请问各位大神Okhttp底层是如何实现拦截的？如何实现AOP的？研究了好久也看不出来，谢谢指教谢谢

Question

Answer 1

底层没研究过，我一般是这么使用的拦截器，你参考下：

1.创建对象

  mOkHttpClient.newBuilder()
                    .cache(cache)//缓存路径
                    .cookieJar(CookiesManager.getInstance())
                    .retryOnConnectionFailure(true)
                    .connectTimeout(15, TimeUnit.SECONDS)
                    .readTimeout(300, TimeUnit.SECONDS)
                    .writeTimeout(300, TimeUnit.SECONDS)
                    .addNetworkInterceptor(cacheIntercepter)//网络拦截器
                    .build();

2.拦截器

 //网络拦截器：设置缓存策略
    private Interceptor cacheIntercepter = new Interceptor() {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();

            //无网的时候强制使用缓存
            if (!NetworkUtil.isConnected()) {
                ToastUtil.showShortMessage("网络不可用,开始加载本地缓存");
                request = request.newBuilder()
                        .cacheControl(CacheControl.FORCE_CACHE)
                        .build();
            }

            Response response = chain.proceed(request);

            //有网的时候读接口上的@Headers里的配置，你可以在这里进行统一的设置
            if (NetworkUtil.isConnected()) {
                String cacheControl = request.cacheControl().toString();
                return response.newBuilder()
//                    .addHeader("TerminalCode", "android_app")
//                    .addHeader("TerminalVersion", "v" + FrameWorkSetting.clientVersion)
//                    .addHeader("TerminalSim", FrameWorkSetting.phoneMODEL)
                        .header("Cache-Control", cacheControl)
                        .removeHeader("Pragma")
                        .build();
            } else {
                int maxStale = 60 * 60 * 24 * 28; // tolerate 4-weeks stale
                return response.newBuilder()
//                    .addHeader("TerminalCode", "android_app")
//                    .addHeader("TerminalVersion", "v" + FrameWorkSetting.clientVersion)
//                    .addHeader("TerminalSim", FrameWorkSetting.phoneMODEL)
                        .header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
                        .removeHeader("Pragma")
                        .build();
            }
        }

    };