Unable to connect with WIFI using wifiManger

I am trying to connect with specific wifi but it is not working. Whenever i call a below code, already connected wifi stop and phone showing a wifi in scanning mode. Can someone tell me why this is happening. Here is my code:

 String result = "";
    try {
        WifiConfiguration wifiConfig = new WifiConfiguration();
        wifiConfig.SSID = String.format("\"%s\"", ssid);
        WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);

        int netId = wifiManager.addNetwork(wifiConfig);
        wifiManager.disconnect();
        wifiManager.enableNetwork(netId, true);
        wifiManager.reconnect();
        int state = wifiManager.getWifiState();
        Log.i(TAG, "state: " + state);
        WifiInfo wifiInfo = wifiManager.getConnectionInfo();
        String newSSID = wifiInfo.getSSID();
        result = "Connected";
    } catch (Exception e) {
        result = "Failed";
        Log.e(TAG, "unable to set wifi " + ssid, e);
    }

I think you should not add SSID again. This code wifiManager.addNetwork(wifiConfig) is adding another wifi profile to your device.

You just need below code to reconnect

private boolean connectToWifi(String ssid) {
    WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    List<WifiConfiguration> wifiList = wifiManager.getConfiguredNetworks();
    for( WifiConfiguration config : wifiList ) {
        if(config.SSID != null && config.SSID.equals("\"" + ssid + "\"")) {
             wifiManager.disconnect();
             wifiManager.enableNetwork(config.networkId, true);
             wifiManager.reconnect();               
             return true;
        }           
    }
    return false;
}