1，java

RecyclerView mRecyclerView;List<> mList = new ArrayList();public void initWidget() {    setContentView(R.layout.activity_main);    VarietyAdapter varietyAdapter = new VarietyAdapter(mList);    mRecyclerView = (RecyclerView) findViewById(R.id.variety_selection_recyclerView);    //瀑布流，列数是5    StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(5, StaggeredGridLayoutManager.VERTICAL);    //线性    //LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);    //卡片    //GridLayoutManager mGridLayoutManager = new GridLayoutManager(this,5);    mRecyclerView.setLayoutManager(staggeredGridLayoutManager);    //设置recycler拥有固定的大小，提高展示效率    mRecyclerView.setHasFixedSize(true);    //设置默认的动画，在移除和添加的效果下展现，现在github上可以找到许多拓展，有兴趣的可以找找    //admBinding.modulationRecyclerView.setItemAnimator(new DefaultItemAnimator());    mRecyclerView.setAdapter(varietyAdapter);    //点击事件需要自己写在Adapter里    varietyAdapter.setOnItemClickListener(this);    //刷新列表-数据变更时    varietyAdapter.refresh(mList);}

2,适配器Adapter

public class VarietyAdapter extends RecyclerView.Adapter implements View.OnClickListener,View.OnLongClickListener{//    private TextView name;    List
    
      mList;    public VarietyAdapter(List
     
       list) {        mList = list;    }    class ViewHolder extends RecyclerView.ViewHolder{        private TextView name;        public ViewHolder(View itemView) {            super(itemView);            name = (TextView) itemView.findViewById(R.id.item_text);        }        public TextView getName() {            return name;        }    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item,null);        ViewHolder viewHolder = new ViewHolder(view);        //用于OnItemClickLitener的点击事件        view.setOnClickListener(this);        view.setOnLongClickListener(this);        return viewHolder;    }    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {        ViewHolder vh = (ViewHolder) holder;        vh.getName().setText(mList.get(position));        //用于OnItemClicklistener的position 标记        vh.itemView.setTag(position);    }    @Override    public int getItemCount() {        return mList.size();    }    //刷新数据- - -添加    public void  addItem(List
      
        list,int postion){        mList = list;        //新添加一条        notifyItemInserted(postion);    }    //刷新数据- - -删除    public void deleteItem(List
       
         list,int postion){        mList = list;        //删除一条        notifyItemRemoved(postion);    }    //刷新数据- - -全部，一般用这个就好    public void refresh(List
        
          list) {        mVarietyList = list;        notifyDataSetChanged();//刷新全部数据    }    //    /**     * 定义item点击事件||||     * */    //子布局的点击事件    public void onClick(View v) {        if (mOnItemClickListener != null) {            //注意这里使用getTag方法获取数据            mOnItemClickListener.onItemClick(v, Integer.parseInt(v.getTag().toString()));        }    }    //    private OnRecyclerViewItemClickListener mOnItemClickListener = null;    //define interface    public static interface OnRecyclerViewItemClickListener {        void onItemClick(View view, int position);    }    public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {        this.mOnItemClickListener = listener;    }    /**长按点击事件*/    @Override    public boolean onLongClick(View v) {        if (mOnItemLongClickListener != null) {            //注意这里使用getTag方法获取数据            mOnItemLongClickListener.onItemLongClick(v, Integer.parseInt(v.getTag().toString()));        }        return false;    }    private OnRecyclerViewItemLongClickListener mOnItemLongClickListener = null;    public static interface OnRecyclerViewItemLongClickListener {        void onItemLongClick(View view, int position);    }    public void setOnItemLongClickListener(OnRecyclerViewItemLongClickListener listener) {        this.mOnItemLongClickListener = listener;    }}