how to get current wifi connection info in android

My (used to be) non-deprecated, modified approach to the current answer

https://developer.android.com/reference/android/net/ConnectivityManager#getActiveNetworkInfo()

public static String getCurrentSsid(Context context) {
        String ssid = null;
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = cm.getActiveNetworkInfo();
        if (networkInfo == null) {
            return null;
        }

        if (networkInfo.isConnected()) {
            final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
            final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
            if (connectionInfo != null && !StringUtil.isBlank(connectionInfo.getSSID())) {
                ssid = connectionInfo.getSSID();
            }
        }

    return ssid;
}

Update Android Oreo. You will also need to add ACCESS_FINE_LOCATION Permission in Manifest otherwise it will return unknown SSID

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>


 fun getCurrentSsid(context: Context): String {
            var ssid = "NA"
            val connManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
            val networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
            if (networkInfo.isConnected) {
                val wifiManager = context.getSystemService(Context.WIFI_SERVICE) as WifiManager
                val connectionInfo = wifiManager.connectionInfo
                if (connectionInfo != null && !connectionInfo.ssid.isEmpty()) {
                    ssid = connectionInfo.ssid
                }
            }
            return ssid
        }

Most probably you have already found answer: currentWifi.getSSID() is quoted in most cases where scanResult.SSID is not (and of course you must not use == on strings :)).

Try something like this, it returns current SSID or null:

public static String getCurrentSsid(Context context) {
  String ssid = null;
  ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
  if (networkInfo.isConnected()) {
    final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
    if (connectionInfo != null && !StringUtil.isBlank(connectionInfo.getSSID())) {
      ssid = connectionInfo.getSSID();
    }
  }
  return ssid;
}

also permissions are required:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

StringUtil is not a standard Android class, so you can use TextUtils instead. The code then looks like this:

public static String getCurrentSsid(Context context) {
  String ssid = null;
  ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
  if (networkInfo.isConnected()) {
    final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
    if (connectionInfo != null && !TextUtils.isEmpty(connectionInfo.getSSID())) {
      ssid = connectionInfo.getSSID();
    }
  }
  return ssid;
}