為什么80%的碼農(nóng)都做不了架構(gòu)師？>>> ??

前言

根據(jù)網(wǎng)絡(luò)上的MVP套路寫(xiě)了一個(gè)辣雞MVP DEMO

用到的

• android studio MVPHelper插件,方便自動(dòng)生成框架代碼
• rxjava
• retrofit

什么是MVP

MVP就是英文的Model View Presenter，然而實(shí)際分包并不是只有這三個(gè)包,還有一個(gè)契約Contract接口包，根據(jù)項(xiàng)目情況還可以分更多包

• Contract
• Model
• View 指activity和fragment，需要實(shí)現(xiàn)View接口
• Presenter

Contract

定義Model、View、Presenter接口的方法，所有接口都在這里定義

public interface HomeContract {interface Model {void getDate(final BaseCallBack<TitleListBean> callBack);}interface View {//多個(gè)事件定義多個(gè)刷新頁(yè)面方法void refreshUi(List<TitleListBean.ContentsBean> list);}interface Presenter {void load();} }

Model

網(wǎng)絡(luò)及本地?cái)?shù)據(jù)請(qǐng)求操作，包括遠(yuǎn)程數(shù)據(jù)和本地?cái)?shù)據(jù)的請(qǐng)求處理
遠(yuǎn)程數(shù)據(jù)用retrofit+rxjava實(shí)現(xiàn)，本地?cái)?shù)據(jù)用room+rxjava，無(wú)論用什么方法最后都要通過(guò)callback返回結(jié)果

public class HomeModel implements HomeContract.Model {//獲取數(shù)據(jù)public void getDate(final PresenterBaseCallBack<TitleListBean> callBack) {ApiService apiService = RetrofitUtil.getRetorfit().create(ApiService.class);apiService.getList().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new BaseObserver<TitleListBean>() {@Overridepublic void onNext(TitleListBean model) {Log.d(TAG, "獲取數(shù)據(jù)成功 ");callBack.onResponse(model); //成功的數(shù)據(jù)請(qǐng)求結(jié)果}@Overridepublic void onError(Throwable e) {e.printStackTrace(); //請(qǐng)求過(guò)程中發(fā)生錯(cuò)誤callBack.onFailure("獲取數(shù)據(jù)失敗"); //失敗的數(shù)據(jù)請(qǐng)求結(jié)果}@Overridepublic void onComplete() {Log.d(TAG, "刷新頁(yè)面 ");}});} }

Presenter

可以理解為界面的點(diǎn)擊、加載等事件的實(shí)現(xiàn)
作為view與model的橋梁，初始化的時(shí)候需要傳入view對(duì)象和new一個(gè)model對(duì)象
通過(guò)view調(diào)用presenter，presenter調(diào)用model，model返回?cái)?shù)據(jù)給presenter，presenter再返回?cái)?shù)據(jù)給view展示

public class HomePresenter implements HomeContract.Presenter {private HomeContract.View homeView;private HomeContract.Model homeModel;private Context mContext;public HomePresenter(HomeContract.View view) {this.homeView = view;this.homeModel = new HomeModel();}@Overridepublic void load() {/*** Presenter層邏輯處理* Presenter已經(jīng)包含model與view對(duì)象* 1.通過(guò)model獲取數(shù)據(jù),new一個(gè)callback對(duì)象作為參數(shù)* 2.callback對(duì)象根據(jù)model返回的結(jié)果執(zhí)行view的refreshUi方法刷新頁(yè)面*/this.homeModel.getDate(new PresenterBaseCallBack<TitleListBean>() {@Overridepublic void onResponse(TitleListBean response) {homeView.refreshUi(response.getContents());}@Overridepublic void onFailure(String error) {}});} }

CallBack

這個(gè)接口屬于Presenter層，也是model與view的橋梁，把model處理的結(jié)果告訴presenter,presenter根據(jù)處理結(jié)果告訴view刷新頁(yè)面

public interface PresenterBaseCallBack<T> {void onResponse(T response);void onFailure(String error); }

VIEW

創(chuàng)建presenter對(duì)象，view的所有事件就是對(duì)應(yīng)presenter的方法

public class HomeFragment extends BaseFragment implements HomeContract.View {private HomeContract.Presenter presenter;@Overrideprotected void initView(Bundle savedInstanceState) {presenter = new HomePresenter(this,getContext()); //初始化Presenter，包含view和modelpresenter.load(); //Presenter層邏輯處理}@Overridepublic void refreshUi(List<TitleListBean.ContentsBean> list) { //數(shù)據(jù)獲取成功后的頁(yè)面刷新//list 就是返回的數(shù)據(jù),執(zhí)行頁(yè)面刷新} }

一個(gè)辣雞Demo

戳這里

轉(zhuǎn)載于:https://my.oschina.net/AStar/blog/2244802

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