问Android应用程序在4G互联网连接上崩溃，但仅在GSM模式下工作正常

EN

public static boolean checkNetworkRechability(Context context) {
        Boolean bNetwork = false;
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        for (NetworkInfo networkInfo : connectivityManager.getAllNetworkInfo()) {
            int netType = networkInfo.getType();
            int netSubType = networkInfo.getSubtype();

            if (netType == ConnectivityManager.TYPE_WIFI) {
                bNetwork = networkInfo.isConnected();
                if (bNetwork == true)
                    break;
            } else if (netType == ConnectivityManager.TYPE_MOBILE && netSubType != TelephonyManager.NETWORK_TYPE_UNKNOWN) {
                bNetwork = networkInfo.isConnected();
                if (bNetwork == true)
                    break;
            } else {
                bNetwork = false;
            }
        }
        if (!bNetwork) {
            Log.i(TAG, "You are not in network");
        }
        Log.i(TAG, "bNetwork : " + bNetwork);
        return bNetwork;
    }