RecyclerView 多类型布局方案

@[TOC]目录

1. 基础实现方案

1.1 重写 getItemViewType()

classMultiTypeAdapter(privatevalitems:List<ListItem>):RecyclerView.Adapter<RecyclerView.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