使用Retrofit和Rxjava让你的网络请求更简单

去年的时候好多公司就已经使用Rxjava和Retrofit了，最近自自己学习了一下，感觉真的是很好用，让自己的网络请求变得更简单了，而且封装性极强。
首先做一下准备工作，导入需要引用的文件

compile 'com.android.support:appcompat-v7:25.1.0'
    testCompile 'junit:junit:4.12'
    compile 'io.reactivex:rxjava:1.1.0'
    compile 'io.reactivex:rxandroid:1.1.0'
    compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'
    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'
    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'
    compile 'com.google.code.gson:gson:2.6.2'
    compile 'com.jakewharton:butterknife:7.0.1'
    compile 'com.android.support:recyclerview-v7:25.1.0'

网络请求的地址：https://api.douban.com/v2/movie/top250?start=0&count=10
添加网络请求权限

<uses-permission android:name="android.permission.INTERNET"/>

首先看一下Retrofit的使用基本用法

1. 创建一个接口类MovieService 对网络接口进行请求这里写代码片
2. 构建网络请求

public interface MovieService {
    @GET("top250")
    Call getTopMovie(@Query("start")int start, @Query("count")int count);
}

String baseUrl="https://api.douban.com/v2/movie/";
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
               .build();
        MovieService service = retrofit.create(MovieService.class);
        service.getTopMovie(0,10)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber() {
                    @Override
                    public void onCompleted() {
                        Toast.makeText(MainActivity.this, "Get Top Movie Completed", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onError(Throwable e) {
                        resultTV.setText(e.getMessage());
                    }

                    @Override
                    public void onNext(MovieBean movieBean) {
                        resultTV.setText(movieBean.getTitle());
                    }
                });
        Call call = service.getTopMovie(0, 10);
       call.enqueue(new Callback() {
            @Override
            public void onResponse(Call call, Response response) {
                MovieBean body = response.body();
                resultTV.setText(response.body().getTitle());
                System.out.println("成功"+response.body().getCount());
            }

            @Override
            public void onFailure(Call call, Throwable t) {
                resultTV.setText(t.getMessage());
            }
        });

现在看看我们的布局文件MainActivity的xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="ledon.com.retrofitdemo.MainActivity">

    <Button
        android:id="@+id/click_me_BN"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:padding="5dp"
        android:text="获取数据"
        android:textSize="16sp"/>
    <ListView
        android:id="@+id/result_TV"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/click_me_BN"
        android:textSize="16sp"/>
RelativeLayout>

接下来就看看怎么样和RxJava的完美结合了。
首先改造一下MovieService这个接口

public interface MovieService {
    @GET("top250")
    Observable getTopMovie(@Query("start")int start, @Query("count")int count);
}

然后看一下我们需要创建一个HttpMethods关于一个http的请求方法

package ledon.com.retrofitdemo.api;

import java.util.List;
import java.util.concurrent.TimeUnit;

import javax.security.auth.Subject;

import ledon.com.retrofitdemo.MovieBean;
import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
import rx.Subscriber;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Func1;
import rx.schedulers.Schedulers;

/**
 * Created by Administrator on 2017/3/9.
 */

public class HttpMethods {
    public static final String BASE_URL="https://api.douban.com/v2/movie/";
    private static final int DEFAULT_TIMEOUT=5;
    private Retrofit retrofit;
    private MovieService movieService;
    //私有化构造方法
    private HttpMethods(){
        //手动创建一个okhttpClient并设置超时时间
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS);
        retrofit=new Retrofit.Builder()
                .client(builder.build())
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .baseUrl(BASE_URL)
                .build();
        movieService = retrofit.create(MovieService.class);


    }
    //在访问httpmethods时候创建单例
    private static class SingletonHolder{
        private static final HttpMethods INSTANCE=new HttpMethods();
    }
     //获取单例
    public static HttpMethods getInstance(){
        return SingletonHolder.INSTANCE;
    }
    public void getTopMovie(Subscribersubscriber, int start, int count){
       movieService.getTopMovie(start, count)
                .subscribeOn(Schedulers.io())
                .unsubscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(subscriber);

