Retrofit+Rxjava请求工具类

一；此乃一个retrofit+Rxjava实现网络请求封装的一个工具类；
       下边是参考依赖；
     compile 'io.reactivex.rxjava2:rxjava:2.0.8'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
     compile 'com.squareup.retrofit2:retrofit:2.2.0'
     compile 'com.squareup.retrofit2:converter-gson:2.2.0'
     compile 'com.squareup.retrofit2:adapter-rxjava2:2.2.0'
     compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
二，如下工具类；
public class HttpManager {

    private static HttpManager instance;

    private static Retrofit retrofit;

    private HttpManager() {
        HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor(message -> {
            LogUtil.i("retrofit = " + message); // 打印retrofit日志
        }).setLevel(HttpLoggingInterceptor.Level.BODY);

//        Interceptor headerInterceptor = chain -> {
//            Request request = chain.request()
//                    .newBuilder()
//                    .addHeader("token", SharePreferenceUtils.get(HaoYunApp.getAppContext(), LoginQuery.LOGIN_TOKEN))
//                    .addHeader("userId", SharePreferenceUtils.getInt(HaoYunApp.getAppContext(), LoginQuery.LOGIN_USERID) + "")
//                    .addHeader("devId", DeviceUtils.getDeviceID(HaoYunApp.getAppContext()))
//                    .build();
//            return chain.proceed(request);
//        };

        OkHttpClient mOkHttpClient = new OkHttpClient().newBuilder()
                .connectTimeout(10, TimeUnit.SECONDS) // 设置超时时间
                .readTimeout(10, TimeUnit.SECONDS) // 设置读取超时时间
                .writeTimeout(10, TimeUnit.SECONDS) // 设置写入超时时间
                .cache(new Cache(HaoYunApp.getInstance().getCacheDir(), 10 * 1024 * 1024)) // 10MB缓存
//                .addInterceptor(headerInterceptor) // 添加header信息
                .addInterceptor(loggingInterceptor)
                .build();

        retrofit = new Retrofit.Builder()
                .baseUrl(Interface.COMMON)
                .client(mOkHttpClient)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build();
    }

    public static HttpManager getInstance() {
        if (null == instance) {
            synchronized (HttpManager.class) {
                if (null == instance) {
                    instance = new HttpManager();
                }
            }
        }
        return instance;
    }

    public static IApi getHttpImpl() {
        getInstance();
        return retrofit.create(IApi.class);
    }

    public Retrofit getRetrofit() {
        return retrofit;
    }

}