List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
  for( WifiConfiguration i : list ) {
   if(i.SSID != null && i.SSID.equals(""" + networkSSID + """)) {
     wifiManager.disconnect();
     wifiManager.enableNetwork(i.networkId, true);
     wifiManager.reconnect();

     break;
  }
}