    }

}

so，很简单，我们的结合之路已经完成，另附源代码

package ledon.com.retrofitdemo;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Toast;

import java.util.List;

import butterknife.Bind;
import butterknife.ButterKnife;
import butterknife.OnClick;
import ledon.com.retrofitdemo.adapter.MovieAdapter;
import ledon.com.retrofitdemo.api.HttpMethods;
import rx.Subscriber;

public class MainActivity extends AppCompatActivity {



    @Bind(R.id.click_me_BN)
    Button clickMeBN;
    @Bind(R.id.result_TV)
    ListView resultTV;
    @Bind(R.id.activity_main)
    RelativeLayout activityMain;
    private Subscriber subscriber;
    private List list;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

        //resultTV.setAdapter();

    }


    //进行网络请求
    private void getMovie() {
        subscriber = new Subscriber() {
            @Override
            public void onCompleted() {
                Toast.makeText(MainActivity.this, "Get Top Movie Completed", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onError(Throwable e) {
                //resultTV.setText(e.getMessage());
            }

            @Override
            public void onNext(MovieBean movieBean) {
               // List subjects = movieBean.getSubjects();
                list=movieBean.getSubjects();
                MovieAdapter movieAdapter=new MovieAdapter(MainActivity.this,list);
                resultTV.setAdapter(movieAdapter);
                //resultTV.setText(movieBean.getTitle());
            }
        };
        HttpMethods.getInstance().getTopMovie(subscriber, 0, 10);
       /* String baseUrl="https://api.douban.com/v2/movie/";
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
               .build();
        MovieService service = retrofit.create(MovieService.class);
        service.getTopMovie(0,10)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber() {
                    @Override
                    public void onCompleted() {
                        Toast.makeText(MainActivity.this, "Get Top Movie Completed", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onError(Throwable e) {
                        resultTV.setText(e.getMessage());
                    }

                    @Override
                    public void onNext(MovieBean movieBean) {
                        resultTV.setText(movieBean.getTitle());
                    }
                });*/
        //Call call = service.getTopMovie(0, 10);
       /* call.enqueue(new Callback() {
            @Override
            public void onResponse(Call call, Response response) {
                MovieBean body = response.body();
                resultTV.setText(response.body().getTitle());
                System.out.println("成功"+response.body().getCount());
            }

            @Override
            public void onFailure(Call call, Throwable t) {
                resultTV.setText(t.getMessage());
            }
        });*/
    }

    @OnClick(R.id.click_me_BN)
    public void onClick() {
        getMovie();
    }

}

package ledon.com.retrofitdemo;

import java.util.List;

