question: public static boolean isConnected ( NetType netType , NetworkInfo networkInfo ) { if ( netType == NetType . Any && networkInfo != null && isConnected ( networkInfo ) ) return true ; else if ( netType == NetType . Wifi && networkInfo != null && networkInfo . getType ( ) == ConnectivityManager . TYPE_WIFI && isConnected ( networkInfo ) ) return true ; else if ( netType == NetType . Mobile && networkInfo != null && networkInfo . getType ( ) == ConnectivityManager . TYPE_MOBILE && isConnected ( networkInfo ) ) return true ; return false ; }
target:  According to the different type of network to determine whether the network connection.