Retrofit2.0添加Header的方法总结

一、使用注解

1. 添加单个header

public interface ApiService {  
    @Headers("Content-Type: application/javascript")
    @GET("/data")
    Call> getData();
}

2. 添加多个header

public interface ApiService {  
    @Headers({
        "Content-Type: application/javascript",
        "User-Agent: YourAgent"
    })
    @GET("/data/{user_id}")
    Call> getData();
}

3. 动态添加header

public interface ApiService {  
    @GET("/data")
    Call> getData(@Header("Content-Range") String contentRange);
}

二、如果要添加全局header，则需要在代码中添加header

OkHttpClient client = new OkHttpClient.Builder()
                .addInterceptor(new Interceptor() {
                    @Override
                    public Response intercept(Chain chain) throws IOException {
                        Request request = chain.request()
                                .newBuilder()
                                .addHeader("X-Requested-With", "XMLHttpRequest")
                                .addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36")
                                .build();
                        return chain.proceed(request);
                    }
                }).build();
Retrofit retrofit = new Retrofit.Builder()  
    .baseUrl(Constant.BASE_URL)
    .addConverterFactory(GsonConverterFactory.create())
    .client(client)
    .build();