//定製OkHttp
OkHttpClient.Builder httpClientBuilder = new OkHttpClient
        .Builder();
if (BuildConfig.DEBUG) {//釋出版本不再列印 
    // 日誌顯示級別 
    HttpLoggingInterceptor.Level level= HttpLoggingInterceptor.Level.BASIC; 
    //新建log攔截器 
    HttpLoggingInterceptor loggingInterceptor=new HttpLoggingInterceptor(new 
 
HttpLoggingInterceptor.Logger() { 
        @Override 
        public void log(String message) {
            LogUtil.e("test","OkHttp====Message:"+message); 
        } 
    }); 
    loggingInterceptor.setLevel(level); 
    //OkHttp進行新增攔截器loggingInterceptor
    httpClientBuilder.addInterceptor(loggingInterceptor);
 
}
Retrofit retrofit = new Retrofit.Builder()
        .baseUrl(HttpHelper.HOST.toString())
        .client(httpClientBuilder.build())
        .addConverterFactory(GsonConverterFactory.create())
        .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
        .build();

HttpLoggingInterceptor.Level共包含四個級別：NONE、BASIC、HEADER、BODY

NONE 不記錄

BASIC 請求/響應行--> POST /greeting HTTP/1.1 (3-byte body)<-- HTTP/1.1 200 OK (22ms, 6-byte body)

HEADER 請求/響應行 + 頭--> Host: example.comContent-Type: plain/textContent-Length: 3<-- HTTP/1.1 200 OK (22ms)Content-Type: plain/textContent-Length: 6

BODY 請求/響應行 + 頭 + 體

可以通過 setLevel 改變日誌級別