Android的HttpPost超时异常不工作

Question

我想设置我的应用程序在HttpPost 3秒后引发超时异常。我正在从ASyncTask执行此请求。出于某种原因，即使我给它一个不存在的域，它也会挂起大约一两分钟，然后抛出最后一个异常。我的超时例外怎么不起作用？

protected Void doInBackground(String... params) { 
      HttpPost httpPost = new HttpPost("http://hgfdhgfdhgfdhfgdhgfdhgfdhfgd.com"); 
      HttpParams httpParameters = new BasicHttpParams(); 
      HttpConnectionParams.setConnectionTimeout(httpParameters, 3000); 
      HttpConnectionParams.setSoTimeout(httpParameters, 3000); 
      DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters); 
      try { 
       httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
       HttpResponse httpResponse = httpClient.execute(httpPost); 
       HttpEntity httpEntity = httpResponse.getEntity(); 
       is = httpEntity.getContent(); 

      } catch(ConnectTimeoutException e){ 
       Log.e("Timeout Exception: ", e.toString()); 
      } catch(SocketTimeoutException ste){  
       Log.e("Timeout Exception: ", ste.toString()); 
      } catch (Exception e) { 
       Log.e("log_tag", "Error in http connection "+e.toString()); 
      } 

      try { 
       BufferedReader br = new BufferedReader(new InputStreamReader(is)); 
       StringBuilder sb = new StringBuilder(); 
       String line = ""; 
       while((line=br.readLine())!=null){ 
        sb.append(line+"\n"); 
       } 
       is.close(); 
       result=sb.toString(); 
      } catch (Exception e) { 
       Log.e("log_tag", "Error converting result "+e.toString()); 
      } 
      return null; 

     } 

Answer 1

不要在那里叫完。

为什么当出现带有特定错误消息的异常时不返回空值。

在postexecute方法中，当结果为null时，做任何需要做的事情。