title: Android how to get wifi signal strength and connection subType
body: <p>i i am checking network type by calling this function</p>
  
  <pre><code>        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");
                  //Need to get wifi strength
              } else if (netType == ConnectivityManager.TYPE_MOBILE) {
                Log.i(TAG, "GPRS/3G connection"); 
                 //Need to get differentiate between 3G/GPRS
              } 
          }
  </code></pre>
  
  <p>i do not want to poll wifi strength regularly,but when i do some network stuff i need to check connected wifi strength which i am unable to get.
  Secondly when i get netType() as MOBILE how can i determine its 3G/GPRS form netSubType, i mean what are the integer values for 3g/Gprs etc.</p>
  
  <p>Please anyone have idea how to do this.</p>
  
  <p>Thanks </p>