解決步驟：

1.web.config中

<configuration>
  <configSections>
    ...
    <section name="rewriter" requirePermission="false" type="Intelligencia.UrlRewriter.Configuration.RewriterConfigurationSectionHandler, Intelligencia.UrlRewriter" /><!--加入此行-->
  </configSections>
　...
  <system.web>
    <httpModules>
      <add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule, Intelligencia.UrlRewriter" /><!--加入此行-->
    
    </httpModules>
 
  ...
　</system.web>
  ...
  <system.webServer>
    
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true"><!--加入此行-->
    </modules>
  ...

</configuration>

2. App_Start/RouteConfig.cs文件中　　

    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            routes.IgnoreRoute("{resource}.apk");// 加入此行
    
            ...
         }
      }
 

3. IIS中配置MIME文件映射

.apk application/vnd.android

android從IIS/asp.net下載apk文件