Android關于連接配接需要Portal認證的WIFI

前言

有時候會遇到個很蛋疼的問題，通路網絡時候代碼的邏輯時若果目前網絡連接配接就通路，否則就不通路。這時候如果不想在具體的代碼邏輯中添加一些判斷的話，遇到手機連接配接到需要認證登陸的wifi的情況就吃屎了。

這種需要登陸的wifi一般就是在我們發任何一個HTTP請求時候重定向到它的登入界面。這時候我想知道我是不是連接配接到了這樣的wifi該怎麼呢？其實Google提供了關于HttpURLConnection在這種情況下的判斷，思路很簡單就是判斷請求後url的Host和請求前是否相同，代碼如下

HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
   try {
     InputStream in = new BufferedInputStream(urlConnection.getInputStream());
     if (!url.getHost().equals(urlConnection.getURL().getHost())) {
       // we were redirected! Kick the user out to the browser to sign on?

     ...
   } finally {
     urlConnection.disconnect();
   }
 }
           

那麼對于HttpClient要怎麼做呢？

public static String get(String url) throws IOException{
        String content = null;
        HttpResponse response = null;
        HttpGet get = new HttpGet(url);
        get.setHeader("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3");
        HttpConnectionParams.setConnectionTimeout(get.getParams(), );
        HttpContext httpContext=new BasicHttpContext();
        response = httpClient.execute(get,httpContext);
        HttpHost currentHost = (HttpHost) httpContext
                .getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        if (!currentHost.getHostName().equals(get.getURI().getHost())){
        //這時候就應該是連接配接着需要登入的wifi
        }
        HttpEntity entity = response.getEntity();
        content = EntityUtils.toString(entity);
        return content;
    }