有时候主动连接不是第一个在列表中，或者处于非活动状态或处于错误状态。这是我会怎么做：

Sometimes the active connection is not first in the list, or is inactive or in an error state. This is how I would do it:

  NetworkInfo i = conMgr.getActiveNetworkInfo();
  if (i == null)
    return false;
  if (!i.isConnected())
    return false;
  if (!i.isAvailable())
    return false;
  return true;

请不要忘记添加此权限的应用程序清单：

Don't forget to add this permission in the application manifest:

  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

这是否帮助你？

Does this help you?

灵光