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qq做兼职给网站给你,足球外围网站自己做的,湖北免费相亲网站,织梦网站代码目录 后端数据接口数据格式 App客户端布局逻辑主界面布局 M#xff08;Model#xff09;V#xff08;View#xff09;P#xff08;Presenter#xff09;OkhttpRetrofitRxJava网络http请求 Mvp架构-初学者MVP架构的契约者 后端数据接口 接口地址#xff1a;https://apis.… 目录 后端数据接口数据格式 App客户端布局逻辑主界面布局 MModelVViewPPresenterOkhttpRetrofitRxJava网络http请求 Mvp架构-初学者MVP架构的契约者 后端数据接口 接口地址https://apis.tianapi.com/caipu/index 请求示例https://apis.tianapi.com/caipu/index?key你的APIKEYword黄瓜 支持协议http/https 请求方式get/post 返回格式utf-8 json 数据格式 {code: 200,msg: success,result: {curpage: 1,allnum: 5,newslist: [{id: 90e761e707dd996c431992c8e2a0a88b,ctime: 2023-07-07 08:29,title: 为避免轨道碰撞 SpaceX星链卫星6个月内“让路”,description: 7月7日消息在过去6个月里为了避免轨道碰撞埃隆·马斯克ElonMusk旗下SpaceX公司的星链卫星机动次数激增这引发了人们对卫星长期可持续性运行的担忧因为未来几年将有数万颗新卫星进入轨道。在最近向美国联邦通信委员会FCC…[],source: 网易科技,picUrl: https://nimg.ws.126.net/?urlhttp%3A%2F%2Fcms-bucket.ws.126.net%2F2023%2F0707%2F0f703849p00rxeh90001cc0009c0070c.pngthumbnail200y140quality100typejpg,url: https://www.163.com/tech/article/I91GDFVG00097U81.html},{id: e8e49d6dd77be1a6ea82929a14abe6ef,ctime: 2023-07-07 06:32,title: 推特指责 Meta 挖角员工创建 Threads,description: ,source: 网易科技,picUrl: https://nimg.ws.126.net/?urlhttp%3A%2F%2Fbjnewsrec-cv.ws.126.net%2Flittle730693cc23fj00rxebr3004xc000fw00lcg.jpgthumbnail200y140quality100typejpg,url: https://www.163.com/dy/article/I919NRS10511B8LM.html},{id: 55cf44c545e02e8d9fc30e8b07980d3d,ctime: 2023-07-06 21:08,title: 分析人士Meta的Threads对马斯克的Twitter构成,description: ,source: 网易科技,picUrl: https://nimg.ws.126.net/?urlhttp%3A%2F%2Fbjnewsrec-cv.ws.126.net%2Flittle32088c42c3cj00rxdlrp000xc000sg00hgg.jpgthumbnail200y140quality100typejpg,url: https://www.163.com/dy/article/I909EBMH0511B8LM.html},{id: 0bbc1f1f13121586804bb72e245448b2,ctime: 2023-07-06 20:26,title: 中国电信研究院副院长李安民发展元宇宙要提,description: ,source: 网易科技,picUrl: https://nimg.ws.126.net/?urlhttp%3A%2F%2Fbjnewsrec-cv.ws.126.net%2Flittle64910ee1b6bj00rxctez005jd000j600anp.jpgthumbnail200y140quality100typejpg,url: https://www.163.com/dy/article/I9071U0D0519DFFO.html},{id: 1962b01db3569398109fe336d5f8ff29,ctime: 2023-07-06 20:42,title: XR“失宠”头显出货量下降超三成元宇宙再降,description: ,source: 网易科技,picUrl: https://nimg.ws.126.net/?urlhttp%3A%2F%2Fbjnewsrec-cv.ws.126.net%2Flittle252508775e3j00rxdev60080c000se00fsg.jpgthumbnail200y140quality100typejpg,url: https://www.163.com/dy/article/I907V12305199NPP.html}]} }App客户端 MVP规范接口IView、IModel、IPresenter用于规范接口 package com.xzln.eatwhatjava.view;public interface IView {} // 用于规范View层接口package com.xzln.eatwhatjava.model;public interface IModel {} // 用于规范Model层接口package com.xzln.eatwhatjava.presenter;import com.xzln.eatwhatjava.view.IView;/*** 抽离公共接口* 所有的P层对象都公有* 而V层和M层对象则都是根据具体的业务进行定制* param V/ public interface IPresenterV extends IView {/** 依附生命view* param view v层对象/void attachView(V view);/** 分离View/void detachView();/** 判断View是否已经销毁* return 是否销毁/boolean isViewAttached(); } 回调规范接口ICallBack package com.xzln.eatwhatjava.contact;public interface ICallBackT, K {void onSuccess(T data);void onFail(K data); }布局逻辑 ViewPager2Fragment 其中Fragment由refreshLayoutRecycleView组成RecycleView放新闻条目。 