使用Retrofit打印请求日志，过滤改变服务器返回结果，直接获取String字符串直接获取字符串手动解析查看Retrofit请求网络日志自定义Interceptor实现过滤改变请求返回的数据（可使用

dependencies {
    compile 'com.squareup.retrofit2:retrofit:2.2.0'
    compile 'com.squareup.retrofit2:converter-scalars:2.0.0'
    compile 'com.squareup.retrofit2:converter-gson:2.0.2'
    compile 'com.google.code.gson:gson:2.7'
    compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
    }

compile 'com.squareup.retrofit2:converter-gson:2.0.2'
compile 'com.google.code.gson:gson:2.7'

new Retrofit.Builder()  //01:获取Retrofit对象
.baseUrl(Globals.SERVER_ADDRESS) //02采用链式结构绑定Base url
.addConverterFactory(ScalarsConverterFactory.create())//首先判断是否需要转换成字符串，简单类型
.addConverterFactory(GsonConverterFactory.create())//再将转换成bean
.client(okHttpClient)
.build();//03执行操作

public interface StartPageNet
{
    @GET("hao123-soft-online-bcs/soft/2017_02_22_W.P.S.5041.19.552.exe")
    public Call<String> getIndex();
}

if (type == String.class
        || type == boolean.class
        || type == Boolean.class
        || type == byte.class
        || type == Byte.class
        || type == char.class
        || type == Character.class
        || type == double.class
        || type == Double.class
        || type == float.class
        || type == Float.class
        || type == int.class
        || type == Integer.class
        || type == long.class
        || type == Long.class
        || type == short.class
        || type == Short.class) {
      return ScalarRequestBodyConverter.INSTANCE;
    }

 StartPageNet startPageNet = streamRetrofit.create(StartPageNet.class);
 Call<String> download = startPageNet.getIndex();
 download.enqueue(new Callback<String>()
 {
     @Override
     public void onResponse(Call<String> call, Response<String> response)
     {
         String result = response.body();
     }
     @Override
     public void onFailure(Call<String> call, Throwable t)
     {

     }
});

HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger()
{
     @Override
     public void log(String message) 
     {
         if (BuildConfig.DEBUG) Log.d("Http", message+"");
     }
});
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);//设置日志打印等级
        
 OkHttpClient  okHttpClient = new OkHttpClient.Builder()             
         .addInterceptor(loggingInterceptor)//设置日志打印
         .retryOnConnectionFailure(true)//失败重连
         .connectTimeout(30, TimeUnit.SECONDS)//网络请求超时时间单位为秒
         .build();

import com.alibaba.fastjson.JSON;

import java.io.ByteArrayInputStream;
import java.io.IOException;

import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;
import okio.BufferedSource;
import okio.Okio;

/**
 * 网络请求的拦截器
 * Created by xiaolei on 2017/3/2.
 */

public class SessionInterceptor implements Interceptor
{
    @Override
    public Response intercept(Chain chain) throws IOException
    {
        Request request = chain.request();
        Response response = chain.proceed(request);
        return new Response.Builder()
                .body(newResponseBody(response))
                .headers(response.headers())
                .message(response.message())
                .code(response.code())
                .request(response.request())
                .protocol(response.protocol())
                .build();
    }
    private ResponseBody newResponseBody(final Response response)
    {
        return new ResponseBody()
        {
            @Override
            public MediaType contentType()
            {
                return response.body().contentType();
            }
            @Override
            public long contentLength()
            {
                return response.body().contentLength();
            }
            @Override
            public BufferedSource source()
            {
                try
                {
                    String result = response.body().string();
                    if(JSON.parseObject(result).getInteger("code") == 500)
                    {
                        /**
                        *这里改变返回的数据，如果服务器返回的是一个HTML网页，
                        *那么移动端也能拿到一个Json数据，用于保证数据可解析不至于崩溃
                        */
                        ByteArrayInputStream tInputStringStream = new ByteArrayInputStream("{code:500,success:false}".getBytes());
                        BufferedSource source = Okio.buffer(Okio.source(tInputStringStream));
                        return source;
                    }else
                    {
                        ByteArrayInputStream tInputStringStream = new ByteArrayInputStream(result.getBytes());
                        BufferedSource source = Okio.buffer(Okio.source(tInputStringStream));
                        return source;
                    }
                } catch (IOException e)
                {
                    e.printStackTrace();
                    return null;
                }
            }
        };
    }
}