Retrofit HttpLoggingInterceptor的

package com.example.httplogginginterceptortest;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.List;

import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Retrofit retrofit = providerRetrofit();
        IService iService = retrofit.create(IService.class);

        HashMap<String, String> params = new HashMap<>();
        params.put("userId", "3805");
        params.put("token", "a8f801d8b556dfa1870c007d88709767");
        params.put("groupId", String.valueOf(5));
        params.put("type", String.valueOf(1));
        params.put("page", String.valueOf(1));
        params.put("pageSize", String.valueOf(5));
        iService.getRankForGroupUser(params).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Consumer<PublicResponseEntity<List<RankForGroupUserEntity>>>() {
            @Override
            public void accept(PublicResponseEntity<List<RankForGroupUserEntity>> listPublicResponseEntity) throws Exception {
                   Log.i("zhang_xin","成功--------------------------------");
            }
        }, new Consumer<Throwable>() {
            @Override
            public void accept(Throwable throwable) throws Exception {
                Log.i("zhang_xin","失败--------------------------------");
            }
        });

    }

    private Retrofit providerRetrofit() {
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
            @Override
            public void log(String message) {
                try {
                    String text = URLDecoder.decode(message, "utf-8");
                    Log.e("zhang_xin", text);
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                    Log.e("zhang_xin", message);
                }
            }
        });
        //这里可以builder(). 添加更多的内容 具体看需求
        OkHttpClient mClient = new OkHttpClient.Builder()
                .addInterceptor(interceptor)
//                .connectTimeout(30, TimeUnit.SECONDS)
//                .writeTimeout(10,TimeUnit.MINUTES)
//                .readTimeout(10,TimeUnit.MINUTES)
                .build();

        //这行必须加 不然默认不打印
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        Retrofit retrofit = new Retrofit.Builder().baseUrl("http://119.253.81.55/tkheal/")
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                //添加HttpClient
                .client(mClient).build();

        return retrofit;
    }
}

需要添加的依赖

 implementation 'com.squareup.retrofit2:retrofit:2.4.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
    implementation 'io.reactivex.rxjava2:rxjava:2.1.0'
    implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.4.1'
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'

看下打印输出结果