Retrofit，Okhttp对每个Request统一动态添加header和参数

How to Add header to Every Request

添加统一通用header， 不会覆盖前面的header

okHttpClient.interceptors().add(new Interceptor() {  

    @Override

    public Response intercept(Interceptor.Chain chain) throws IOException {

        Request original = chain.request();

        // Request customization: add request headers

        Request.Builder requestBuilder = original.newBuilder()

                    .addHeader("header-key", "value1")

                    .addHeader("header-key", "value2");

        Request request = requestBuilder.build();

        return chain.proceed(request);

    }

});

添加统一通用header， 会覆盖前面的header

okHttpClient.interceptors().add(new Interceptor() {  

    @Override

    public Response intercept(Interceptor.Chain chain) throws IOException {

        Request original = chain.request();

        // Request customization: add request headers

        Request.Builder requestBuilder = original.newBuilder()

                .header("headerkey", "header-value"); // <-- this is the important line

        Request request = requestBuilder.build();

        return chain.proceed(request);

    }

Parameters

How to Add Query Parameters to Every Request

OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

httpClient.addInterceptor(new Interceptor() {  

    @Override

    public Response intercept(Chain chain) throws IOException {

        Request original = chain.request();

        HttpUrl originalHttpUrl = original.url();

        HttpUrl url = originalHttpUrl.newBuilder()

                .addQueryParameter("apikey", "your-actual-api-key")

                .build();

        // Request customization: add request headers

        Request.Builder requestBuilder = original.newBuilder()

                .url(url);

        Request request = requestBuilder.build();

        return chain.proceed(request);

    }

});

Retrofit+RxJava结合系列请阅读：

Retrofit 2.0 

超能实践，完美支持Https传输

Retrofit2.0 

完美同步Cookie实现免登录

Retrofit 2.0 超能实践（三），轻松实现文件/图片上传

-Retrofit 2.0 超能实践（四），完成大文件断点下载

基于Retrofit2.0 封装的超好用的RetrofitClient工具类

玩转IOC，教你徒手实现自定义的Retrofit框架

Rxjava +Retrofit 你需要掌握的几个技巧，Retrofit缓存，统一对有无网络处理, 返回结果问题