初次使用RecyclerView的时候踩了很多坑，比如数据造好了adapter写好了set之后不是没数据就是显示不全要么就是崩溃各种难受，后来总算数据显示了，就要考虑刷新以及加载更多的问题了。起初我也是想的像当年实现ListView的刷新和加载更多一样添加headerView和footview，后来到网上看了一下原来已经有别的方式了，不用那么麻烦。
一、下拉刷新
1、至于下拉刷新只需要在RecyclerView外嵌套SwipeRefreshLayout即可实现下拉刷新效果
android:id="@+id/swip_live_pub" android:layout_width="match_parent" android:layout_height="match_parent"> android:id="@+id/recy_live_pub" android:layout_width="match_parent" android:layout_height="match_parent"/> 2、SwipeRefreshLayout可以设置setOnRefreshListener在刷新键听里面就可以做自己要刷新的请求了 switchRefreshLayout.setOnRefreshListener(newSwipeRefreshLayout.OnRefreshListener() { @Override public voidonRefresh() { //TODO做自己刷新相关的业务 //switchRefreshLayout.setRefreshing(false);//用于结束页面刷新进度效果 } }); 二、上拉加载更多 1、其实RecyclerView的RecyclerView.Adapter也可以实现同一列表页面多种布局效果，那么这样就好办了，我们只需要给列表结尾添加一个item显示加载更多的样式即可,照着这个思路往下走，页面时可以实现了。但是出现的时机怎么监听，怎么知道最后一条出现了去执行加载更多的异步请求。我们可以用recyclerView.addOnScrollListener(...)监听recyclerView的滑动事件,在滑动的过程中我们可以通过mLinearLayoutManager.findLastVisibleItemPosition();获取到当前显示的最后一项item的position，当这个position恰好是最后一项时执行加载更多，就这样变便实现了上啦加载的需求业务。 2、实现上拉加载代码 LinearLayoutManagermLinearLayoutManager; inttotalItemCount; intlastVisibleItem; intfirstVisibleItem; recyclerView.addOnScrollListener(newRecyclerView.OnScrollListener() { @Override public voidonScrollStateChanged(RecyclerView recyclerView,intnewState) { super.onScrollStateChanged(recyclerView, newState); } @Override public voidonScrolled(RecyclerView recyclerView,intdx,intdy) { super.onScrolled(recyclerView, dx, dy); lastVisibleItem=mLinearLayoutManager.findLastVisibleItemPosition(); firstVisibleItem=mLinearLayoutManager.findFirstVisibleItemPosition(); totalItemCount=mLinearLayoutManager.getItemCount(); if(lastVisibleItem==totalItemCount-1&&firstVisibleItem!=0){ //TODO在此处执行自己加载更多数据的异步 } } }); 三、针对这个下拉刷新和上啦加载我自己封装了一个BaseRecyclerAdapter，只要继承它便可实现，我把代码以及使用方式贴上欢迎使用和指正 1、这个是BaseRecyclerAdapter public abstract classBaseRecyclerAdapterextendsRecyclerView.AdapterimplementsView.OnClickListener, View.OnLongClickListener { protectedContextmContext; protectedListdatas;//数据 protectedLayoutInflatermInflate; protected final intTYPE_ITEM=0; protected final intTYPE_FOOTER=1; private final intPAGE_SIZE=20; protected finalStringTAG=this.getClass().getName(); privateOnRecyclerViewItemClickListenermOnItemClickListener=null; private booleanisFootView=false;//根据加载数据的情况，判断是否需要继续显示加载 private booleanisLoading=false; private booleanloadOver=false; private booleanisNeedFootView=false;//是否需要拉加载更多，true需要，false不需要 //自定义监听事件 public static interfaceOnRecyclerViewItemClickListener { voidonItemClick(View view); voidonItemLongClick(View view); } public voidsetOnItemClickListener(OnRecyclerViewItemClickListener listener) { mOnItemClickListener= listener; } //适配器初始化 publicBaseRecyclerAdapter(Context context, List datas) { mContext=context; this.datas=datas; setHasStableIds(true); } @Override public intgetItemViewType(intposition) { //判断item类别 if(position !=datas.size()) { returnTYPE_ITEM; }else{ returnTYPE_FOOTER; } } publicList getList(){ returndatas; } public voidsetList(List datas){ this.datas= datas; } @Override publicRecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,intviewType) { mInflate= LayoutInflater.from(mContext); if(viewType !=TYPE_FOOTER){ returnonCreateItemViewHolder(parent, viewType); }else{ View view =mInflate.inflate(R.layout.footer_load_view, parent,false); return newFooterLoadHolder(view); } } public abstractRecyclerView.ViewHolder onCreateItemViewHolder(ViewGroup parent,intviewType); @Override public voidonBindViewHolder(RecyclerView.ViewHolder holder,intposition) { } @Override public intgetItemCount() { if(isNeedFootView){ if(isFootView)returndatas.size() +1;//获取数据的个数 else returndatas.size(); }else returndatas.size(); } @Override public longgetItemId(intposition) { returnposition; } //点击事件回调 @Override public voidonClick(View v) { if(mOnItemClickListener!