/**

     * 检测网络是否可用

     * @return

     */

    public boolean isNetworkConnected() {

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

        NetworkInfo ni = cm.getActiveNetworkInfo();

        return ni != null && ni.isConnectedOrConnecting();

    }

    /**

     * 获取当前网络类型

     * @return 0：没有网络   1：WIFI网络   2：WAP网络    3：NET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(!StringUtils.isEmpty(extraInfo)){

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

                    netType = NETTYPE_CMNET;

                } else {

                    netType = NETTYPE_CMWAP;

                }

            }

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

            netType = NETTYPE_WIFI;

        }

        return netType;

    }