如何在android中實現請求超時？

Question

朋友，

我遇到了一個問題，當我嘗試調用webservice並且服務器/ internet不可用時。看起來 連接需要很長時間才能超時

我可以手動設置timout來向用戶顯示錯誤消息嗎？

任何幫助，將不勝感激。

Answer 1

設置您的HttpClient這種方式。

BasicHttpParams httpParams = new BasicHttpParams(); 
    ConnManagerParams.setTimeout(httpParams, connectionTimeoutInMs); 
    httpClient = new DefaultHttpClient(httpParams); 

Answer 2

你可以嘗試這樣來做：

URL url; 
URLConnection connection; 
try { 
    url = new URL("http://foo.bar.com"); 
    connection = url.openConnection(); 
    connection.setConnectTimeout(3000); // set 3 seconds for timeout 
    connection.connect(); 
}catch(SocketTimeoutException ss){ 
    // show message to the user 
} 

Answer 3

This will work always... 


try  { 
    HttpParams httpParams = new BasicHttpParams(); 
    HttpConnectionParams.setConnectionTimeout(httpParams, Constants.CONN_TIMEOUT); 
    HttpConnectionParams.setSoTimeout(httpParams, Constants.SOCKET_CONN_TIMEOUT); 
    DefaultHttpClient httpClient = new DefaultHttpClient(httpParams); 
    url = "write-your-web-url-here";    
    HttpGet httpGet = new HttpGet(url); 
    response = httpClient.execute(httpGet); 
    HttpEntity entity = response.getEntity`enter code here`(); 
    if(entity != null) is = entity.getContent(); 
}catch(ConnectTimeoutException timeoutException) { 
    System.out.println("ConnectTimeoutException Occured..."); 
}catch(SocketTimeoutException socketTimeoutException) { 
    System.out.println("SocketTimeoutException Occured...") 
}catch(Exception e){ 
    System.out.println("Exception Occured..."); 
} 

Answer 4

有兩種超時：

1. 連接超時

即直到建立了連接的時間

Socket Timeout

這是等待接收數據的超時時間，將它們中的任何一個設置爲0意味着無限超時，並且這是兩者的默認值，因此設置其中一個不會影響另一個。

try{ 

    BasicHttpParams httpParams = new BasicHttpParams(); 

    //this will set socket timeout 
    HttpConnectionParams.setSoTimeout(httpParams, /*say*/ 3000); 

    //this will set connection timeout 
    HttpConnectionParams.setConnectionTimeout(httpParams, 3000); 

    client = new DefaultHttpClient(httpParams); 

    String url = "some-url";    
    HttpGet httpGet = new HttpGet(url); 
    response = httpClient.execute(httpGet); 
    //here use the received response 

    } 
    catch(ConnectTimeoutException ex) { 
     //handle connection timeout here 
    } 
    catch(SocketTimeoutException ex) { 
     //handle socket timeout here 
    }