Android推荐几款好用的开源作品(二)之万能RecyclerView适配器

Android推荐几款好用的开源作品（二）之万能RecyclerView适配器前言：RecyclerView出现已经有一段时间了，我们肯定不陌生了，可以通过导入support-v7对其进行使用。根据官方的文档，该控件用于在有限的窗口中展示大量数据集，其实有了它就可以替代ListView、GridView了。了解RecyclerView架构，可以高度的解耦，异常的灵活，通过设置它提供的不同LayoutManager，ItemDecoration,ItemAnimator可以实现的想要的效果。1、首先介绍几种LayoutManager[java]viewplaincopy在CODE上查看代码片派生到我的代码片LinearLayoutManagermManager=newLinearLayoutManager(mContent);LinearLayoutManagermManager=newLinearLayoutManager(mContent,LinearLayoutManager.VERTICAL,false);//垂直布局，true表示左右翻转，false不翻转GridLayoutManagermManager=newGridLayoutManager(mContent,3);GridLayoutManagermManager=newGridLayoutManager(mContent,3,LinearLayoutManager.HORIZONTAL,false);//每行3列，水平，true表示左右翻转，false不翻转mRecyclerView.setLayoutManager(mManager);2、RecycleView简单使用[java]viewplaincopy在CODE上查看代码片派生到我的代码片//初始化控件mRecyclerView=findView(R.id.id_recyclerview);//设置布局管理器mManager=newLinearLayoutManager(mContent);mRecyclerView.setLayoutManager(mManager);//设置adaptermRecyclerView.setAdapter(mAdapter)//设置Item增加、移除动画mRecyclerView.setItemAnimator(newDefaultItemAnimator());//添加分割线mRecyclerView.addItemDecoration(newDividerItemDecoration(getActivity(),DividerItemDecoration.HORIZONTAL_LIST));3、接下来介绍的就是RecyclerView的适配器了，同样，RecyclerView和ListView，GridView一样需要adapter来填充数据,同样，自定义一个adapter需要继承RecyclerView.Adapter，代码需要实现几个父类方法onCreateViewHolder，onBindViewHolder，getItemCount(),根据名字就能知道:（1）onCreateViewHolder：主要返回的是拿到布局，进而返回ViewHolderreturnnewViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.list_cell,null));（2）onBindViewHolder：拿到ViewHolder中的控件对其赋值操作（3）getItemCount()：返回数组的size()[java]viewplaincopy在CODE上查看代码片派生到我的代码片publicclassMyAdapterextendsRecyclerView.Adapter{classViewHolderextendsRecyclerView.ViewHolder{TextViewtvTitle,tvContent;publicViewHolder(ViewitemView){super(itemView);tvTitle=(TextView)itemView.findViewById(R.id.tv_title);tvContent=(TextView)itemView.findViewById(R.id.tv_content);}}@OverridepublicRecyclerView.ViewHolderonCreateViewHolder(ViewGroupparent,intviewType){returnnewViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.list_cell,null));}@OverridepublicvoidonBindViewHolder(RecyclerView.ViewHolderholder,intposition){ViewHoldervh=(ViewHolder)holder;CellDatacd=data[position];vh.tvTitle.setText(cd.title);vh.tvContent.setText(cd.content);}@OverridepublicintgetItemCount(){returndata.length;}privateCellData[]data=newCellData[]{newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错),newCellData(recycleview,学习recycleview),newCellData(天气,今天天气不错)};}4、效果图，虽然很难看，但是是基本的实现方式。可见，RecyclerView和传统的ListView，GridView使用的流程是一样的，但是由于RecyclerView的高定制性，使用者越来越多，已经有大部分的开发者放弃使用ListView和GridView了。想要用好RecyclerView也不难，关键就在于Adapter的书写上，接下来介绍一个非常好用的RecyclerView万能适配器（BaseRecyclerViewAdapterHelper），前几天接触到的，感觉十分好用，所包含的功能有以下几个（官网介绍）：优化Adapter代码（减少百分之70%代码）添加点击item点击、长按事件、以及item子控件的点击事件添加加载动画（一行代码轻松切换5种默认动画）添加头部、尾部、下拉刷新、上拉加载（感觉又回到ListView时代）设置自定义的加载更多布局添加分组（随心定义分组头部）自定义不同的item类型（简单配置、无需重写额外方法）设置空布局（比Listview的setEmptyView还要好用！）添加拖拽item1、添加item点击、长按事件[java]viewplaincopy在CODE上查看代码片派生到我的代码片mQuickAdapter.setOnRecyclerViewItemClickListener();mQuickAdapter.setOnRecyclerViewItemLongClickListener();2、新增添加子布局多个控件的点击事件Adapter[java]viewplaincopy在CODE上查看代码片派生到我的代码片protectedvoidconvert(BaseViewHolderhelper,Statusitem){helper.setOnClickListener(R.id.tweetAvatar,newOnItemChildClickListener()).setOnClickListener(R.id.tweetName,newOnItemChildClickListener());}Activity[java]viewplaincopy在CODE上查看代码片派生到我的代码片mQuickAdapter.setOnRecyclerViewItemChildClickListener(