ViewPager2用于对新闻进行分类 主界面布局 // activity_main.xml ?xml version1.0 encodingutf-8? LinearLayout xmlns:androidhttp://schemas.android.com/apk/res/androidxmlns:apphttp://schemas.android.com/apk/res-autoxmlns:toolshttp://schemas.android.com/toolsandroid:layout_widthmatch_parentandroid:layout_heightmatch_parenttools:context.view.MainActivityandroid:orientationverticalcom.google.android.material.tabs.TabLayoutandroid:idid/tab_layoutandroid:layout_widthmatch_parentandroid:layout_height40dpandroid:backgroundcolor/colorPrimaryapp:tabGravityfillapp:tabModefixedapp:tabTextColorandroid:color/white /androidx.viewpager2.widget.ViewPager2android:idid/view_pager2android:layout_widthmatch_parentandroid:layout_heightmatch_parent / /LinearLayoutMModel // INewsModel.java package com.xzln.eatwhatjava.model;import com.xzln.eatwhatjava.contact.ICallBack;/** 定义规范接口新闻* 单一接口的M层/ public interface INewsModel extends IModel {// post请求void getData(int page, int num, final ICallBack callback); }// NewsModel.java package com.xzln.eatwhatjava.model;import android.util.Log;import com.xzln.eatwhatjava.api.NewsApi; import com.xzln.eatwhatjava.bean.NewsListBean; import com.xzln.eatwhatjava.bean.Result; import com.xzln.eatwhatjava.config.NewsConfig; import com.xzln.eatwhatjava.contact.ICallBack; import com.xzln.eatwhatjava.utils.RetrofitUtils;import io.reactivex.Observable; import io.reactivex.Observer; import io.reactivex.android.schedulers.AndroidSchedulers; import io.reactivex.disposables.Disposable; import io.reactivex.schedulers.Schedulers; /** 定义了News功能模块的M层类* 调用retrofit网络API通过CallBack将数据传到P层* TODO: onNext中发生错误的情况 和 onError中发生错误的情况 都有哪些/ public class NewsModel implements INewsModel {public static final String TAG com.xzln.eatwhatjava.model.NewsModel;Overridepublic void getData(int page, int num, ICallBack callback) {fetchKejiNews(page, num).observeOn(AndroidSchedulers.mainThread()) // Android 主线程观察.subscribeOn(Schedulers.io()) // 消费.subscribe(new ObserverResultNewsListBean() { // URL访问成功Overridepublic void onSubscribe(Disposable d) {}Overridepublic void onNext(ResultNewsListBean newsListBeanResult) { // 数据迭代器?if (null newsListBeanResult) { callback.onFail(出现错误: null newsListBeanResult); } else if (newsListBeanResult.getCode() ! 200) { callback.onFail(newsListBeanResult.getMsg());} else { callback.onSuccess(newsListBeanResult); }}Overridepublic void onError(Throwable e) { // 访问错误或者数据解析错误e.printStackTrace();callback.onFail(出现错误: onError);}Overridepublic void onComplete() { Log.d(TAG, onComplete); }});}protected ObservableResultNewsListBean fetchKejiNews(int page, int num) {return RetrofitUtils.getRetrofit().create(NewsApi.class).fetchKejiNews(NewsConfig.getKejiNewsFieldMap(page, num));} } VView // INewsView.java package com.xzln.eatwhatjava.view;import com.xzln.eatwhatjava.presenter.IPresenter;/** 定义News功能模块的View类的规范接口* P层和V层的桥梁* param P P层对象类型* param T P层访问成功时返回的类型* param V P层访问失败时返回的类型/ public interface INewsViewP extends IPresenter, T, V extends IView{void showNewsSuccess(T newsBeans);void showNewsFail(V data); }package com.xzln.eatwhatjava.base;import android.os.Bundle; import androidx.annotation.Nullable; import androidx.fragment.