/**
 * Created by Administrator on 2017/3/9.
 */

public class MovieBean {

    /**
     * count : 10
     * start : 0
     * total : 250
     * subjects : [{"rating":{"max":10,"average":9.6,"stars":"50","min":0},"genres":["犯罪","剧情"],"title":"肖申克的救赎","casts":[{"alt":"https://movie.douban.com/celebrity/1054521/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/17525.jpg","large":"https://img3.doubanio.com/img/celebrity/large/17525.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/17525.jpg"},"name":"蒂姆·罗宾斯","id":"1054521"},{"alt":"https://movie.douban.com/celebrity/1054534/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/34642.jpg","large":"https://img3.doubanio.com/img/celebrity/large/34642.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/34642.jpg"},"name":"摩根·弗里曼","id":"1054534"},{"alt":"https://movie.douban.com/celebrity/1041179/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/5837.jpg","large":"https://img1.doubanio.com/img/celebrity/large/5837.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/5837.jpg"},"name":"鲍勃·冈顿","id":"1041179"}],"collect_count":1036030,"original_title":"The Shawshank Redemption","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1047973/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/230.jpg","large":"https://img3.doubanio.com/img/celebrity/large/230.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/230.jpg"},"name":"弗兰克·德拉邦特","id":"1047973"}],"year":"1994","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p480747492.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p480747492.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p480747492.jpg"},"alt":"https://movie.douban.com/subject/1292052/","id":"1292052"},{"rating":{"max":10,"average":9.4,"stars":"50","min":0},"genres":["剧情","动作","犯罪"],"title":"这个杀手不太冷","casts":[{"alt":"https://movie.douban.com/celebrity/1025182/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/8833.jpg","large":"https://img3.doubanio.com/img/celebrity/large/8833.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/8833.jpg"},"name":"让·雷诺","id":"1025182"},{"alt":"https://movie.douban.com/celebrity/1054454/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/2274.jpg","large":"https://img3.doubanio.com/img/celebrity/large/2274.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/2274.jpg"},"name":"娜塔莉·波特曼","id":"1054454"},{"alt":"https://movie.douban.com/celebrity/1010507/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/104.jpg","large":"https://img3.doubanio.com/img/celebrity/large/104.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/104.jpg"},"name":"加里·奥德曼","id":"1010507"}],"collect_count":1002125,"original_title":"Léon","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1031876/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/33301.jpg","large":"https://img3.doubanio.com/img/celebrity/large/33301.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/33301.jpg"},"name":"吕克·贝松","id":"1031876"}],"year":"1994","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p511118051.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p511118051.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p511118051.jpg"},"alt":"https://movie.douban.com/subject/1295644/","id":"1295644"},{"rating":{"max":10,"average":9.5,"stars":"50","min":0},"genres":["剧情","爱情","同性"],"title":"霸王别姬","casts":[{"alt":"https://movie.douban.com/celebrity/1003494/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/67.jpg","large":"https://img1.doubanio.com/img/celebrity/large/67.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/67.jpg"},"name":"张国荣","id":"1003494"},{"alt":"https://movie.douban.com/celebrity/1050265/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/10381.jpg","large":"https://img3.doubanio.com/img/celebrity/large/10381.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/10381.jpg"},"name":"张丰毅","id":"1050265"},{"alt":"https://movie.douban.com/celebrity/1035641/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/1399268395.47.jpg","large":"https://img1.doubanio.com/img/celebrity/large/1399268395.47.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/1399268395.47.jpg"},"name":"巩俐","id":"1035641"}],"collect_count":727900,"original_title":"霸王别姬","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1023040/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/750.jpg","large":"https://img3.doubanio.com/img/celebrity/large/750.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/750.jpg"},"name":"陈凯歌","id":"1023040"}],"year":"1993","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p1910813120.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p1910813120.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p1910813120.jpg"},"alt":"https://movie.douban.com/subject/1291546/","id":"1291546"},{"rating":{"max":10,"average":9.4,"stars":"50","min":0},"genres":["剧情","爱情"],"title":"阿甘正传","casts":[{"alt":"https://movie.douban.com/celebrity/1054450/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/551.jpg","large":"https://img3.doubanio.com/img/celebrity/large/551.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/551.jpg"},"name":"汤姆·汉克斯","id":"1054450"},{"alt":"https://movie.douban.com/celebrity/1002676/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/51737.jpg","large":"https://img1.doubanio.com/img/celebrity/large/51737.