Wifi or mobile (3G)

You want to detect which connection is to the internet. The following code can be used for this:

ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo niWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo niMobile = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
 
if (niWifi.isAvailable()){
   // wifi-connection existing
}
 
if (niMobile.isAvailable() == false) {
   // mobile-net existing
}