需求1：更加统一方便管理公共参数
需求2：方便调试http请求日志，查看请求参数和返回参数

新增一个网络拦截器，代码如下：

LogInterceptor 类：

public class LogInterceptor implements Interceptor {

public static String TAG = "LogInterceptor";

@Override
public okhttp3.Response intercept(Interceptor.Chain chain) throws IOException {
    Request oldRequest = chain.request();
    Request.Builder newRequestBuild;
    String method = oldRequest.method();
    String postBodyString="";
    if("POST".equals(method)){
        FormBody.Builder formBodyBuilder = new FormBody.Builder();
        formBodyBuilder.add("deviceOs", iCommon.DEVICE_OS);
        formBodyBuilder.add("appVersion", Utils.instance().getAppVersionName());
        newRequestBuild = oldRequest.newBuilder();

        RequestBody formBody = formBodyBuilder.build();
        postBodyString = bodyToString(oldRequest.body());
        postBodyString += ((postBodyString.length() > 0) ? "&" : "") + bodyToString(formBody);
        newRequestBuild.post(RequestBody.create(MediaType.parse("application/x-www-form-urlencoded;charset=UTF-8"), postBodyString));
    }else {
        // 添加新的参数
        HttpUrl.Builder commonParamsUrlBuilder = oldRequest.url()
            .newBuilder()
            .scheme(oldRequest.url().scheme())
            .host(oldRequest.url().host())
            .addQueryParameter("deviceOs", iCommon.DEVICE_OS)
            .addQueryParameter("appVersion", Utils.instance().getAppVersionName());
        newRequestBuild = oldRequest.newBuilder()
            .method(oldRequest.method(), oldRequest.body())
            .url(commonParamsUrlBuilder.build());
    }
    Request newRequest = newRequestBuild
        .addHeader("Accept", "application/json")
        .addHeader("Accept-Language", "zh")
        .build();

    long startTime = System.currentTimeMillis();
    okhttp3.Response response = chain.proceed(newRequest);
    long endTime = System.currentTimeMillis();
    long duration = endTime - startTime;
    okhttp3.MediaType mediaType = response.body().contentType();
    String content = response.body().string();
    int httpStatus = response.code();
    StringBuilder logSB = new StringBuilder();
    logSB.append("-------start:"+method+"|");
    logSB.append(newRequest.toString()+"\n|");
    logSB.append(method.equalsIgnoreCase("POST")?"post参数{"+ postBodyString +"}\n|":"");
    logSB.append("httpCode=" + httpStatus + ";Response:" + content+"\n|");
    logSB.append("----------End:" + duration + "毫秒----------");
    Log.d(TAG,logSB.toString());
    return response.newBuilder()
        .body(okhttp3.ResponseBody.create(mediaType, content))
        .build();
}
private static String bodyToString(final RequestBody request) {
    try {
        final RequestBody copy = request;
        final Buffer buffer = new Buffer();
        if (copy != null)
            copy.writeTo(buffer);
        else
            return "";
        return buffer.readUtf8();
    } catch (final IOException e) {
        return "did not work";
    }
}
}

使用方法：

OkHttpClient.Builder builder = new OkHttpClient.Builder();
    builder.retryOnConnectionFailure(false)
        .cookieJar(s_cookieJar)
        .connectTimeout(DEFAULT_NETWORK_TIMEOUT, TimeUnit.MILLISECONDS)
        .readTimeout(DEFAULT_NETWORK_TIMEOUT, TimeUnit.MILLISECONDS)
        .writeTimeout(DEFAULT_NETWORK_TIMEOUT, TimeUnit.MILLISECONDS)
        .addInterceptor(new LogInterceptor());