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/51737.jpg"},"name":"罗宾·怀特","id":"1002676"},{"alt":"https://movie.douban.com/celebrity/1031848/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/1345.jpg","large":"https://img3.doubanio.com/img/celebrity/large/1345.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/1345.jpg"},"name":"加里·西尼斯","id":"1031848"}],"collect_count":895393,"original_title":"Forrest Gump","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1053564/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/505.jpg","large":"https://img3.doubanio.com/img/celebrity/large/505.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/505.jpg"},"name":"罗伯特·泽米吉斯","id":"1053564"}],"year":"1994","images":{"small":"https://img1.doubanio.com/view/movie_poster_cover/ipst/public/p510876377.jpg","large":"https://img1.doubanio.com/view/movie_poster_cover/lpst/public/p510876377.jpg","medium":"https://img1.doubanio.com/view/movie_poster_cover/spst/public/p510876377.jpg"},"alt":"https://movie.douban.com/subject/1292720/","id":"1292720"},{"rating":{"max":10,"average":9.5,"stars":"50","min":0},"genres":["剧情","喜剧","爱情"],"title":"美丽人生","casts":[{"alt":"https://movie.douban.com/celebrity/1041004/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/26764.jpg","large":"https://img3.doubanio.com/img/celebrity/large/26764.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/26764.jpg"},"name":"罗伯托·贝尼尼","id":"1041004"},{"alt":"https://movie.douban.com/celebrity/1000375/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/9548.jpg","large":"https://img1.doubanio.com/img/celebrity/large/9548.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/9548.jpg"},"name":"尼可莱塔·布拉斯基","id":"1000375"},{"alt":"https://movie.douban.com/celebrity/1000368/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/45590.jpg","large":"https://img3.doubanio.com/img/celebrity/large/45590.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/45590.jpg"},"name":"乔治·坎塔里尼","id":"1000368"}],"collect_count":493063,"original_title":"La vita è bella","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1041004/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/26764.jpg","large":"https://img3.doubanio.com/img/celebrity/large/26764.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/26764.jpg"},"name":"罗伯托·贝尼尼","id":"1041004"}],"year":"1997","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p510861873.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p510861873.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p510861873.jpg"},"alt":"https://movie.douban.com/subject/1292063/","id":"1292063"},{"rating":{"max":10,"average":9.2,"stars":"50","min":0},"genres":["剧情","动画","奇幻"],"title":"千与千寻","casts":[{"alt":"https://movie.douban.com/celebrity/1023337/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/1463193210.13.jpg","large":"https://img3.doubanio.com/img/celebrity/large/1463193210.13.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/1463193210.13.jpg"},"name":"柊瑠美","id":"1023337"},{"alt":"https://movie.douban.com/celebrity/1005438/","avatars":{"small":"https://img5.doubanio.com/img/celebrity/small/44986.jpg","large":"https://img5.doubanio.com/img/celebrity/large/44986.jpg","medium":"https://img5.doubanio.com/img/celebrity/medium/44986.jpg"},"name":"入野自由","id":"1005438"},{"alt":"https://movie.douban.com/celebrity/1045797/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/18785.jpg","large":"https://img3.doubanio.com/img/celebrity/large/18785.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/18785.jpg"},"name":"夏木真理","id":"1045797"}],"collect_count":801778,"original_title":"千と千尋の神隠し","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1054439/","avatars":{"small":"https://img5.doubanio.com/img/celebrity/small/616.jpg","large":"https://img5.doubanio.com/img/celebrity/large/616.jpg","medium":"https://img5.doubanio.com/img/celebrity/medium/616.jpg"},"name":"宫崎骏","id":"1054439"}],"year":"2001","images":{"small":"https://img5.doubanio.com/view/movie_poster_cover/ipst/public/p1910830216.jpg","large":"https://img5.doubanio.com/view/movie_poster_cover/lpst/public/p1910830216.jpg","medium":"https://img5.doubanio.com/view/movie_poster_cover/spst/public/p1910830216.jpg"},"alt":"https://movie.douban.com/subject/1291561/","id":"1291561"},{"rating":{"max":10,"average":9.4,"stars":"50","min":0},"genres":["剧情","历史","战争"],"title":"辛德勒的名单","casts":[{"alt":"https://movie.douban.com/celebrity/1031220/","avatars":{"small":"https://img5.doubanio.com/img/celebrity/small/44906.jpg","large":"https://img5.doubanio.com/img/celebrity/large/44906.jpg","medium":"https://img5.doubanio.com/img/celebrity/medium/44906.jpg"},"name":"连姆·尼森","id":"1031220"},{"alt":"https://movie.douban.com/celebrity/1054393/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/1374649659.58.jpg","large":"https://img1.doubanio.com/img/celebrity/large/1374649659.58.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/1374649659.58.jpg"},"name":"本·金斯利","id":"1054393"},{"alt":"https://movie.douban.com/celebrity/1006956/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/28941.jpg","large":"https://img3.doubanio.com/img/celebrity/large/28941.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/28941.jpg"},"name":"拉尔夫·费因斯","id":"1006956"}],"collect_count":472445,"original_title":"Schindler's List","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1054440/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/34602.jpg","large":"https://img3.doubanio.com/img/celebrity/large/34602.