RxJava+okhttp3

//Recycleview依赖
    implementation 'com.android.support:recyclerview-v7:26.1.0'
    //拦截器的依赖
    compile 'com.squareup.okhttp3:logging-interceptor:3.8.0'
    //SimpleDraweeView加载图片的依赖：
    compile 'com.facebook.fresco:fresco:1.5.0'
    //Banner的依赖:
    compile 'com.youth.banner:banner:1.4.10'
   // Fresco依赖:
    compile 'com.facebook.fresco:fresco:1.5.0'
    //Eventbus依赖:
    compile 'org.greenrobot:eventbus:3.1.1'
   // Rxjava2:
    compile 'io.reactivex.rxjava2:rxjava:2.1.7'
    compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'

    //Okhttp依赖
    compile 'com.squareup.okhttp3:okhttp:3.9.1'

    //retrofit依赖
    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    //GSON依赖
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
    //底部按钮
    compile 'com.hjm:BottomTabBar:1.1.1'
    //刷新页面
    compile 'com.scwang.smartrefresh:SmartRefreshLayout:1.0.4-4'

RetrofitHelper

public class RetrofitHelper {
    private static OkHttpClient client;
    private static ServiceApi api;
    static {
        initOkHttp();
    }

    private static void initOkHttp() {
        if (client == null) {
            synchronized (OkHttpClient.class) {
                if (client == null) {
                    client = new OkHttpClient.Builder().build();
                }
            }
        }
    }

    public static ServiceApi getApi() {
        if (api == null) {
            synchronized (ServiceApi.class) {
                if (api == null) {
                    api = RetrofitHelper.create(ServiceApi.class, UrlUtils.BASE_URL);
                }
            }
        }
        return api;
    }

    private static <T> T create(Class<T> tClass, String baseUrl) {
        Retrofit re = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build();
        return re.create(tClass);
    }
}

　　

OnListiner

public interface OnListiner<T> {
    public void onSuccess(T t);
    public void onFailure(Throwable throwable);

}

　　

UrlUtils

public class UrlUtils {

    public static final String BASE_URL="https://www.zhaoapi.cn/";
    public static final String HEAD_PATH="ad/getAd";
    public static final String HEAD_FEN="product/getCatagory";
    public static final String SUBCLASS="product/getProductCatagory";

}

　　

ServiceApi

public interface ServiceApi {
   //首页请求
   @GET(UrlUtils.HEAD_PATH)
   public Flowable<HeadBean> getHeads();
   //分类请求
   @GET(UrlUtils.HEAD_FEN)
   public Flowable<ClassifyBean> getClassify();
   //子分类请求
   @GET(UrlUtils.SUBCLASS)
   public Flowable<SubClass> getSubClass(@Query("cid") String cid);


}

　　M

public class HeadModel implements IHeadModel {
    @Override
    public void getDatas(final OnListiner onListiner) {
        ServiceApi api = RetrofitHelper.getApi();
        Flowable<HeadBean> getAd = api.getHeads();
        getAd.doOnSubscribe(new Consumer<Subscription>() {
            @Override
            public void accept(Subscription subscription) throws Exception {
                Log.i("hhhhhhhhhhhhhhhhhhh","开始请求数据");
            }
        })
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(new Consumer<HeadBean>() {
            @Override
            public void accept(HeadBean headBean) throws Exception {
                onListiner.onSuccess(headBean);
            }
        });
    }

}

　

public interface IClassifyModel<T> {
    public void getClassifyDatas(OnListiner<T> onListiner);
}

　　

　P

public class HeadPresenter {
    private IHeadFragment iHeadFragment;
    private IHeadModel iHeadModel;

    public HeadPresenter(IHeadFragment iHeadFragment) {
        this.iHeadFragment = iHeadFragment;
        iHeadModel = new HeadModel();
    }
    public void getHeadDatas()
    {
        iHeadModel.getDatas(new OnListiner() {
            @Override
            public void onSuccess(Object o) {
                iHeadFragment.getDatas((HeadBean) o);
            }

            @Override
            public void onFailure(Throwable throwable) {

            }
        });
    }
}

　　V

public interface IHeadFragment {
    public void getDatas(HeadBean headBean);
}

　　

public class Fragment01 extends Fragment implements IHeadFragment {
    private HeadPresenter presenter;
    private Banner banner;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment01,container,false);
        banner = view.findViewById(R.id.banner);
        presenter = new HeadPresenter(this);
        presenter.getHeadDatas();
        return view;
    }

    @Override
    public void getDatas(HeadBean headBean) {
        Toast.makeText(getActivity(),headBean.getCode(),Toast.LENGTH_SHORT).show();
        List<String> images = new ArrayList<>();
        List<HeadBean.DataBean> data = headBean.getData();
        for (int i = 0;i<data.size();i++)
        {
            images.add(data.get(i).getIcon()) ;
        }
        banner.setImageLoader(new GlideImageLoader());
        banner.isAutoPlay(true);

//设置轮播的时间间隔
        banner.setDelayTime(3000);
        banner.setImages(images);
        banner.start();
    }
}

　　适配器

public class HeadClassify extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private Context context;
    private List<ClassifyBean.DataBean> list;
    private LayoutInflater inflater;

    public HeadClassify(Context context, List<ClassifyBean.DataBean> list) {
        this.context = context;
        this.list = list;
        inflater =LayoutInflater.from(context);
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = inflater.inflate(R.layout.head_fenlei_item, parent, false);
        return new MyViewHolder(view);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        MyViewHolder holder1 = (MyViewHolder) holder;
        ClassifyBean.DataBean dataBean = list.get(position);
        Uri parse = Uri.parse(dataBean.getIcon());
        holder1.img.setImageURI(parse);
        holder1.txt.setText(dataBean.getName());
    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    class MyViewHolder extends RecyclerView.ViewHolder{
        private SimpleDraweeView img;
        private TextView txt;
        public MyViewHolder(View itemView) {
            super(itemView);
           img = itemView.findViewById(R.id.fenlei_img);
           txt = itemView.findViewById(R.id.fenlei_txt);
        }
    }
}

　　

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff"
    >
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true"
        >
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            >
            <com.youth.banner.Banner
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:id="@+id/banner"
                ></com.youth.banner.Banner>

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="200px"
                android:background="@mipmap/jd_huo_dong"
                android:id="@+id/jd"
                android:layout_margin="10dp"
                />
        </LinearLayout>

    </ScrollView>

</LinearLayout>