How to check network strength

ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo Info = cm.getActiveNetworkInfo();
    if (Info == null || !Info.isConnectedOrConnecting()) {
        Log.i(TAG, "No connection");
    } else {
        int netType = Info.getType();
        int netSubtype = Info.getSubtype();

        if (netType == ConnectivityManager.TYPE_WIFI) {
            Log.i(TAG, "Wifi connection");
            WifiManager wifiManager = (WifiManager) getApplication().getSystemService(Context.WIFI_SERVICE);
            List<ScanResult> scanResult = wifiManager.getScanResults();
            for (int i = 0; i < scanResult.size(); i++) {
                Log.d("scanResult", "Speed of wifi"+scanResult.get(i).level);//The db level of signal 
            }

            // Need to get wifi strength
        } else if (netType == ConnectivityManager.TYPE_MOBILE) {
            Log.i(TAG, "GPRS/3G connection");
            // Need to get differentiate between 3G/GPRS
        }
    }

public class Connectivity {
       /*
        * These constants aren't yet available in my API level (7), but I need to
        * handle these cases if they come up, on newer versions
        */
       public static final int NETWORK_TYPE_EHRPD = 14; // Level 11
       public static final int NETWORK_TYPE_EVDO_B = 12; // Level 9
       public static final int NETWORK_TYPE_HSPAP = 15; // Level 13
       public static final int NETWORK_TYPE_IDEN = 11; // Level 8
       public static final int NETWORK_TYPE_LTE = 13; // Level 11

   /**
    * Check if there is any connectivity
    * 
    * @param context
    * @return
    */
   public static boolean isConnected(Context context) {
       ConnectivityManager cm = (ConnectivityManager) context
               .getSystemService(Context.CONNECTIVITY_SERVICE);
       NetworkInfo info = cm.getActiveNetworkInfo();
       return (info != null && info.isConnected());
   }

   /**
    * Check if there is fast connectivity
    * 
    * @param context
    * @return
    */
   public static String isConnectedFast(Context context) {
       ConnectivityManager cm = (ConnectivityManager) context
               .getSystemService(Context.CONNECTIVITY_SERVICE);
       NetworkInfo info = cm.getActiveNetworkInfo();

       if ((info != null && info.isConnected())) {
           return Connectivity.isConnectionFast(info.getType(),
                   info.getSubtype());
       } else
           return "No NetWork Access";

   }

   /**
    * Check if the connection is fast
    * 
    * @param type
    * @param subType
    * @return
    */
   public static String isConnectionFast(int type, int subType) {
       if (type == ConnectivityManager.TYPE_WIFI) {
           System.out.println("CONNECTED VIA WIFI");
           return "CONNECTED VIA WIFI";
       } else if (type == ConnectivityManager.TYPE_MOBILE) {
           switch (subType) {
           case TelephonyManager.NETWORK_TYPE_1xRTT:
               return "NETWORK TYPE 1xRTT"; // ~ 50-100 kbps
           case TelephonyManager.NETWORK_TYPE_CDMA:
               return "NETWORK TYPE CDMA (3G) Speed: 2 Mbps"; // ~ 14-64 kbps
           case TelephonyManager.NETWORK_TYPE_EDGE:

               return "NETWORK TYPE EDGE (2.75G) Speed: 100-120 Kbps"; // ~
                                                                       // 50-100
                                                                       // kbps
           case TelephonyManager.NETWORK_TYPE_EVDO_0:
               return "NETWORK TYPE EVDO_0"; // ~ 400-1000 kbps
           case TelephonyManager.NETWORK_TYPE_EVDO_A:
               return "NETWORK TYPE EVDO_A"; // ~ 600-1400 kbps
           case TelephonyManager.NETWORK_TYPE_GPRS:
               return "NETWORK TYPE GPRS (2.5G) Speed: 40-50 Kbps"; // ~ 100
                                                                       // kbps
           case TelephonyManager.NETWORK_TYPE_HSDPA:
               return "NETWORK TYPE HSDPA (4G) Speed: 2-14 Mbps"; // ~ 2-14
                                                                   // Mbps
           case TelephonyManager.NETWORK_TYPE_HSPA:
               return "NETWORK TYPE HSPA (4G) Speed: 0.7-1.7 Mbps"; // ~
                                                                       // 700-1700
                                                                       // kbps
           case TelephonyManager.NETWORK_TYPE_HSUPA:
               return "NETWORK TYPE HSUPA (3G) Speed: 1-23 Mbps"; // ~ 1-23
                                                                   // Mbps
           case TelephonyManager.NETWORK_TYPE_UMTS:
               return "NETWORK TYPE UMTS (3G) Speed: 0.4-7 Mbps"; // ~ 400-7000
                                                                   // kbps
               // NOT AVAILABLE YET IN API LEVEL 7
           case Connectivity.NETWORK_TYPE_EHRPD:
               return "NETWORK TYPE EHRPD"; // ~ 1-2 Mbps
           case Connectivity.NETWORK_TYPE_EVDO_B:
               return "NETWORK_TYPE_EVDO_B"; // ~ 5 Mbps
           case Connectivity.NETWORK_TYPE_HSPAP:
               return "NETWORK TYPE HSPA+ (4G) Speed: 10-20 Mbps"; // ~ 10-20
                                                                   // Mbps
           case Connectivity.NETWORK_TYPE_IDEN:
               return "NETWORK TYPE IDEN"; // ~25 kbps
           case Connectivity.NETWORK_TYPE_LTE:
               return "NETWORK TYPE LTE (4G) Speed: 10+ Mbps"; // ~ 10+ Mbps
               // Unknown
           case TelephonyManager.NETWORK_TYPE_UNKNOWN:
               return "NETWORK TYPE UNKNOWN";
           default:
               return "";
           }
       } else {
           return "";
       }
   }

}