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/34602.jpg"},"name":"史蒂文·斯皮尔伯格","id":"1054440"}],"year":"1993","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p492406163.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p492406163.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p492406163.jpg"},"alt":"https://movie.douban.com/subject/1295124/","id":"1295124"},{"rating":{"max":10,"average":9.2,"stars":"45","min":0},"genres":["剧情","爱情","灾难"],"title":"泰坦尼克号","casts":[{"alt":"https://movie.douban.com/celebrity/1041029/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/470.jpg","large":"https://img3.doubanio.com/img/celebrity/large/470.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/470.jpg"},"name":"莱昂纳多·迪卡普里奥","id":"1041029"},{"alt":"https://movie.douban.com/celebrity/1054446/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/53358.jpg","large":"https://img1.doubanio.com/img/celebrity/large/53358.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/53358.jpg"},"name":"凯特·温丝莱特","id":"1054446"},{"alt":"https://movie.douban.com/celebrity/1031864/","avatars":{"small":"https://img5.doubanio.com/img/celebrity/small/45186.jpg","large":"https://img5.doubanio.com/img/celebrity/large/45186.jpg","medium":"https://img5.doubanio.com/img/celebrity/medium/45186.jpg"},"name":"比利·赞恩","id":"1031864"}],"collect_count":823041,"original_title":"Titanic","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1022571/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/33715.jpg","large":"https://img3.doubanio.com/img/celebrity/large/33715.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/33715.jpg"},"name":"詹姆斯·卡梅隆","id":"1022571"}],"year":"1997","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p457760035.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p457760035.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p457760035.jpg"},"alt":"https://movie.douban.com/subject/1292722/","id":"1292722"},{"rating":{"max":10,"average":9.2,"stars":"50","min":0},"genres":["剧情","动作","科幻"],"title":"盗梦空间","casts":[{"alt":"https://movie.douban.com/celebrity/1041029/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/470.jpg","large":"https://img3.doubanio.com/img/celebrity/large/470.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/470.jpg"},"name":"莱昂纳多·迪卡普里奥","id":"1041029"},{"alt":"https://movie.douban.com/celebrity/1101703/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/3517.jpg","large":"https://img1.doubanio.com/img/celebrity/large/3517.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/3517.jpg"},"name":"约瑟夫·高登-莱维特","id":"1101703"},{"alt":"https://movie.douban.com/celebrity/1012520/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/118.jpg","large":"https://img1.doubanio.com/img/celebrity/large/118.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/118.jpg"},"name":"艾伦·佩吉","id":"1012520"}],"collect_count":903330,"original_title":"Inception","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1054524/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/673.jpg","large":"https://img3.doubanio.com/img/celebrity/large/673.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/673.jpg"},"name":"克里斯托弗·诺兰","id":"1054524"}],"year":"2010","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p513344864.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p513344864.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p513344864.jpg"},"alt":"https://movie.douban.com/subject/3541415/","id":"3541415"},{"rating":{"max":10,"average":9.3,"stars":"50","min":0},"genres":["喜剧","爱情","科幻"],"title":"机器人总动员","casts":[{"alt":"https://movie.douban.com/celebrity/1009535/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/13028.jpg","large":"https://img1.doubanio.com/img/celebrity/large/13028.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/13028.jpg"},"name":"本·贝尔特","id":"1009535"},{"alt":"https://movie.douban.com/celebrity/1000389/","avatars":{"small":"https://img5.doubanio.com/img/celebrity/small/1365856130.16.jpg","large":"https://img5.doubanio.com/img/celebrity/large/1365856130.16.jpg","medium":"https://img5.doubanio.com/img/celebrity/medium/1365856130.16.jpg"},"name":"艾丽莎·奈特","id":"1000389"},{"alt":"https://movie.douban.com/celebrity/1018022/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/31068.jpg","large":"https://img1.doubanio.com/img/celebrity/large/31068.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/31068.jpg"},"name":"杰夫·格尔林","id":"1018022"}],"collect_count":586255,"original_title":"WALL·E","subtype":"movie","directors":[{"alt":"https://movie.douban.com/celebrity/1036450/","avatars":{"small":"https://img5.doubanio.com/img/celebrity/small/1467359656.96.jpg","large":"https://img5.doubanio.com/img/celebrity/large/1467359656.96.jpg","medium":"https://img5.doubanio.com/img/celebrity/medium/1467359656.96.jpg"},"name":"安德鲁·斯坦顿","id":"1036450"}],"year":"2008","images":{"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p449665982.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p449665982.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p449665982.jpg"},"alt":"https://movie.douban.com/subject/2131459/","id":"2131459"}]
     * title : 豆瓣电影Top250
     */