=null) { mOnItemClickListener.onItemClick(v); } } @Override public booleanonLongClick(View v) { if(mOnItemClickListener!=null) { mOnItemClickListener.onItemLongClick(v); } return false; } //自定义ViewHolder，用于显示footer classFooterLoadHolderextendsRecyclerView.ViewHolder { publicFooterLoadHolder(View itemView) { super(itemView); } } LinearLayoutManagermLinearLayoutManager; inttotalItemCount; intlastVisibleItem; intfirstVisibleItem; public final voidregisterRefreshAndLoadMoreListener(RecyclerView recyclerView,finalSwipeRefreshLayout switchRefreshLayout,finalPullListener pullListener){ mLinearLayoutManager=(LinearLayoutManager) recyclerView.getLayoutManager(); switchRefreshLayout.setOnRefreshListener(newSwipeRefreshLayout.OnRefreshListener() { @Override public voidonRefresh() { pullListener.pullToRefresh(newRefreshAndLoadNotify() { @Override public voidrefreshNotify(List refreshList) { if(refreshList ==null|| refreshList.size() ==0){ ToastUtil.showToast("已是最新一条"); switchRefreshLayout.setRefreshing(false); return; } datas.removeAll(refreshList); datas.addAll(0,refreshList); lastVisibleItem=mLinearLayoutManager.findLastVisibleItemPosition(); notifyDataSetChanged(); switchRefreshLayout.setRefreshing(false); } @Override public voidloadMoreNotify(List list) { } }); } }); recyclerView.addOnScrollListener(newRecyclerView.OnScrollListener() { @Override public voidonScrollStateChanged(RecyclerView recyclerView,intnewState) { super.onScrollStateChanged(recyclerView, newState); } @Override public voidonScrolled(RecyclerView recyclerView,intdx,intdy) { super.onScrolled(recyclerView, dx, dy); lastVisibleItem=mLinearLayoutManager.findLastVisibleItemPosition(); firstVisibleItem=mLinearLayoutManager.findFirstVisibleItemPosition(); totalItemCount=mLinearLayoutManager.getItemCount(); if(lastVisibleItem isFootView=true; notifyDataSetChanged(); return; } LogUtil.log(TAG, Log.ERROR, (isFootView&&lastVisibleItem==totalItemCount-1&&firstVisibleItem!=0)+"=========isLoading====="+isLoading); if(isFootView&&lastVisibleItem==totalItemCount-1&&firstVisibleItem!=0){ if(isLoading)return; isLoading=true; pullListener.pullToLoadMore(newRefreshAndLoadNotify() { @Override public voidrefreshNotify(List list) { } @Override public voidloadMoreNotify(List moreLoadList) { if(moreLoadList ==null|| moreLoadList.size() isFootView=false; loadOver=true; ToastUtil.showToast("已加载至最后一条"); } if(moreLoadList !=null&& moreLoadList.size() >0){ datas.removeAll(moreLoadList); datas.addAll(datas.size(), moreLoadList); } notifyDataSetChanged(); isLoading=false; } }); } } }); } } 2、这个是footview android:layout_width="match_parent" android:layout_height="60dip" android:background="@color/white" android:orientation="horizontal"> android:layout_width="match_parent" android:layout_height="30dip" android:layout_gravity="center" android:gravity="center" android:layout_marginTop="5dip" android:layout_marginBottom="5dip" android:background="@color/white" android:orientation="horizontal"> android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@color/white"/> android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="5dip" android:text="加载中..."/> 3、数据通讯监听接口 /** * Created by wangjingyun on 2017/6/7. * * 用于拉动后出发数据请求通信 */ public interfacePullListener { voidpullToRefresh(RefreshAndLoadNotify refreshAndLoad); voidpullToLoadMore(RefreshAndLoadNotify refreshAndLoad); } 4、使用：首先继承BaseRecyclerAdapter 其次在自己的activity里实现 private booleanrefreshing=false,loading=false; yourAdapter.registerRefreshAndLoadMoreListener(recy_live_pub,swip_live_pub,newPullListener() { @Override public void pullToRefresh(RefreshAndLoadNotify refreshAndLoad) { refreshing=true; getLivePubList(refreshAndLoad);//异步请求数据，拿到数据后刷新页面 } @Override public void pullToLoadMore(RefreshAndLoadNotify refreshAndLoad) { //TODO用法同刷新不在赘述 } }); public void getLivePubList(RefreshAndLoadNotify refreshAndLoad){ //TODO异步请求拿数据 refreshAndLoad.refreshNotify(list);//异步请求拿到结果后在主线程执行 }