如何檢查服務器可用性的Android

我有以下代碼來檢查服務器的可用性，但它不工作我一直在使用連接管理器效果很好如何檢查服務器可用性的Android

public static boolean isConnected(Context context, String url){ 
    ConnectivityManager connectivityManager=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE); 
    if(connectivityManager!=null){ 

     if ((connectivityManager.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED) 
        ||(connectivityManager.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTING) 
        ||(connectivityManager.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTING) 
        ||(connectivityManager.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED)) 
      { 


        try{ 
         URL myUrl = new URL(url); 
         URLConnection connection = myUrl.openConnection(); 
         connection.setConnectTimeout(5000); 
         connection.connect(); 
         return true; 
        } catch (Exception e) { 
         // Handle your exceptions 
         return false; 
        } 



      } 

    } 
    return false; 

}

來源

2014-02-11 HemangNirmal

您的**代碼在哪裏檢查服務器可用性**？ –

內部嘗試並捕獲 – HemangNirmal

您可以通過提出請求來檢查服務器的可用性。如果你在超時時間內得到響應（檢查響應長度），那麼你的服務器可用，如果沒有，那麼服務器失敗。這就是 –

檢查網絡可用性，你可以這樣做：

  HttpParams httpParams = new BasicHttpParams(); 
     //int some_reasonable_timeout = (int) (30 * DateUtils.SECOND_IN_MILLIS); 
     int some_reasonable_timeout = 10; 
     HttpConnectionParams.setConnectionTimeout(httpParams, some_reasonable_timeout); 
     HttpConnectionParams.setSoTimeout(httpParams, some_reasonable_timeout); 
     //DefaultHttpClient client = new DefaultHttpClient(); 

     // get the response 
     HttpResponse response = null; 
     try { 
      response = client.execute(request); 
     } catch (ClientProtocolException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     StatusLine status = response.getStatusLine(); 
     Log.d("tag","status is"+status.toString()); 
      if (status.getStatusCode() == HttpStatus.SC_OK) 
      { 
      //cserver is available 
      } 
      else 
      { 
       //server is not available 
      }

來源

2014-02-11 06:06:53

有很多方法。但我選擇這個way.You可以實現像下面：

HttpClient httpclient = new DefaultHttpClient(); 
    String response = null; 
    URI url; 
    try { 

     String s = "url"; 

     url = new URI(s.replace(" ", "%20")); 

     Log.e("my webservice", "My webservice : " + url); 

     HttpGet httpget = new HttpGet(url); 
     HttpResponse httpResponse = null; 

     HttpParams httpParameters = new BasicHttpParams(); 
     // Set the timeout in milliseconds until a connection is 
     // established. 
     // The default value is zero, that means the timeout is not used. 
     int timeoutConnection = 3000; 
     HttpConnectionParams.setConnectionTimeout(httpParameters, 
       timeoutConnection); 
     // Set the default socket timeout (SO_TIMEOUT) 
     // in milliseconds which is the timeout for waiting for data. 
     int timeoutSocket = 5000; 
     HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket); 


     DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters); 

     // Execute HTTP Post Request 
     httpResponse = httpClient.execute(httpget); 

     response = EntityUtils.toString(httpResponse.getEntity(), "UTF-8"); 
      Log.e("Login service", "resonse length : " + url); 


      if(response.length()>0){ 
       return true;//server available 
      }else{ 
       return false;//server not available 
      } 

      // this is what we extended for the getting the response string 
      // which we going to parese for out use in database // 


    } catch (Exception e1) { 
     // TODO Auto-generated catch block 
     e1.printStackTrace(); 
    } 
    return false;

來源

2014-02-11 06:12:14

感謝您的指導 – HemangNirmal

您可以簡單地聲明Socket。我在我的許多項目中使用了以下代碼，並且超時確實可行。

Socket socket; 
final String host = "your.server.IP.or.host"; 
final int port = 80; 
final int timeout = 30000; // 30 seconds 

try { 
    socket = new Socket(); 
    socket.connect(new InetSocketAddress(host, port), timeout); 
} 
catch (UnknownHostException uhe) { 
    Log.e("ServerSock", "I couldn't resolve the host you've provided!"); 
} 
catch (SocketTimeoutException ste) { 
    Log.e("ServerSock", "After a reasonable amount of time, I'm not able to connect, Server is probably down!"); 
} 
catch (IOException ioe) { 
    Log.e("ServerSock", "Hmmm... Sudden disconnection, probably you should start again!"); 
}

雖然這可能會很棘手。正確地在UnknownHostException之間，超時可能需要更長的時間，大約45秒 - 但另一方面，當您無法解析主機時，通常會發生這種情況，因此這更像是意味着您的Internet訪問配置了DNS配置錯誤（這是不太可能）。

無論如何，如果你想對衝你的賭注，你可以簡單地使用你的IP地址，而不是主機。這樣，如果有任何例外情況發生，您將確保這不是問題。

來源

2014-02-11 07:35:12 nKn

如何檢查服務器可用性的Android

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