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####本项目的目的是学习研究并最终实现基于Retrofit OkHttp 和RxJava Gson的Android 网络请求库

• 实现AuthToken的过期和二次自动获取机制 100%
• 实现基础的参数的自动加入 100%
• 实现参数的加密和签名 100%
• 支持GET POST 以及文件传输 60%
• 实现一个NodeJs Server 模拟真实的服务器 100%
• 方便的支持Mock 40%
• 支持自定义Cache 100%

###URL Connection和 OkHttp 之间的关系 首先是conn = (HttpURLConnection) myUrl.openConnection();

    public URLConnection openConnection() throws IOException {
        return streamHandler.openConnection(this);
    }

    /**
     * Sets the stream handler factory for this VM.
     *
     * @throws Error if a URLStreamHandlerFactory has already been installed
     *     for the current VM.
     */
    public static synchronized void setURLStreamHandlerFactory(URLStreamHandlerFactory factory) {
        if (streamHandlerFactory != null) {
            throw new Error("Factory already set");
        }
        streamHandlers.clear();
        streamHandlerFactory = factory;
    }

    void setupStreamHandler() {
        // Check for a cached (previously looked up) handler for
        // the requested protocol.
        streamHandler = streamHandlers.get(protocol);
        if (streamHandler != null) {
            return;
        }
        if (protocol.equals("http")) {
            try {
                String name = "com.android.okhttp.HttpHandler";
                streamHandler = (URLStreamHandler) Class.forName(name).newInstance();
            } catch (Exception e) {
                throw new AssertionError(e);
            }
        } else if (protocol.equals("https")) {
            try {
                String name = "com.android.okhttp.HttpsHandler";
                streamHandler = (URLStreamHandler) Class.forName(name).newInstance();
            } catch (Exception e) {
                throw new AssertionError(e);
            }
        } else if (protocol.equals("jar")) {
            streamHandler = new JarHandler();
        }
        if (streamHandler != null) {
            streamHandlers.put(protocol, streamHandler);
        }
    }

*第三方Jar包怎么统一统计网络请求时间?

###什么是Retrofit 它 的使用方法API 简介

• Retrofit 是Square公司提供的高效的Http库,基于OK HTTP提供网络访问功能
• 将底层的代码都封装起来, 应用关注业务中的数据模型和操作方法
• API 设计

public interface IUserProfileService {
    @Headers("Cache-Control: max-age=6400")
    @GET("/users/{user}/profile")
    Observable<Response<UserProfile>> getUserProfile(@Query("userId") String userId);

    @FormUrlEncoded
    @POST("/users/{user}/profile")
    Observable<ResultModel> updateUserProfile(@Field("userId") String userId, @Body UserProfile profile);

    
    @GET("widget/list")
    Call<List<Widget>> widgetList();
}

• API 使用

OkHttpClient.Builder clientBuilder = new OkHttpClient().newBuilder();
HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();
httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
clientBuilder.addInterceptor(httpLoggingInterceptor);
clientBuilder.addInterceptor(new AddParamIterceptor());
CacheInterceptor cacheInterceptor = new CacheInterceptor(mContext);
clientBuilder.addInterceptor(new SignatureIterceptor()).addInterceptor(cacheInterceptor);
sOkHttpClient = clientBuilder.build();
cacheInterceptor.setCache(sOkHttpClient.cache());
sRetrofit = new Retrofit.Builder().client(sOkHttpClient)
                        .baseUrl(API)
                        .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                        .addConverterFactory(GsonConverterFactory.create())
                        .build();

RetrofitUtil.getInstance(this)
      .get(IUserProfileService.class)
      .getUserProfile("498238400")
      .subscribeOn(Schedulers.io())
      .observeOn(AndroidSchedulers.mainThread())
      .subscribe(new Subscriber<Response<UserProfile>>() {
                });

###内部原理

1. 动态代理
2. CallAdapter
3. Converter 设计模式

###项目代码分析

会增加多大的安装包

依赖和参考项目

1. https://github.com/alighters/AndroidDemos
2. npm modules express body-parser

参考文献 http://expressjs.com/ https://github.com/alighters/AndroidDemos