javascript 缓存系统

@[TOC]目录

基础实现方案

1 重写 getItemViewType()classMultiTypeAdapter(privatevalitems:ListListItem):RecyclerView.AdapterRecyclerView.ViewHolder(){companionobject{constvalTYPE_HEADER=0constvalTYPE_TEXT=1constvalTYPE_IMAGE=2constvalTYPE_FOOTER=3}overridefungetItemViewType(position:Int):Int{returnwhen(items[position].type){"header"-TYPE_HEADER"text"-TYPE_TEXT"image"-TYPE_IMAGE"footer"-TYPE_FOOTERelse-TYPE_TEXT}}overridefunonCreateViewHolder(parent:ViewGroup,viewType:Int):RecyclerView.ViewHolder{returnwhen(viewType){TYPE_HEADER-HeaderViewHolder(createView(parent,R.layout.item_header))TYPE_TEXT-TextViewHolder(createView(parent,R.layout.item_text))TYPE_IMAGE-ImageViewHolder(createView(parent,R.layout.item_image))TYPE_FOOTER-FooterViewHolder(createView(parent,R.layout.item_footer))else-TextViewHolder(createView(parent,R.layout.item_text))}}overridefunonBindViewHolder(holder:RecyclerView.ViewHolder,position:Int){when(holder){isHeaderViewHolder-holder.bind(items[position]asHeaderItem)isTextViewHolder-holder.bind(items[position]asTextItem)isImageViewHolder-holder.bind(items[position]asImageItem)isFooterViewHolder-holder.bind(items[position]asFooterItem

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