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup;import com.xzln.eatwhatjava.presenter.IPresenter; import com.xzln.eatwhatjava.view.IView;/** 抽象类Fragment的公共抽象类* param P/ public abstract class BaseFragmentP extends IPresenter extends Fragment implements IView {protected P mPresenter; // P层对象用于和V层、M层进行联系protected View mView; // V层对象通过V层对象完成P和V之间的联系/** 完成P层对象的创建和初始化* param savedInstanceState If the fragment is being re-created from* a previous saved state, this is the state./Overridepublic void onCreate(Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);initPresenter();init();}/**** param inflater The LayoutInflater object that can be used to inflate any views in the fragment,* param container If non-null, this is the parent view that the fragments* UI should be attached to. The fragment should not add the view itself,* but this can be used to generate the LayoutParams of the view.* param savedInstanceState If non-null, this fragment is being re-constructed* from a previous saved state as given here.** return 视图对象/Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// Inflate the layout for this fragmentmView inflater.inflate(getLayoutId(), container, false);return mView;}/** Fragment销毁时先取消P层对象和Fragment的绑定避免空指针异常/Overridepublic void onDestroy() {if (mPresenter ! null mPresenter.isViewAttached()) {mPresenter.detachView();}super.onDestroy();}/** 创建和初始化P层对象将P层对象生命周期与当前Fragment绑定/protected void initPresenter() {mPresenter createPresenter();//绑定生命周期if (mPresenter ! null) {mPresenter.attachView(this);}}/** 抽象方法由子类根据对应的布局来实现返回其布局ID用于Fragment的OnCreateView* return 布局ID/public abstract int getLayoutId();/** 创建一个Presenter** return P层对象/protected abstract P createPresenter();/** 用于子类的其他数据的初始化/protected abstract void init();}//NewsFragment.java package com.xzln.eatwhatjava.view;import android.os.Bundle; import android.os.Handler; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup;import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;import com.xzln.eatwhatjava.R; import com.xzln.eatwhatjava.adapter.NewsRecycleViewAdapter; import com.xzln.eatwhatjava.base.BaseFragment; import com.xzln.eatwhatjava.bean.NewsBean; import com.xzln.eatwhatjava.presenter.NewsPresenter;import java.util.LinkedList; import java.util.List;/** News的布局碎片*/ public class NewsFragment extends BaseFragmentNewsPresenter implements INewsViewNewsPresenter, ListNewsBean, String {private static final String TAG com.xzln.eatwhatjava.view.NewsFragment;protected int mNewsType; // News的类别由创建者传入protected SwipeRefreshLayout mSwipeRefreshLayout; // 顶部的刷新布局protected RecyclerView mRecycleView;protected ListNewsBean mNewsBeans; // 数据列表protected int mCurPage 0; // 当前页码protected int mNumOfPage 25; // 每页中数据数目protected NewsRecycleViewAdapter mNewsRecycleViewAdapter; // RecycleView适配器protected LinearLayoutManager mLinearLayoutManager;private int mTotalItemCount;/recycleView下的总item数目/private int mFirstVisibleItem;/当前可见区内最后一个item的position/private int mLastVisibleItem;/当前可见区内最后一个item的position//Return the current number of child views attached to the parent RecyclerView./private int mVisibleItemCount;/当前recycleView下可见的item数/public NewsFragment(int newsType) { mNewsType newsType; }/*** 刷新时调用页码清零、数据清空、重新获取数据/protected void refreshView() {mCurPage 0;mNewsBeans.clear();mNewsRecycleViewAdapter.clearData();mPresenter.getNewsData(mCurPage, mNumOfPage);}NullableOverridepublic View onCreateView(NonNull LayoutInflater inflater, Nullable ViewGroup container, Nullable Bundle savedInstanceState) {return super.onCreateView(inflater, container, savedInstanceState);}Overridepublic void onViewCreated(NonNull View view, Nullable Bundle savedInstanceState) {super.onViewCreated(view, savedInstanceState);mSwipeRefreshLayout mView.findViewById(R.id.layout_swipe_refresh);mRecycleView mView.findViewById(R.id.view_recycle);// mPresenter.getNewsData(mCurPage, mNumOfPage);refreshView();setupListener();}/** 用于创建P层对象由子类具体定制实现* return P层对象/Overrideprotected NewsPresenterNewsFragment createPresenter() { return new NewsPresenter(this); }/** 由子类定制用于完成子类中的数据初始化* 视图id的绑定不可在这完成。