RecyclerView 获取item，删除item的坑

场景：点击子布局中的imageview替换其图片，可以对imageview进行点击事件监听，也可以用一种更优雅的方式获取item，且使用简单。

获取item

自定义ViewHolder

public class ViewHolder extends RecyclerView.ViewHolder {    private Context mContext;    private View mItemView;    private SparseArray<View> mViews;    public ViewHolder(View itemView) {        super(itemView);        mViews=new SparseArray<>();        mItemView=itemView;        mItemView.setTag(this);    }    public static ViewHolder getHolder(Context context, View itemview,ViewGroup parent,int layoutid){        if (itemview==null){            itemview= LayoutInflater.from(context).inflate(layoutid,parent,false);            return new ViewHolder(itemview);        }else {            ViewHolder vh= (ViewHolder) itemview.getTag();            return vh;        }    }    public <T extends View> T getView(int id){        View view=mViews.get(id);        if (view==null){            view=mItemView.findViewById(id);            mViews.put(id,view);        }        return (T) view;    }    public void setImageRes(int id,int res){        ImageView img= (ImageView) mItemView.findViewById(id);        img.setImageResource(res);    }    public void setText(int id,String str){        TextView tv= (TextView) mItemView.findViewById(id);        tv.setText(str);    }    public void setOnClick(int id, View.OnClickListener onClickListener){        mItemView.findViewById(id).setOnClickListener(onClickListener);    }}

使用

    @Override    public CViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        return CViewHolder.getHolder(parent.getContext(), null, parent, R.layout.item_collection);    }    @Override    public void onBindViewHolder(final CViewHolder holder, final int position) {        holder.setImageRes(R.id.iv_item_collectionimg, mModels.get(position).getImgres());        holder.setText(R.id.tv_item_collectiongdes,mModels.get(position).getDes());}

删除item坑

 mModels.remove(i); notifyItemRemoved(i); //必须调用这行代码 notifyItemRangeChanged(i, mModels.size());