我们可以把 Adapter 精简到什么地步

recyclerView.adapter = SingleAdapter<String>(R.layout.item_main_1) { holder ->
    // holder.data 数据源
    // holder.setXXX 快捷设置数据
    // holder.getView(id) 获取指定ID的View
    
    // way 1
    holder.itemView.contentTv.text = holder.data
    // way 2
    holder.setText(R.id.contentTv, holder.data)
    // way 3
    holder.getView<TextView>(R.id.contentTv).text = holder.data
  
    // do something
}

implementation 'me.codego:adapter:1.0.3'

class AnimalAdapter : BetterAdapter<Animal>() {
  companion object {
    private const val TYPE_DOG = 1
    private const val TYPE_CAT = 2
  }
  // 自定义规则进行区分类型
  override fun getItemViewType(position: Int): Int {
    return when (getItem(position)) {
      is Dog -> TYPE_DOG
      else -> TYPE_CAT
    }
  }
  override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder<Animal> {
    return when (viewType) {
      TYPE_DOG -> DotViewHolder(inflateChildView(parent, R.layout.item_main_1))
      else -> CatViewHolder(inflateChildView(parent, R.layout.item_main_2))
    }
  }
  class DotViewHolder(view: View) : ViewHolder<Animal>(view) {
    // 绑定数据
    override fun bind(data: Animal) {
      super.bind(data)
      setText(R.id.contentTv, data.getName())
    }
  }
  class CatViewHolder(view: View) : ViewHolder<Animal>(view) {
    // 绑定数据
    override fun bind(data: Animal) {
      super.bind(data)
      setText(R.id.adTv, data.getName())
    }
  }
}