Android kotlin使用RecyclerView实例

1、创建entity类

class InternentBarEntity {

    var bname: String? = null
    var barea: String? = null
    var badddata: String? = null
    var bimage: String? = null
    var bid: String? = null
}

2、创建adapter类

/**
 *作者：created by meixi
 *邮箱：[email protected]
 *日期：2019/5/29 10
 */
class InternetBarAdapter( private val entityList: List<InternentBarEntity>) : RecyclerView.Adapter<InternetBarAdapter.ViewHolder>() {
    private var mOnItemClickListener: OnItemClickListener? = null

    override 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 // 1
                mOnItemClickListener!!.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=="+a
            barEntityList.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 = barAdapter
        mRecyclerView.isNestedScrollingEnabled = false//禁止滑动
        mRecyclerView.isFocusable = false//导航栏切换不再focuse
        mRecyclerView.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 = false

            override 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ItemPosition
                    lastposion = manager.findLastCompletelyVisibleItemPosition()
                    //                    Log.i("lgq","..........dddddd====="+"....."+lastposion);
                    val totalItemCount = manager.itemCount
                    if (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
            }
        })
    }

bug在线交流：QQ1085220040

效果：