Android Retrofit+RxJava+MVP封装

最新推荐文章于 2019-02-28 01:14:13 发布

Gorky_19

最新推荐文章于 2019-02-28 01:14:13 发布

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本文链接：https://blog.youkuaiyun.com/Gorky_19/article/details/78769031

本文介绍了一个基于Retrofit网络请求库与MVP设计模式相结合的Android应用开发案例，详细展示了如何利用Retrofit进行网络数据获取，并通过MVP模式进行业务逻辑的分层管理。

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package http;

import java.util.List;
import java.util.Map;

import Bean.MessageBean;
import Bean.News;
import io.reactivex.Flowable;
import retrofit2.http.GET;
import retrofit2.http.QueryMap;

public interface ApiService {
    @GET("93app/data.do")
    Flowable<MessageBean<List<News>>> getNews(@QueryMap Map<String,String> map);
}

package http;
import com.jakewharton.retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.GsonConverterFactory;
import retrofit2.Retrofit;

 public class RetrofitUtils {
    private static volatile RetrofitUtils instance;
    private final Retrofit retrofit;
    private final ApiService apiService;

    public RetrofitUtils() {
        retrofit = new Retrofit.Builder()
                .baseUrl("http://www.93.gov.cn/")
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build();
        apiService = retrofit.create(ApiService.class);
    }
    public static RetrofitUtils getInstance() {
        if(instance == null) {
            synchronized (RetrofitUtils.class) {
                if(null == instance) {
                    instance = new RetrofitUtils();
                }
            }
        }
            return instance;
    }
    public ApiService getApiService() {
        return apiService;
    }
}

package model;import java.util.Map;
public interface IModel {
void getData(Map<String,String> map);
}

package model;

import java.util.List;
import java.util.Map;

import Bean.MessageBean;
import Bean.News;
import http.RetrofitUtils;
import io.reactivex.Flowable;
import presenter.NewsPresenter;

/**
 * Created by ZhangTAO on 2017/12/6.
 */

public class NewsModel implements IModel{
    private NewsPresenter presenter;
    public NewsModel(NewsPresenter newsPresenter) {
        this.presenter = newsPresenter;
    }
    @Override
    public void getData(Map<String, String> map) {
        Flowable<MessageBean<List<News>>> flowable = RetrofitUtils.getInstance().getApiService().getNews(map);
        presenter.getNews(flowable);
    }
}

然后写Presenter层：

package presenter;

import java.util.Map;

/**
 * Created by ZhangTAO on 2017/12/6.
 */

public interface BasePresenter {
    void getData(Map<String,String> map);
}

package presenter;

import java.util.List;
import java.util.Map;

import Bean.MessageBean;
import Bean.News;
import io.reactivex.Flowable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subscribers.DisposableSubscriber;
import model.NewsModel;
import view.IView;

/**
 * Created by ZhangTAO on 2017/12/6.
 */

public class NewsPresenter implements BasePresenter{
    private IView iv;
    private DisposableSubscriber subscriber;

    public void attachView(IView iv) {
        this.iv = iv;
    }
    public void detachView() {
        if(iv != null) {
            iv = null;
        }
        if(subscriber != null) {
            if(!subscriber.isDisposed()) {
               subscriber.dispose();
            }
        }
    }
    @Override
    public void getData(Map<String, String> map) {
        NewsModel model = new NewsModel(this);
        model.getData(map);
    }
    public void getNews(Flowable<MessageBean<List<News>>> flowable) {
        subscriber = flowable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeWith(new DisposableSubscriber<MessageBean<List<News>>>() {
                    @Override
                    public void onNext(MessageBean<List<News>> listMessageBean) {
                        if(listMessageBean != null) {
                            List<News> list = listMessageBean.getData();
                            if(list!=null) {
                                iv.onSuccess(list);
                            }
                        }
                    }
                    @Override
                    public void onError(Throwable t) {
                        iv.onFailed(new Exception(t));
                    }
                    @Override
                    public void onComplete() {

                    }
                });
    }
}

View层时通过一个接口将数据传值主界面的：

package view;

/**
 * Created by ZhangTAO on 2017/12/6.
 */

public interface IView {
    void onSuccess(Object o);
    void onFailed(Exception e);
}

接下来就是主界面了：

package zhangtao.bwie.com.reretrofitmvpdemo;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.TextView;

import java.util.HashMap;
import java.util.List;

import Bean.News;
import presenter.NewsPresenter;
import view.IView;

public class MainActivity extends AppCompatActivity implements IView{

    private NewsPresenter newsPresenter;
    private TextView textView;
    private List<News> news;
    private Handler ler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            for(int i=0;i<news.size();i++) {
                String title = news.get(i).getSubTitle();
                textView.setText(title);
            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        HashMap<String, String> map = new HashMap<>();
        map.put("channelId","0");
        map.put("startNum","0");
        newsPresenter = new NewsPresenter();
        newsPresenter.attachView(this);
        newsPresenter.getData(map);
        textView = (TextView) findViewById(R.id.text1);
    }

    @Override
    public void onSuccess(Object o) {
        if(o instanceof  List) {
            news = (List<News>) o;
            Log.d("zzz","传递"+news.size());
            ler.sendMessage(new Message());
        }
    }
    @Override
    public void onFailed(Exception e) {
        Log.d("zzz", "onFailed: " + e.getMessage());
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(newsPresenter != null) {
            newsPresenter.detachView();
        }
    }
}