Retrofilt+RXjava

<uses-permission android:name="android.permission.INTERNET"></uses-permission>
android {
    compileSdkVersion 25
    buildToolsVersion "26.0.1"
    defaultConfig {
        applicationId "com.bawei.retrofitandjavastudy"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        jackOptions {
            enabled true
        }

    }
    compileOptions{
        //设置JDK1.8
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
    compile 'com.squareup.retrofit2:retrofit:2.0.1'
    compile 'com.squareup.retrofit2:converter-gson:2.0.1'
    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.1'
    compile 'io.reactivex:rxandroid:1.1.0'
    compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
    compile 'com.android.support:recyclerview-v7:25.3.1'
    compile 'com.github.bumptech.glide:glide:3.7.0'
    compile files('libs/universal-image-loader-1.9.5.jar')
    compile files('libs/universal-image-loader-1.9.3-with-sources.jar')
}


<android.support.v7.widget.RecyclerView    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:id="@+id/re"    ></android.support.v7.widget.RecyclerView>

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@mipmap/ic_launcher"
    android:id="@+id/img"
    />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/tv"
    android:text="aaaa"
    />
public class Api {
    public static  final  String BASE_PATH = "http://m.yunifang.com/";
}

public interface ApiService {
    /**
     * 结合Retrofit+RxJava
     * http://service.meiyinkeqiu.com/service/ads/cptj
     * @param
     * @return
     */
    @GET("yunifang/mobile/home")
    rx.Observable<News> getNoParams();


}
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{
    private Context context;
    private List<News.DataBean.DefaultGoodsListBean> list;
    private final ImageLoader loader;

    public MyAdapter(Context context, List<News.DataBean.DefaultGoodsListBean> list) {
        this.context = context;
        this.list = list;
        ImageLoaderConfiguration configuration=ImageLoaderConfiguration.createDefault(context);
        loader = ImageLoader.getInstance();
        loader.init(configuration);
    }

    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.item, parent, false);
        return new ViewHolder(view);
    }



    @Override
    public void onBindViewHolder(MyAdapter.ViewHolder holder, int position) {
        holder.name.setText(list.get(position).goods_name);
        loader.displayImage(list.get(position).goods_img,holder.img);
    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    public class ViewHolder extends RecyclerView.ViewHolder{
        public TextView name;
        public ImageView img;
        public ViewHolder(View itemView) {
            super(itemView);
            name= (TextView) itemView.findViewById(R.id.tv);
            img= (ImageView) itemView.findViewById(R.id.img);
        }
    }

}
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.widget.Toast;

import com.bawei.retrofitandjavastudy.api.Api;

import java.util.List;

import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
import rx.Observable;
import rx.Observer;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;

public class MainActivity extends AppCompatActivity {

    private ApiService apiService;
    private RecyclerView re;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        re = (RecyclerView) findViewById(R.id.re);
        LinearLayoutManager linearLayoutManager=new LinearLayoutManager(MainActivity.this);
        re.setLayoutManager(linearLayoutManager);

        getNoParams();
    }
    private void getNoParams() {
        //创建Retrofit
        Retrofit retrofit = new Retrofit.Builder().baseUrl(Api.BASE_PATH).addConverterFactory(GsonConverterFactory.create()).addCallAdapterFactory(RxJavaCallAdapterFactory.create()).build();
        //通过动态代理得到网络接口对象
        //http://service.meiyinkeqiu.com/service/ads/cptj
        //"http://service.meiyinkeqiu.com/service/"
        //  retrofit.create(ApiServices);
        apiService = retrofit.create(ApiService.class);

        //得到Observable
        Observable<News> observable = apiService.getNoParams();//获取数据源
        Subscription subscribe = observable.subscribeOn(Schedulers.io())//IO线程做耗时操作
                .observeOn(AndroidSchedulers.mainThread())//在主线程更新UI
                .subscribe(new Observer<News>() {
                    //完成
                    @Override
                    public void onCompleted() {
                        Toast.makeText(MainActivity.this, "onCompleted", Toast.LENGTH_LONG).show();
                        Log.d("MainActivity", "onCompleted: ");
                    }

                    //异常
                    @Override
                    public void onError(Throwable e) {
                        Log.d("MainActivity", "onError: " + e.getMessage());
                    }

                    // 加载中
                    @Override
                    public void onNext(News news) {
                       // Log.d("MainActivity", "onNext: ");
                        List<News.DataBean.DefaultGoodsListBean> ads = news.data.defaultGoodsList;
                      //  for (int i = 0; i < ads.size(); i++) {

                           // Log.i("xxx", ads.get(i).efficacy);
                         //   mtv.setText(ads.get(i).efficacy);
                       // }
                        MyAdapter adapter=new MyAdapter(MainActivity.this,ads);
                        re.setAdapter(adapter);
                    }
                });
    }
}

自己添加一个Bean类就好了