因为视图View对象的生成在OnCreateView而init函数在OnCreate中/Overrideprotected void init() {mNewsBeans new LinkedList();mNewsRecycleViewAdapter new NewsRecycleViewAdapter(getActivity(), mNewsBeans);}/** return 视图布局文件的ID/Overridepublic int getLayoutId() { return R.layout.activity_fragment_main; }/** 启动监听器* 1. 刷新头* 2. RecycleView适配器、布局管理器*/private void setupListener() {mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {Overridepublic void onRefresh() {Log.d(TAG, mSwipeRefreshLayout.setOnRefreshListener.onRefresh); // mSwipeRefreshLayout.setRefreshing(false);refreshView();new Handler().postDelayed(new Runnable() {Overridepublic void run() { mSwipeRefreshLayout.setRefreshing(false); }},2000);}});mLinearLayoutManager new LinearLayoutManager(getActivity());mRecycleView.setLayoutManager(mLinearLayoutManager);mRecycleView.setAdapter(mNewsRecycleViewAdapter);/recycleView/mRecycleView.addOnScrollListener(new RecyclerView.OnScrollListener() {Overridepublic void onScrollStateChanged(NonNull RecyclerView recyclerView, int newState) {super.onScrollStateChanged(recyclerView, newState);Log.d(TAG, onScrollStateChanged – newState newState);// 获取数据逻辑// 滚动状态改变 最后一个position 1 totalif (newState RecyclerView.SCROLL_STATE_DRAGGING mLastVisibleItem 1 mTotalItemCount mVisibleItemCount mTotalItemCount) {mPresenter.getNewsData(mCurPage, mNumOfPage);}Overridepublic void onScrolled(NonNull RecyclerView recyclerView, int dx, int dy) {super.onScrolled(recyclerView, dx, dy);mLinearLayoutManager.findFirstVisibleItemPosition();mTotalItemCount mLinearLayoutManager.getItemCount();mFirstVisibleItem mLinearLayoutManager.findFirstVisibleItemPosition();mLastVisibleItem mLinearLayoutManager.findLastVisibleItemPosition();/当前可见区内最后一个item的position//Return the current number of child views attached to the parent RecyclerView./mVisibleItemCount mLinearLayoutManager.getChildCount();/当前recycleView下可见的item数/}});}/*** 与P层联系的函数* param newsBeans P层成功返回的数据/Overridepublic void showNewsSuccess(ListNewsBean newsBeans) {Log.d(TAG, showNewsSuccess newsBeans.size() newsBeans.size());mNewsRecycleViewAdapter.addData(newsBeans);}/** 与P层联系的函数* param data P层失败返回的数据/Overridepublic void showNewsFail(String data) {Log.d(TAG, showNewsSuccess);} } PPresenter // IPresenter.java package com.xzln.eatwhatjava.presenter;import com.xzln.eatwhatjava.view.IView;/** 抽离公共接口* 所有的P层对象都公有* param V/ public interface IPresenterV extends IView {/** 依附生命view* param view v层对象/void attachView(V view);/** 分离View/void detachView();/** 判断View是否已经销毁* return 是否销毁/boolean isViewAttached(); } // BasePresenter.java package com.xzln.eatwhatjava.base;import com.xzln.eatwhatjava.presenter.IPresenter; import com.xzln.eatwhatjava.view.IView;/** IPresenter接口需要所有的P层实现类继承* 对于生命周期这部分功能P层都是通用的,因此可以抽出来一个抽象基类BasePresenter,去实现IPresenter的接口.* param V/ public abstract class BasePresenterV extends IView implements IPresenterV {protected V mView;Overridepublic void attachView(V view) { mView view; }Overridepublic void detachView() { mView null; }Overridepublic boolean isViewAttached() { return mView ! null; } }P层对象中持有V层对象和M层对象 P层调用M层获取数据并设置CallBack。