背景

開發中，有時需要核對介面請求和響應引數，需要看到詳細的介面呼叫。本來可以通過Facebook Stetho來監控介面的，但是受限於網路，導致調測介面打不開，所以只要尋求其他方案。

解決方案

通過okhttp新增攔截器，列印介面呼叫日誌。

1. 新增依賴
   implementation 'com.squareup.okhttp3:logging-interceptor:3.9.1'
2. 新增攔截器
   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 攔截器
 */

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,
                "傳送請求: method：" + request.method()
                        + "\nurl：" + request.url()
                        + "\n請求頭：" + request.headers()
                        + "\n請求引數: " + 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,
                "收到響應: code:" + response.code()
                        + "\n請求url：" + response.request().url()
                        + "\n請求body：" + body
                        + "\nResponse: " + rBody);

        return response;
    }
}
 

新增攔截器(該攔截器需要最後新增，否則其他對request、response做修改的Interceptor所導致的變更就無法打印出來的。)：

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

3. 打印出的日誌樣例：
   

4. 如果想要格式化輸出的訊息格式，可以參考《利用logger列印完整的okhttp網路請求和響應日誌》

安卓開發技術分享: https://blog.csdn.net/yinxing2008/article/details/84555061