判断网络

public static final int NETTYPE_WIFI = 0x01;



    public static final int NETTYPE_CMWAP = 0x02;



    public static final int NETTYPE_CMNET = 0x03;



    public int getNetworkType() {



        int netType = 0;



        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);



        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();



        if (networkInfo == null) {



            return netType;



        }        



        int nType = networkInfo.getType();



        if (nType == ConnectivityManager.TYPE_MOBILE) {



            String extraInfo = networkInfo.getExtraInfo();



            if(extraInfo!=null){



                if (extraInfo.toLowerCase().equals("cmnet")) {



                    netType = NETTYPE_CMNET;



                } else {



                    netType = NETTYPE_CMWAP;



                }



            }



        } else if (nType == ConnectivityManager.TYPE_WIFI) {



            netType = NETTYPE_WIFI;



        }



        return netType;



    }