    private int count;
    private int start;
    private int total;
    private String title;
    private List subjects;

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public int getStart() {
        return start;
    }

    public void setStart(int start) {
        this.start = start;
    }

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public List getSubjects() {
        return subjects;
    }

    public void setSubjects(List subjects) {
        this.subjects = subjects;
    }

    public static class SubjectsBean {
        /**
         * rating : {"max":10,"average":9.6,"starsmin":0}
         * genres : ["犯罪","剧情"]":"50","
         * title : 肖申克的救赎
         * casts : [{"alt":"https://movie.douban.com/celebrity/1054521/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/17525.jpg","large":"https://img3.doubanio.com/img/celebrity/large/17525.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/17525.jpg"},"name":"蒂姆·罗宾斯","id":"1054521"},{"alt":"https://movie.douban.com/celebrity/1054534/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/34642.jpg","large":"https://img3.doubanio.com/img/celebrity/large/34642.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/34642.jpg"},"name":"摩根·弗里曼","id":"1054534"},{"alt":"https://movie.douban.com/celebrity/1041179/","avatars":{"small":"https://img1.doubanio.com/img/celebrity/small/5837.jpg","large":"https://img1.doubanio.com/img/celebrity/large/5837.jpg","medium":"https://img1.doubanio.com/img/celebrity/medium/5837.jpg"},"name":"鲍勃·冈顿","id":"1041179"}]
         * collect_count : 1036030
         * original_title : The Shawshank Redemption
         * subtype : movie
         * directors : [{"alt":"https://movie.douban.com/celebrity/1047973/","avatars":{"small":"https://img3.doubanio.com/img/celebrity/small/230.jpg","large":"https://img3.doubanio.com/img/celebrity/large/230.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/230.jpg"},"name":"弗兰克·德拉邦特","id":"1047973"}]
         * year : 1994
         * images : {"small":"https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p480747492.jpg","large":"https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p480747492.jpg","medium":"https://img3.doubanio.com/view/movie_poster_cover/spst/public/p480747492.jpg"}
         * alt : https://movie.douban.com/subject/1292052/
         * id : 1292052
         */

        private RatingBean rating;
        private String title;
        private int collect_count;
        private String original_title;
        private String subtype;
        private String year;
        private ImagesBean images;
        private String alt;
        private String id;
        private List genres;
        private List casts;
        private List directors;

        public RatingBean getRating() {
            return rating;
        }

        public void setRating(RatingBean rating) {
            this.rating = rating;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public int getCollect_count() {
            return collect_count;
        }

        public void setCollect_count(int collect_count) {
            this.collect_count = collect_count;
        }

        public String getOriginal_title() {
            return original_title;
        }

        public void setOriginal_title(String original_title) {
            this.original_title = original_title;
        }

        public String getSubtype() {
            return subtype;
        }

        public void setSubtype(String subtype) {
            this.subtype = subtype;
        }

        public String getYear() {
            return year;
        }

        public void setYear(String year) {
            this.year = year;
        }

        public ImagesBean getImages() {
            return images;
        }

        public void setImages(ImagesBean images) {
            this.images = images;
        }

        public String getAlt() {
            return alt;
        }

        public void setAlt(String alt) {
            this.alt = alt;
        }

        public String getId() {
            return id;
        }

        public void setId(String id) {
            this.id = id;
        }

        public List getGenres() {
            return genres;
        }

        public void setGenres(List genres) {
            this.genres = genres;
        }

        public List getCasts() {
            return casts;
        }

        public void setCasts(List casts) {
            this.casts = casts;
        }

        public List getDirectors() {
            return directors;
        }

        public void setDirectors(List directors) {
            this.directors = directors;
        }

        public static class RatingBean {
            /**
             * max : 10
             * average : 9.6
             * stars : 50
             * min : 0
             */

