Android - 判断当前是否使用的是Wifi网络

// 判断当前是否使用的是 WIFI网络  
    public static boolean isWifiActive(Context icontext){
        Context context = icontext.getApplicationContext();    
        ConnectivityManager connectivity = (ConnectivityManager) context    
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo[] info;
        if (connectivity != null) {    
            info = connectivity.getAllNetworkInfo();    
            if (info != null) {    
                for (int i = 0; i < info.length; i++) {    
                    if (info[i].getTypeName().equals("WIFI") && info[i].isConnected()) {    
                        return true;    
                    }    
                }    
            }    
        }    
        return false;   
    }