无法打开来自谷歌地图API在Android的流？

Question

当我使用下面的URL在Android上的地图绘制路线：当urlConnection.getInputStream被称为

StringBuilder urlString = new StringBuilder(); 
    urlString.append("http://maps.google.com/maps?f=d&hl=en"); 
    urlString.append("&saddr="); 
    urlString.append(src); 
    urlString.append("&daddr=");// to 
    urlString.append(dest); 
    urlString.append("&ie=UTF8&0&om=0&output=kml"); 

它投掷例外。

HttpURLConnection urlConnection=(HttpURLConnection)url.openConnection(); 
     urlConnection.setRequestMethod("GET"); 
     urlConnection.setDoOutput(true); 
     urlConnection.setDoInput(true); 
     urlConnection.connect(); 

     DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
     DocumentBuilder db = dbf.newDocumentBuilder(); 
     doc = db.parse(urlConnection.getInputStream()); 

新代码：

Document doc=null; 

     try 
     { 

      String url = getUrl(p, q); 
      DocumentBuilderFactory dbfAdd = DocumentBuilderFactory.newInstance(); 
      DocumentBuilder dbAdd = dbfAdd.newDocumentBuilder(); 
      doc = dbAdd.parse(url.toString()); 

Answer 1

IIRC Android的XML文档解析器不能处理的InputStream哪些块。更好地使用它执行下载为你解析（）版本，即：

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
DocumentBuilder db = dbf.newDocumentBuilder(); 
doc = db.parse(urlString.toString());