android MVP模式使用

model 负责数据获取

class ListModel {    fun getListData(page:Int,listener:ListLoadingListener){ Handler(Looper.getMainLooper()).postDelayed({     var arrayList = ArrayList<ListBean>()     for (item in 1..10){  arrayList.add(ListBean("pageList=>${item}", "page*item",page.toString()))     }     listener.loadSuccess(arrayList) },1000)    }}interface ListLoadingListener{    fun loadSuccess(listData:ArrayList<ListBean>)    fun loadError()}

viewI 界面的动作处理

interface ListViewI {    fun getCurrPage():Int    fun setCurrPageData(listData:ArrayList<ListBean>)    fun toRefreshAt()    fun toUpLoadAt()}

presenter

class ListPresenter {    var iView:ListViewI    var listModel: ListModel    constructor(iView:ListViewI){ this.iView = iView listModel = ListModel()    }    fun getListData(){    //这里model去拿数据     //而请求条件、处理结果是通过iView在acitivity的实现去处理 listModel.getListData(iView.getCurrPage(),object :ListLoadingListener{     override fun loadSuccess(listData: ArrayList<ListBean>) {  LogUtil.e(">>>>${Gson().toJson(listData)}")  iView.setCurrPageData(listData)     }     override fun loadError() {  LogUtil.e("出错了")     } })    }}

activity

class ListActivity : BaseActivity(), ListViewI {    private var currNum: Int = 1;    var pageList = ArrayList<ListBean>();    private lateinit var listAdapter:ListAdapter    private lateinit var mListPresenter:ListPresenter    private lateinit var moreModule: BaseLoadMoreModule    val mThis by lazy { this }    override fun setLayout(): Int { return R.layout.activity_list    }    override fun initView() { listAdapter = ListAdapter(R.layout.item_list,pageList) recyclerView.layoutManager = LinearLayoutManager(this) recyclerView.adapter = listAdapter refreshLayout.setOnRefreshListener {     toRefreshAt()     refreshLayout.isRefreshing = false } moreModule = listAdapter.loadMoreModule moreModule.setOnLoadMoreListener {     toUpLoadAt() } listAdapter.setOnItemClickListener { adapter, view, position ->     Toast.makeText(mThis, "go go go-> $position", Toast.LENGTH_SHORT).show() } mListPresenter = ListPresenter(this) mListPresenter.getListData()    }    override fun getCurrPage(): Int { return currNum    }    override fun setCurrPageData(listData:ArrayList<ListBean>)  { //刷新界面 if (currNum==1){     pageList.clear()     pageList.addAll(listData)     listAdapter.notifyDataSetChanged() }else{     listAdapter.addData(listData) } moreModule.loadMoreComplete()    }    override fun toRefreshAt() { currNum = 1 mListPresenter.getListData()    }    override fun toUpLoadAt() { currNum++ mListPresenter.getListData()    }}

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