开发中会遇到URL需要动态切换，若你还是通过gradle打包切换是否不太灵活，下面将介绍一下retrofit基于OKhttp中动态修改URL；
原理添加拦截器，在retrofit中的现实更加灵活了如下代码：
private RetrofitUrlManager() {if (!DEPENDENCY_OKHTTP) { //使用本框架必须依赖 Okhttpthrow new IllegalStateException("Must be dependency Okhttp");}UrlParser urlParser = new DefaultUrlParser();urlParser.init(this);setUrlParser(urlParser);this.mInterceptor = new Interceptor() {@Overridepublic Response intercept(Chain chain) throws IOException {if (!isRun()) // 可以在 App 运行时, 随时通过 setRun(false) 来结束本框架的运行return chain.proceed(chain.request());return chain.proceed(processRequest(chain.request()));}};}
下面是对retrofit设置的URL解析及添加到拦截器中
/*** 对 {@link Request} 进行一些必要的加工, 执行切换 BaseUrl 的相关逻辑** @param request {@link Request}* @return {@link Request}*/public Request processRequest(Request request) {if (request == null) return request;Request.Builder newBuilder = request.newBuilder();String url = request.url().toString();//如果 Url 地址中包含 IDENTIFICATION_IGNORE 标识符, 框架将不会对此 Url 进行任何切换 BaseUrl 的操作if (url.contains(IDENTIFICATION_IGNORE)) {return pruneIdentification(newBuilder, url);}String domainName = obtainDomainNameFromHeaders(request);HttpUrl httpUrl;Object[] listeners = listenersToArray();// 如果有 header,获取 header 中 domainName 所映射的 url,若没有,则检查全局的 BaseUrl,未找到则为nullif (!TextUtils.isEmpty(domainName)) {notifyListener(request, domainName, listeners);httpUrl = fetchDomain(domainName);newBuilder.removeHeader(DOMAIN_NAME);} else {notifyListener(request, GLOBAL_DOMAIN_NAME, listeners);httpUrl = getGlobalDomain();}if (null != httpUrl) {HttpUrl newUrl = mUrlParser.parseUrl(httpUrl, request.url());if (debug)Log.d(RetrofitUrlManager.TAG, "The new url is { " + newUrl.toString() + " }, old url is { " + request.url().toString() + " }");if (listeners != null) {for (int i = 0; i < listeners.length; i++) {((onUrlChangeListener) listeners[i]).onUrlChanged(newUrl, request.url()); // 通知监听器此 Url 的 BaseUrl 已被切换}}return newBuilder.url(newUrl).build();}return newBuilder.build();}
具体的使用，在retrofitAPI接口中添加@Headers({"Domain-Name: CONTROL"}) Domain-Name是key,CONTROL 设置的URL对应的key名称
/*** -----------------------* @author: qiuxianfu* @date: 2021/1/27* -----------------------*/
public interface PerformanceApi {@Headers({"Domain-Name: CONTROL"})@POST("xxx/xxx/getSiteAreaPlanning")Observable<PerformancesResponse> getDataList(@Query("userCode") String userCode);@Headers({"Domain-Name: CONTROL"})@POST("xxx/xxx/addDutyRoster")Observable<AddDutyTosterResponse> addDutyRoster(@Body AddDutyRosterRequest rosterRequest);}
这里就是动态设置了，CONTROL这个和@Headers({"Domain-Name: CONTROL"}) 保持一致
RetrofitUrlManager.getInstance().putDomain("CONTROL", InfieldAppUtils.getServerControlHttp()); }
地址：https://github.com/qxf323/RetrofitUrlManager
