolder(View itemView) {

  super(itemView);

  mConvertView = itemView;

  this.mViews =newSparseArray();

 }

 publicstaticRViewHolder get(Context context, ViewGroup parent,intlayoutId,intposition) {

  View view = LayoutInflater.from(context).inflate(layoutId, parent,false);

  returnnewRViewHolder(view);

 }

 /**

  * 通过控件的Id获取对于的控件，如果没有则加入views

  *

  * @param viewId

  * @return

  */

 publicT getView(intviewId) {

  View view = mViews.get(viewId);

  if(view ==null) {

   view = mConvertView.findViewById(viewId);

   mViews.put(viewId, view);

  }

  return(T) view;

 }

 /**

  * 为TextView设置字符�?

  *

  * @param viewId

  * @param text

  * @return

  */

 publicViewHolder setText(intviewId, String text) {

  TextView view = getView(viewId);

  view.setText(text);

  returnthis;

 }

 /**

  * 为ImageView设置图片

  *

  * @param viewId

  * @param drawableId

  * @return

  */

 publicViewHolder setImageResource(intviewId,intdrawableId) {

  ImageView view = getView(viewId);

  view.setImageResource(drawableId);

  returnthis;

 }

 /**

  * 为ImageView设置图片

  *

  * @param viewId

  * @param drawableId

  * @return

  */

 publicViewHolder setImageBitmap(intviewId, Bitmap bm) {

  ImageView view = getView(viewId);

  view.setImageBitmap(bm);

  returnthis;

 }

 publicView getConvertView() {

  returnmConvertView;

 }

}

这里是RBaseAdapter

importjava.util.ArrayList;

importjava.util.Collection;

importjava.util.List;

importandroid.content.Context;

importandroid.support.v7.widget.RecyclerView.Adapter;

importandroid.view.LayoutInflater;

importandroid.view.View;

importandroid.view.ViewGroup;

importandroid.widget.LinearLayout;

publicabstractclassRBaseAdapterextendsAdapter{

 privateContext mContext;

 privateListlist;

 protectedLayoutInflater mInflater;

 privateintmItemLayoutId;

 publicRBaseAdapter(Context context) {

  // TODO Auto-generated constructor stub

  this.mContext = context;

  this.mInflater = LayoutInflater.from(mContext);

  this.mItemLayoutId =newLinearLayout(mContext).getId();

  this.list =newArrayList();

 }

 publicRBaseAdapter(Context context, Listlist) {

  // TODO Auto-generated constructor stub

  this.mContext = context;

  this.mInflater = LayoutInflater.from(mContext);

  this.mItemLayoutId =newLinearLayout(mContext).getId();

  this.list = list;

 }

 publicRBaseAdapter(Context context, Listlist,intitemLayoutId) {

  this.mContext = context;

  this.mInflater = LayoutInflater.from(mContext);

  this.mItemLayoutId = itemLayoutId;

  this.list = list;

 }

 publicRBaseAdapter(Context context,intitemLayoutId) {

  this.mContext = context;

  this.mInflater = LayoutInflater.from(mContext);

  this.mItemLayoutId = itemLayoutId;

  this.list =newArrayList();

 }

 publicvoidsetitemLayoutId(intitemLayoutId) {

  this.mItemLayoutId = itemLayoutId;

 }

 publicListgetList() {

  returnthis.list;

 }

 publicvoidappendList(Listlist) {

  // TODO Auto-generated method stub

  this.list = list;

  notifyDataSetChanged();

 }

 publicvoidaddList(Listlist2) {

  // TODO Auto-generated method stub

  this.list.addAll((Collection) list2);

  notifyDataSetChanged();

 }

 @Override

 publicintgetItemCount() {

  returnlist.size();

 }

 booleanhasHeader =false;

 booleanhasFooter =false;

 View headerView;

 View footerView;

 publicvoidsetHeaderView(View headerView) {

  hasHeader=true;

  this.headerView = headerView;

 }

 publicvoidsetFooterView(View footerView) {

   hasFooter =true;

  this.footerView = footerView;

 }

 publicView getHeaderView() {

  returnheaderView;

 }

 publicView getFooterView() {

  returnfooterView;

 }

 @Override

 publicvoidonBindViewHolder(RViewHolder holder,intposition) {

  if(hasHeader && position ==0) {

   return;

  }elseif(hasFooter && position == (list.size() + (hasHeader ?1:0))) {

   return;

  }else

   convert(holder, (T) list.get(position));

 }

 @Override

 publicRViewHolder onCreateViewHolder(ViewGroup parent,intposition) {

  if(hasHeader && position ==0) {

   returnnewRViewHolder(headerView);

  }elseif(hasFooter && position == (list.size() + (hasHeader ?1:0))) {

   returnnewRViewHolder(footerView);

  }else

   returnRViewHolder.get(mContext, parent, mItemLayoutId, position);

 }

//这里定义抽象方法，我们在匿名内部类实现的时候实现此方法来调用控件

 publicabstractvoidconvert(RViewHolder holder, T item);

}

      对于RBaseAdapter稍微讲解下，首先是泛型，这样任何对象类型都可以使用，再来就是前面提到的headerview和footerview的解决，可以看到RBaseAdapter里面定义了几个方法，通过position的不同来加载不同的布局的思想来添加headerview和footerview。

    Activity里面调用

recyclerView.setAdapter(newRBaseAdapter(mContext, R.layout.virtual_win_users_list_item) {

   @Override

   publicvoidconvert(RViewHolder holder, VirtualWinsBean item) {

    if(Util.checkNULL(item.getNick_name())) {

     holder.setText(R.id.name, Util.HidePhone(item.getPhone() +""));

    }else{

     holder.setText(R.id.name, item.getNick_name());

    }

    RoundImageView networkImageView = holder.getView(R.id.photo);

    networkImageView.setLoadingImage(R.drawable.header_def);

    networkImageView.setDefultImage(R.drawable.header_def);

    networkImageView.LoadUrl(U.g(item.getFile_url()));

   }

  });