implementation ‘com.lzy.net:okgo:2.1.4’//OKGO库
比较简单的调用如下:
public static void doRequestGetGiftCabinetList(String id, StringCallback callback) {

    OkGo.get(AppConfig.API_DOMAIN + "/user_api/request_get_gift_cabinet")
            .params("to_user_id", id)
            .tag("doRequestGetGiftCabinetList")
            .cacheMode(CacheMode.DEFAULT)
            .execute(callback);
}

以下是Retrofit的的用法,搭配rxjava使用：
@POST(“api/sso/login”)
@FormUrlEncoded
Observable phoneregister(@Field(“appid”) String appid);

以下是直接使用：
@GET("/reverse_geocoding/v3")
Call findLocation(@Query(“location”) String location, @Query(“ak”) String ak);

以下是RetrofitClient封装单例类, 实现网络请求，可以复制直接使用，在下面有配合rxjava使用的示例代码：

import android.content.Context;
import android.text.TextUtils;

import com.sim.chongwukongjing.BuildConfig;

import java.io.File;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;
import me.goldze.mvvmhabit.http.cookie.CookieJarImpl;
import me.goldze.mvvmhabit.http.cookie.store.PersistentCookieStore;
import me.goldze.mvvmhabit.http.interceptor.BaseInterceptor;
import me.goldze.mvvmhabit.http.interceptor.CacheInterceptor;
import me.goldze.mvvmhabit.http.interceptor.logging.Level;
import me.goldze.mvvmhabit.http.interceptor.logging.LoggingInterceptor;
import me.goldze.mvvmhabit.utils.KLog;
import me.goldze.mvvmhabit.utils.Utils;
import okhttp3.Cache;
import okhttp3.ConnectionPool;
import okhttp3.OkHttpClient;
import okhttp3.internal.platform.Platform;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;

/**
 *
 * @author goldze
 * @date 2017/5/10
 * RetrofitClient封装单例类, 实现网络请求
 */
public class RetrofitClient {
    //超时时间
    private static final int DEFAULT_TIMEOUT = 20;
    //缓存时间
    private static final int CACHE_TIMEOUT = 10 * 1024 * 1024;
    //服务端根路径
    public static String baseUrl = "http://smart.airmedic.cn:9088/arm/";

    private static Context mContext = Utils.getContext();

    private static OkHttpClient okHttpClient;
    private static Retrofit retrofit;

    private Cache cache = null;
    private File httpCacheDirectory;

    private static class SingletonHolder {
        private static RetrofitClient INSTANCE = new RetrofitClient();
    }

    public static RetrofitClient getInstance() {
        return SingletonHolder.INSTANCE;
    }

    private RetrofitClient() {
        this(baseUrl, null);
    }

    private RetrofitClient(String url, Map<String, String> headers) {

        if (TextUtils.isEmpty(url)) {
            url = baseUrl;
        }

        if (httpCacheDirectory == null) {
            httpCacheDirectory = new File(mContext.getCacheDir(), "goldze_cache");
        }

        try {
            if (cache == null) {
                cache = new Cache(httpCacheDirectory, CACHE_TIMEOUT);
            }
        } catch (Exception e) {
            KLog.e("Could not create http cache", e);
        }
        HttpsUtils.SSLParams sslParams = HttpsUtils.getSslSocketFactory();
        okHttpClient = new OkHttpClient.Builder()
                .cookieJar(new CookieJarImpl(new PersistentCookieStore(mContext)))
//                .cache(cache)
                .addInterceptor(new BaseInterceptor(headers))
                .addInterceptor(new CacheInterceptor(mContext))
                .sslSocketFactory(sslParams.sSLSocketFactory, sslParams.trustManager)
                .addInterceptor(new LoggingInterceptor
                        .Builder()//构建者模式
                        .loggable(BuildConfig.DEBUG) //是否开启日志打印
                        .setLevel(Level.BASIC) //打印的等级
                        .log(Platform.INFO) // 打印类型
                        .request("Request") // request的Tag
                        .response("Response")// Response的Tag
                        .addHeader("log-header", "I am the log request header.") // 添加打印头, 注意 key 和 value 都不能是中文
                        .build()
                )
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .connectionPool(new ConnectionPool(8, 15, TimeUnit.SECONDS))
                // 这里你可以根据自己的机型设置同时连接的个数和时间，我这里8个，和每个保持时间为10s
                .build();
        retrofit = new Retrofit.Builder()
                .client(okHttpClient)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .baseUrl(url)
                .build();

    }

    /**
     * create you ApiService
     * Create an implementation of the API endpoints defined by the {@code service} interface.
     */
    public static <T> T create(final Class<T> service) {
        if (service == null) {
            throw new RuntimeException("Api service is null!");
        }
        if(retrofit == null){
            synchronized (RetrofitClient.class){
                if(retrofit == null){
                    new RetrofitClient();
                }
            }
        }
        return retrofit.create(service);
    }

    /**
     * /**
     * execute your customer API
     * For example:
     * MyApiService service =
     * RetrofitClient.getInstance(MainActivity.this).create(MyApiService.class);
     * <p>
     * RetrofitClient.getInstance(MainActivity.this)
     * .execute(service.lgon("name", "password"), subscriber)
     * * @param subscriber
     */

    public static <T> T execute(Observable<T> observable, Observer<T> subscriber) {
        observable.subscribeOn(Schedulers.io())
                .unsubscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(subscriber);

        return null;
    }
}

以下是可以在ｐｒｅｓｅｎｔ层使用的Retrofit和ｒｘｊａｖａ的示例代码:

private void login() {
        HttpApi mloginApi;
        mloginApi = RetrofitClient.create(HttpApi.class);//对上面封装的使用
        String motime = String.valueOf(System.currentTimeMillis());

        HashMap<String, String> hashMap = new HashMap<>();
        hashMap.put("motime",motime);
        hashMap.put("smstype","REG");
        hashMap.put("phone",phone.getText().toString());

        String androidID = Settings.System.getString(this.getContentResolver(), Settings.System.ANDROID_ID);
        //关于安卓设备唯一序列号的使用可以看我之前的博文
        String sign = signMD5("",hashMap);//加密签名

        FormBody body = new FormBody.Builder()
                    .add("appid", "")
                    .add("motime",  motime)
                    .add("sign", "")
                    .add("phone", phone.getText().toString())
                    .add("mac", androidID)
                    .add("passwd",editText3.getText().toString())
                    .build();

        Observable<LoginResult> observable = mloginApi.login(body);
        observable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<LoginResult>() {
                    @Override
                    public void accept(LoginResult baseInfo) throws Exception {
                        if ("10000".equals(baseInfo.getCode())){
                            ToastUtils.showShort(baseInfo.getMsg());
                            if (checkBox2.isChecked()){
                                SharedPreferencesUtil.saveLoginInfo(getApplicationContext(),phone.getText().toString(),editText3.getText().toString());
                            }else {
                                SharedPreferencesUtil.deleteUser(getApplicationContext());
                            }
                            MyApplication.getInstance().setLoginResult(baseInfo);
                            if (baseInfo.getData().getDcvcnt()==0){
                                startActivity(AddMachineActivity.class);
                            }else {
                                startActivity(MyEquipmentAcitivity.class);
                            }

                            finish();
                        }else {
                            ToastUtils.showShort(baseInfo.getMsg());
                        }
                    }
                }, new Consumer<Throwable>() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        ToastUtils.showShort("登录失败，请稍后重试");
                    }
                });
    }