android - Android 连接超时异常

Question

以下是我遇到异常（超时）的代码，请提供任何解决方案或教程。在 4.0.4 api 级别设备上使用

 HttpClient client = new DefaultHttpClient();

HttpPost request = new HttpPost(url);

 List<NameValuePair> params = new LinkedList<NameValuePair>();

> param has some values and a string of bitmap.

 HttpResponse response = client.execute(request);

StringBuilder receivedData = new StringBuilder();

BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

String line = null;

while ((line = reader.readLine()) != null) 
{

receivedData.append(line);

}

Answer 1

尝试这个：

HttpConnectionParams.setConnectionTimeout(httpParams,
        TIMEOUT_MILLISEC);
HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);

Answer 2

首先你需要了解什么是connectiontimeoutexception：

连接到 HTTP 服务器或等待来自 HttpConnectionManager 的可用连接时超时。

所以这意味着您设备的互联网无法与 HTTP 服务器建立连接并且请求超时。你可以做以下两件事来避免这种情况：

1. 在使用以下方法进行 HTTP 调用之前检查活动的 Internet 连接：

   public static Boolean checkActiveInternet(Context activity) {
   ConnectivityManager cm = (ConnectivityManager) activity.getSystemService(Context.CONNECTIVITY_SERVICE);
       NetworkInfo netInfo = cm.getActiveNetworkInfo();
       if (netInfo != null && netInfo.isConnectedOrConnecting()) {
           return true;
       } else if (netInfo != null&& (netInfo.getState() == NetworkInfo.State.DISCONNECTED|| netInfo.getState() == NetworkInfo.State.DISCONNECTING|| netInfo.getState() == NetworkInfo.State.SUSPENDED || netInfo.getState() == NetworkInfo.State.UNKNOWN)) {
           return false;
       } else {
           return false;
       }
   

   }

2. 为您的 HTTP 请求设置更大的超时时间，如下所示：

   公共静态字符串连接（字符串 url）抛出 IOException {

   HttpGet httpget = new HttpGet(url);
   HttpResponse response;
   HttpParams httpParameters = new BasicHttpParams();
   int timeoutConnection = 60 * 1000;
   HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
   int timeoutSocket = 60 * 1000;
   
   HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
   HttpClient httpclient = new DefaultHttpClient(httpParameters);
   try {
   
       response = httpclient.execute(httpget);
   
       HttpEntity entity = response.getEntity();
       if (entity != null) {
           InputStream instream = entity.getContent();
           result = convertStreamToString(instream);
           // instream.close();
       }
   } catch (ClientProtocolException e) {
       Utilities.showDLog("connect", "ClientProtocolException:-" + e);
   } catch (IOException e) {
       Utilities.showDLog("connect", "IOException:-" + e);
   }
   return result;
   

   }