Android kotlin使用RecyclerView实例

1、创建entity类

class InternentBarEntity {var bname: String? = nullvar barea: String? = nullvar badddata: String? = nullvar bimage: String? = nullvar bid: String? = null
}

2、创建adapter类

/***作者：created by meixi*邮箱：15913707499@163.com*日期：2019/5/29 10*/
class InternetBarAdapter( private val entityList: List<InternentBarEntity>) : RecyclerView.Adapter<InternetBarAdapter.ViewHolder>() {private var mOnItemClickListener: OnItemClickListener? = nulloverride fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {val view = LayoutInflater.from(parent.context).inflate(R.layout.tab_item, null)return ViewHolder(view)}override fun onBindViewHolder(holder: ViewHolder, position: Int) {val entity = entityList[position]try {holder.item_intnbname.text = entity.bname} catch (e: Exception) {e.printStackTrace()}//判断是否设置了监听器if (mOnItemClickListener != null) {//为ItemView设置监听器-holder.itemView.setOnClickListener {val position = holder.layoutPosition // 1mOnItemClickListener!!.onItemClick(holder.itemView, position) // 2}}}override fun getItemCount(): Int {return entityList.size}inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {var item_intnbname = itemView.findViewById(R.id.tab_tv) as TextView}//  删除 打勾 全选fun cleckAll(is_checked: Int) { //全选 删除多少那里要删除全部for (a in entityList.indices) {if (is_checked == a) {entityList.get(a).bname = "选中了"} else {}}notifyDataSetChanged()}interface OnItemClickListener {fun onItemClick(view: View, position: Int)}fun setOnItemClickListener(onItemClickListener: OnItemClickListener) {this.mOnItemClickListener = onItemClickListener}
}

3、添加recyclerview依赖

compile('com.android.support:recyclerview-v7:25.1.1') {force = true
}

4、加载数据实现kotlin 代码

private val barEntityList = ArrayList<InternentBarEntity>()
private var barAdapter: InternetBarAdapter? = null
private var lastposion: Int = 0
private var pagenum = 1
private var pageContent:Int = 0
private var pageSize = 10

  public fun initrecycleView(){var internentBarEntity2:InternentBarEntity= InternentBarEntity()internentBarEntity2.badddata = "地址122"internentBarEntity2.bname="名称111222"barEntityList.add(internentBarEntity2)for (a in 0..19) {var internentBarEntity:InternentBarEntity=InternentBarEntity()internentBarEntity.badddata = "地址1"internentBarEntity.bname="名称111=="+abarEntityList.add(internentBarEntity)
//            if (a==6){
//                break
//            }}barAdapter = InternetBarAdapter( barEntityList)barAdapter!!.setOnItemClickListener(object : InternetBarAdapter.OnItemClickListener {override fun onItemClick(view: View, position: Int) {barAdapter!!.cleckAll(position)LgqLogutil.e("ITEM"+position)}})mRecyclerView.layoutManager = LinearLayoutManager(context)mRecyclerView.adapter = barAdaptermRecyclerView.isNestedScrollingEnabled = false//禁止滑动mRecyclerView.isFocusable = false//导航栏切换不再focusemRecyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {//用来标记是否正在向最后一个滑动，既是否向右滑动或向下滑动internal var isSlidingToLast = falseoverride fun onScrollStateChanged(recyclerView: RecyclerView?, newState: Int) {val manager = recyclerView!!.layoutManager as LinearLayoutManager// 当不滚动时if (newState == RecyclerView.SCROLL_STATE_IDLE) {//获取最后一个完全显示的ItemPositionlastposion = manager.findLastCompletelyVisibleItemPosition()//                    Log.i("lgq","..........dddddd====="+"....."+lastposion);val totalItemCount = manager.itemCountif (lastposion == totalItemCount - 1 && isSlidingToLast) {pagenum++if (pagenum > pageContent) {Toast.makeText(activity,"yidaodi",Toast.LENGTH_LONG).show()return}}}}override fun onScrolled(recyclerView: RecyclerView?, dx: Int, dy: Int) {super.onScrolled(recyclerView, dx, dy)//dx用来判断横向滑动方向，dy用来判断纵向滑动方向//大于0表示，正在向右滚动；小于等于0 表示停止或向左滚动isSlidingToLast = dy > 0}})}

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