通过CallBack完成M层和P层间的联系。 在CallBack中调用View对象完成P层与V层的联系。 // NewsPresenter.java package com.xzln.eatwhatjava.presenter;import android.util.Log;import com.xzln.eatwhatjava.base.BasePresenter; import com.xzln.eatwhatjava.bean.NewsListBean; import com.xzln.eatwhatjava.bean.Result; import com.xzln.eatwhatjava.contact.ICallBack; import com.xzln.eatwhatjava.model.INewsModel; import com.xzln.eatwhatjava.model.NewsModel; import com.xzln.eatwhatjava.view.INewsView; import com.xzln.eatwhatjava.view.IView;/** News功能模块P层逻辑* param V/ public class NewsPresenterV extends IView extends BasePresenterV {private static final String TAG com.xzln.eatwhatjava.presenter.NewsPresenter;protected INewsView mNewsView;protected INewsModel mNewsModel;public NewsPresenter(V view) {mNewsView (INewsView) view;createModel();}private void createModel() {if (mNewsModel null) { mNewsModel new NewsModel(); }}public void getNewsData(int page, int num) {mNewsModel.getData(page, num,new ICallBackResultNewsListBean, String() { // P层定义CallBack从而将数据从Overridepublic void onSuccess(ResultNewsListBean data) {Log.d(TAG, .getData.onSuccess);mNewsView.showNewsSuccess(data.getResult().getNewslist());}Overridepublic void onFail(String data) {mNewsView.showNewsFail(数据获取失败);Log.d(TAG, .getData.onFail – data);}});} } // ICallBack.java package com.xzln.eatwhatjava.contact;public interface ICallBackT, K {void onSuccess(T data);void onFail(K data); }OkhttpRetrofitRxJava网络http请求 RetrofitUtil //RetrofitUtils.java package com.xzln.eatwhatjava.utils;import com.xzln.eatwhatjava.config.NewsConfig;import java.util.concurrent.TimeUnit;import okhttp3.OkHttpClient; import retrofit2.Retrofit; import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory; import retrofit2.converter.gson.GsonConverterFactory;public class RetrofitUtils {private static Retrofit retrofit;private static OkHttpClient okhttp;/** 自定义okhttp客户端** return okhttp客户端/public static OkHttpClient getOkhttp() {if (okhttp null) {synchronized (RetrofitUtils.class) {if (okhttp null) {okhttp new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS).readTimeout(15, TimeUnit.SECONDS).writeTimeout(15, TimeUnit.SECONDS).build();}}}return okhttp;}/** 单例retrofit客户端** return retrofit客户端*/public static Retrofit getRetrofit() {if (retrofit null) {synchronized (RetrofitUtils.class) {if (retrofit null) {retrofit new Retrofit.Builder().baseUrl(NewsConfig.newsBaseUrl).addCallAdapterFactory(RxJava2CallAdapterFactory.create()).addConverterFactory(GsonConverterFactory.create()).client(getOkhttp()).build();}}}return retrofit;} } //NewsApi.java package com.xzln.eatwhatjava.api;import com.xzln.eatwhatjava.bean.NewsListBean; import com.xzln.eatwhatjava.bean.Result;import java.util.Map; import io.reactivex.Observable; import retrofit2.http.FieldMap; import retrofit2.http.FormUrlEncoded; import retrofit2.http.POST;public interface NewsApi {// POST请求数据FormUrlEncodedPOST(keji/index)ObservableResultNewsListBean fetchKejiNews(FieldMap MapString, Object map); // ObservableResultListNewsBean fetchKejiNews(FieldMap MapString, Object map); } Mvp架构-初学者 MVP架构是为了让各个模块之间降低耦合方便维护也可以让代码更简洁让代码简洁的意思是让代码更清晰并不是让代码更少MVP契约者是为了进一步的低耦合、接口统一管理。 MVP对接口灵活的调用可以轻松的应对产品的变更。 presenter 类与View 和 Model 通信做到视图和逻辑的解耦。 MVP架构的契约者 TODO