//通过反射的方式去判断wifi是否已经连接上，并且可以开始传输数据
  private boolean checkWiFiConnectSuccess() {
    Class classType = WifiInfo.class;
    try {
      Object invo = classType.newInstance();
      Object result = invo.getClass().getMethod("getMeteredHint").invoke(invo);
      return (boolean) result;
    } catch (InstantiationException e) {
      e.printStackTrace();
      return false;
    } catch (IllegalAccessException e) {
      e.printStackTrace();
      return false;
    } catch (NoSuchMethodException e) {
      e.printStackTrace();
      return false;
    } catch (InvocationTargetException e) {
      e.printStackTrace();
      return false;
    }
  }