How to avoid duplicating of WiFi networks in standard android WiFi list?

In my android app I connect to WiFi network. But, for example, if I connect to this network plenty of times, name of this network appears in standard android WiFi list plenty of times. How can I avoid this?

My code:

String networkSSID = "test"; 
String networkPass = "pass";
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"" + networkSSID + "\"";  
conf.preSharedKey = "\""+ networkPass +"\"";
WifiManager wifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE); 
wifiManager.addNetwork(conf);

I'll add a screenshot as soon as possible

Solution

Don't call addNetwork if the Network already exists! You can find that out by iterating over the getConfiguredNetworksfrom WifiManager.

If the Network already exists, just connect to it.

for (WifiConfiguration config : wifiManager.getConfiguredNetworks()) {
   String newSSID = config.SSID;

   if (myNetworksSSID.equals(newSSID)) {
      wifiManager.disconnect();
      wifiManager.enableNetwork(config.networkId, true);
      wifiManager.reconnect();

     return;
   }
 }

 ...
 addNetwork(conf); //your old code