Retrofit请求方式

//首先就是要导包

compile 'com.squareup.retrofit2:retrofit:2.3.0'

//RetrofitHelper

package com.example.xzhaogao01.netWork;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

/**
 * Created by 绅丶士 on 2017/12/2.
 */

public class RetrofitHelper {
    private static OkHttpClient okHttpClient;
    private static ServiceAPL serviceAPL;
    static {
        ininOkHttpClient();
    }
    private static void ininOkHttpClient(){
        if(okHttpClient==null){
            synchronized (RetrofitHelper.class){
                if(okHttpClient==null){
                    okHttpClient=new OkHttpClient.Builder().build();
                }
            }
        }
    }

    public static ServiceAPL getAPI(){
        if(serviceAPL==null){
            synchronized (ServiceAPL.class){
                if(serviceAPL==null){
                    serviceAPL=RetrofitHelper.createAPI(ServiceAPL.class,UrlUtils.BASE_HOST_URL);
                }
            }
        }
        return  serviceAPL;
    }

    /**
     *
     * @param clazz
     * @param url
     * @param <T>
     * @return
     */
    public static <T> T createAPI(Class<T> clazz,String url){
        Retrofit retrofit=new Retrofit.Builder().baseUrl(UrlUtils.BASE_HOST_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        return retrofit.create(clazz);
    }
}
//ServiceAPL
public interface ServiceAPL {
    @GET(UrlUtils.TAGS)
    Call<UserBean> tabs();
}

UrlUtils
public class UrlUtils {
    public static final String BASE_HOST_URL = "http://gank.io/api/";
    public static final String TAGS = "data/Android/10/1";

}
//调用
public class ShowYeFr extends Fragment{
    UserDao userDao;
    private RecyclerView lv;


    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.fr_item01,container,false);
        lv = view.findViewById(R.id.Rlv);
        //设置布局管理器
        lv.setLayoutManager(new LinearLayoutManager(getContext()));
        //判断网络是否连接
        IFWork ifWork = new IFWork();
        //添加分割线
        //lv.addItemDecoration(new RecycleViewDivider(getContext(), LinearLayoutManager.HORIZONTAL,5,getResources().getColor(R.color.colorPrimary)));
        //判断网络

        //动态代理
        ServiceAPL api= RetrofitHelper.getAPI();
        Call<UserBean> tags=api.tabs();
        tags.enqueue(new Callback<UserBean>() {
            @Override
            public void onResponse(Call<UserBean> call, Response<UserBean> response) {
                UserBean body = response.body();
                List<UserBean.ResultsBean> results = body.getResults();
                for (UserBean.ResultsBean r:
                    results ) {
                    userDao.insert(new User(System.currentTimeMillis(),r.getCreatedAt(),r.getDesc()));
                }
                //创建适配器
                Myadap myadap = new Myadap(getActivity(), results);
                lv.setAdapter(myadap);
            }

            @Override
            public void onFailure(Call<UserBean> call, Throwable t) {

            }
        });
        //初始化数据库
        initDbHelp();
        return view;
    }
    private void initDbHelp(){
        DaoMaster.DevOpenHelper devOpenHelper = new DaoMaster.DevOpenHelper(getActivity(), "recluse-db", null);
        SQLiteDatabase db = devOpenHelper.getWritableDatabase();
        DaoMaster daoMaster = new DaoMaster(db);
        DaoSession daoSession = daoMaster.newSession();
        userDao=daoSession.getUserDao();
    }
}