背景

开发中，有时需要核对接口请求和响应参数，需要看到详细的接口调用。本来可以通过Facebook Stetho来监控接口的，但是受限于网络，导致调测界面打不开，所以只要寻求其他方案。

解决方案

通过okhttp添加拦截器，打印接口调用日志。

1. 添加依赖
   implementation 'com.squareup.okhttp3:logging-interceptor:3.9.1'
2. 添加拦截器
   HttpLogInterceptor.java

import android.util.Log;

import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
import java.util.concurrent.TimeUnit;

import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
import okio.Buffer;
import okio.BufferedSource;

/**
 * okhttp 拦截器
 */

public class HttpLogInterceptor implements Interceptor {
    private static final String TAG = HttpLogInterceptor.class.getSimpleName();
    private final Charset UTF8 = Charset.forName("UTF-8");

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();
        RequestBody requestBody = request.body();
        String body = null;
        if (requestBody != null) {
            Buffer buffer = new Buffer();
            requestBody.writeTo(buffer);
            Charset charset = UTF8;
            MediaType contentType = requestBody.contentType();
            if (contentType != null) {
                charset = contentType.charset(UTF8);
            }
            body = buffer.readString(charset);
        }

        Log.d(TAG,
                "发送请求: method：" + request.method()
                        + "\nurl：" + request.url()
                        + "\n请求头：" + request.headers()
                        + "\n请求参数: " + body);

        long startNs = System.nanoTime();
        Response response = chain.proceed(request);
        long tookMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs);

        ResponseBody responseBody = response.body();
        String rBody;

        BufferedSource source = responseBody.source();
        source.request(Long.MAX_VALUE);
        Buffer buffer = source.buffer();

        Charset charset = UTF8;
        MediaType contentType = responseBody.contentType();
        if (contentType != null) {
            try {
                charset = contentType.charset(UTF8);
            } catch (UnsupportedCharsetException e) {
                e.printStackTrace();
            }
        }
        rBody = buffer.clone().readString(charset);

        Log.d(TAG,
                "收到响应: code:" + response.code()
                        + "\n请求url：" + response.request().url()
                        + "\n请求body：" + body
                        + "\nResponse: " + rBody);

        return response;
    }
}

添加拦截器(该拦截器需要最后添加，否则其他对request、response做修改的Interceptor所导致的变更就无法打印出来的。)：

Interceptor loggingInterceptor = new HttpLoggingInterceptor();
okBuilder.addInterceptor(loggingInterceptor)

3. 打印出的日志样例：

   
   image.png

4. 如果想要格式化输出的消息格式，可以参考《利用logger打印完整的okhttp网络请求和响应日志》

安卓开发技术分享: https://www.jianshu.com/p/442339952f26