RecyclerView自定义CommonBaseAdapter

adapter viewholder

import android.support.v7.widget.RecyclerView
import android.util.SparseArray
import android.view.View
import android.widget.TextView
/**
 * Created by cxm on 16/7/27.
 */
class BaseViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    private val sparseArray = SparseArray<View>(8)
    fun <T : View> getView(viewId: Int): T {
        var view = sparseArray[viewId]
        if (view == null) {
            view = itemView.findViewById(viewId)
            sparseArray.put(viewId, view)
        }
        return view as T
    }
    fun setText(viewId: Int, text: String): BaseViewHolder {
        getView<TextView>(viewId).text = text
        return this
    }
}

import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.ViewGroup
import java.util.*
/**
 * Created by cxm on 16/7/27.
 */
abstract class CommonBaseAdapter<T>(var rv: RecyclerView, var itemLayout: Int, var inflater: LayoutInflater) : RecyclerView.Adapter<BaseViewHolder>() {
    protected var datas: ArrayList<T> = ArrayList()
        set(value) {
            datas = value
            notifyDataSetChanged()
        }
    fun addData(data: T) {
        datas.add(data)
    }
    override fun getItemCount(): Int = datas.size
    override fun onBindViewHolder(holder: BaseViewHolder?, position: Int) = bindViewData(holder, datas[position], position)
    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): BaseViewHolder {
        var view = inflater.inflate(itemLayout, parent, false)
        var viewHolder = BaseViewHolder(view)
        viewHolder.setIsRecyclable(true)
        return viewHolder
    }
    abstract fun bindViewData(holder: BaseViewHolder?, item: T, position: Int)
}