WifiManager mWifiManager=(WifiManager)getSystemService(Context.WIFI_SERVICE);

 WifiManager mWifiManager=(WifiManager)getSystemService(Context.WIFI_SERVICE);   List<WifiConfiguration> mWifiConfigurations = mWifiManager.getConfiguredNetworks(); for (WifiConfiguration mWifiConfiguration : mWifiConfigurations) {if (mWifiConfiguration.SSID.equals("\"free\"")) {int indexSSID = mWifiManager.addNetwork(mWifiConfiguration);boolean  isConnected = mWifiManager.enableNetwork(mWifiManager.getConfiguredNetworks().get(indexSSID).networkId, false);if(isConnected){  }}        }