            private int max;
            private double average;
            private String stars;
            private int min;

            public int getMax() {
                return max;
            }

            public void setMax(int max) {
                this.max = max;
            }

            public double getAverage() {
                return average;
            }

            public void setAverage(double average) {
                this.average = average;
            }

            public String getStars() {
                return stars;
            }

            public void setStars(String stars) {
                this.stars = stars;
            }

            public int getMin() {
                return min;
            }

            public void setMin(int min) {
                this.min = min;
            }
        }

        public static class ImagesBean {
            /**
             * small : https://img3.doubanio.com/view/movie_poster_cover/ipst/public/p480747492.jpg
             * large : https://img3.doubanio.com/view/movie_poster_cover/lpst/public/p480747492.jpg
             * medium : https://img3.doubanio.com/view/movie_poster_cover/spst/public/p480747492.jpg
             */

            private String small;
            private String large;
            private String medium;

            public String getSmall() {
                return small;
            }

            public void setSmall(String small) {
                this.small = small;
            }

            public String getLarge() {
                return large;
            }

            public void setLarge(String large) {
                this.large = large;
            }

            public String getMedium() {
                return medium;
            }

            public void setMedium(String medium) {
                this.medium = medium;
            }
        }

        public static class CastsBean {
            /**
             * alt : https://movie.douban.com/celebrity/1054521/
             * avatars : {"small":"https://img3.doubanio.com/img/celebrity/small/17525.jpg","large":"https://img3.doubanio.com/img/celebrity/large/17525.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/17525.jpg"}
             * name : 蒂姆·罗宾斯
             * id : 1054521
             */

            private String alt;
            private AvatarsBean avatars;
            private String name;
            private String id;

            public String getAlt() {
                return alt;
            }

            public void setAlt(String alt) {
                this.alt = alt;
            }

            public AvatarsBean getAvatars() {
                return avatars;
            }

            public void setAvatars(AvatarsBean avatars) {
                this.avatars = avatars;
            }

            public String getName() {
                return name;
            }

            public void setName(String name) {
                this.name = name;
            }

            public String getId() {
                return id;
            }

            public void setId(String id) {
                this.id = id;
            }

            public static class AvatarsBean {
                /**
                 * small : https://img3.doubanio.com/img/celebrity/small/17525.jpg
                 * large : https://img3.doubanio.com/img/celebrity/large/17525.jpg
                 * medium : https://img3.doubanio.com/img/celebrity/medium/17525.jpg
                 */

                private String small;
                private String large;
                private String medium;

                public String getSmall() {
                    return small;
                }

                public void setSmall(String small) {
                    this.small = small;
                }

                public String getLarge() {
                    return large;
                }

                public void setLarge(String large) {
                    this.large = large;
                }

                public String getMedium() {
                    return medium;
                }

                public void setMedium(String medium) {
                    this.medium = medium;
                }
            }
        }

        public static class DirectorsBean {
            /**
             * alt : https://movie.douban.com/celebrity/1047973/
             * avatars : {"small":"https://img3.doubanio.com/img/celebrity/small/230.jpg","large":"https://img3.doubanio.com/img/celebrity/large/230.jpg","medium":"https://img3.doubanio.com/img/celebrity/medium/230.jpg"}
             * name : 弗兰克·德拉邦特
             * id : 1047973
             */

            private String alt;
            private AvatarsBeanX avatars;
            private String name;
            private String id;

            public String getAlt() {
                return alt;
            }

            public void setAlt(String alt) {
                this.alt = alt;
            }

            public AvatarsBeanX getAvatars() {
                return avatars;
            }

            public void setAvatars(AvatarsBeanX avatars) {
                this.avatars = avatars;
            }

            public String getName() {
                return name;
            }

            public void setName(String name) {
                this.name = name;
            }

            public String getId() {
                return id;
            }

            public void setId(String id) {
                this.id = id;
            }

            public static class AvatarsBeanX {
                /**
                 * small : https://img3.doubanio.com/img/celebrity/small/230.jpg
                 * large : https://img3.doubanio.com/img/celebrity/large/230.jpg
                 * medium : https://img3.doubanio.com/img/celebrity/medium/230.jpg
                 */

                private String small;
                private String large;
                private String medium;

                public String getSmall() {
                    return small;
                }

                public void setSmall(String small) {
                    this.small = small;
                }

                public String getLarge() {
                    return large;
                }

                public void setLarge(String large) {
                    this.large = large;
                }

                public String getMedium() {
                    return medium;
                }

                public void setMedium(String medium) {
                    this.medium = medium;
                }
            }
        }
    }
}

package ledon.com.retrofitdemo.adapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import java.util.List;

import ledon.com.retrofitdemo.MovieBean;
import ledon.com.retrofitdemo.R;

/**
 * Created by Administrator on 2017/3/9.
 */

public class MovieAdapter extends BaseAdapter {
    private Context context;
    private List lists;

    public MovieAdapter(Context context, List lists) {
        this.context = context;
        this.lists = lists;
    }

    @Override
    public int getCount() {
        System.out.println("集合大小："+lists.size());
        return lists.size();
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int i, View convertView, ViewGroup viewGroup) {
        ViewHolder holder;
        if (convertView==null){
            convertView = LayoutInflater.from(context).inflate(R.layout.item, null);
            holder=new ViewHolder();
            holder.tv_title= (TextView) convertView.findViewById(R.id.tv_title);
            holder.tv_name= (TextView) convertView.findViewById(R.id.tv_name);
            convertView.setTag(holder);
        }else {
            holder= (ViewHolder) convertView.getTag();
        }



        //MovieBean.SubjectsBean subjectsBean = lists.get(i).getSubjects().get(i);

        holder.tv_title.setText(lists.get(i).getTitle());
//        holder.tv_name.setText(lists.get(i).getCasts().get(i).getName());
        return convertView;
    }
    static class ViewHolder{
        TextView tv_title;
        TextView tv_name;
    }
}

package ledon.com.retrofitdemo.api;

import java.util.List;
import java.util.concurrent.TimeUnit;

import javax.security.auth.Subject;

import ledon.com.retrofitdemo.MovieBean;
import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
import rx.Subscriber;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Func1;
import rx.schedulers.Schedulers;

/**
 * Created by Administrator on 2017/3/9.
 */

public class HttpMethods {
    public static final String BASE_URL="https://api.douban.com/v2/movie/";
    private static final int DEFAULT_TIMEOUT=5;
    private Retrofit retrofit;
    private MovieService movieService;
    //私有化构造方法
    private HttpMethods(){
        //手动创建一个okhttpClient并设置超时时间
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS);
        retrofit=new Retrofit.Builder()
                .client(builder.build())
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .baseUrl(BASE_URL)
                .build();
        movieService = retrofit.create(MovieService.class);


    }
    //在访问httpmethods时候创建单例
    private static class SingletonHolder{
        private static final HttpMethods INSTANCE=new HttpMethods();
    }
     //获取单例
    public static HttpMethods getInstance(){
        return SingletonHolder.INSTANCE;
    }
    public void getTopMovie(Subscribersubscriber, int start, int count){
       movieService.getTopMovie(start, count)
                .subscribeOn(Schedulers.io())
                .unsubscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(subscriber);
     /*   movieService.getTopMovie(start, count)
                .map(new HttpResultFunc>())
                .subscribeOn(Schedulers.io())
                .unsubscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(subscriber);*/
    }
    private class HttpResultFunc implements Func1,T>{

        @Override
        public T call(HttpResult httpResult) {

            return httpResult.getSubjects();
        }
    }
}

package ledon.com.retrofitdemo.api;

import ledon.com.retrofitdemo.MovieBean;
import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Query;
import rx.Observable;

/**
 * Created by Administrator on 2017/3/9.
 */

public interface MovieService {
    @GET("top250")
    Observable getTopMovie(@Query("start")int start, @Query("count")int count);
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <TextView
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv_title"
        android:textSize="20dp"
        android:text="这个杀手不太冷"/>

    <ImageView
        android:layout_gravity="center"
        android:id="@+id/iv"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher"/>
<TextView
    android:id="@+id/tv_name"
    android:layout_gravity="center"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="20dp"
    android:text="主演：呵呵哈哈哈"/>
LinearLayout>