android WIFi 连接状态之DetailedState

 public enum DetailedState {
        /** Ready to start data connection setup. */
        IDLE,
        /** Searching for an available access point. */
        SCANNING,
        /** Currently setting up data connection. */
        CONNECTING,
        /** Network link established, performing authentication. */
        AUTHENTICATING,
        /** Awaiting response from DHCP server in order to assign IP address information. */
        OBTAINING_IPADDR,
        /** IP traffic should be available. */
        CONNECTED,
        /** IP traffic is suspended */
        SUSPENDED,
        /** Currently tearing down data connection. */
        DISCONNECTING,
        /** IP traffic not available. */
        DISCONNECTED,
        /** Attempt to connect failed. */
        FAILED,
        /** Access to this network is blocked. */
        BLOCKED,
        /** Link has poor connectivity. */
        VERIFYING_POOR_LINK,
        /** Checking if network is a captive portal */
        CAPTIVE_PORTAL_CHECK
    }

IDLE：空闲
SCANNING：正在扫描
CONNECTING：连接中
AUTHENTICATING：正在进行身份验证...
OBTAINING_IPADDR：正在获取Ip地址
CONNECTED：已连接
SUSPENDED：已暂停
DISCONNECTING：正在断开连接...
DISCONNECTED：已断开
FAILED：失败
BLOCKED：已阻止
VERIFYING_POOR_LINK：暂时关闭（网络状况不佳）
CAPTIVE_PORTAL_CHECK：判断是否需要浏览器二次登录（本人用6.0手机试了，好像不会走到这一步）
关于 CAPTIVE_PORTAL_CHECK的解释，这里有一篇文章

http://www.sjsjw.com/kf_mobile/article/030399ABA001670.asp

android 系统把CONNECTING，AUTHENTICATING，OBTAINING_IPADDR都规为CONNECTING

  stateMap.put(DetailedState.IDLE, State.DISCONNECTED);
        stateMap.put(DetailedState.SCANNING, State.DISCONNECTED);
        stateMap.put(DetailedState.CONNECTING, State.CONNECTING);
        stateMap.put(DetailedState.AUTHENTICATING, State.CONNECTING);
        stateMap.put(DetailedState.OBTAINING_IPADDR, State.CONNECTING);
        stateMap.put(DetailedState.VERIFYING_POOR_LINK, State.CONNECTING);
        stateMap.put(DetailedState.CAPTIVE_PORTAL_CHECK, State.CONNECTING);
        stateMap.put(DetailedState.CONNECTED, State.CONNECTED);
        stateMap.put(DetailedState.SUSPENDED, State.SUSPENDED);
        stateMap.put(DetailedState.DISCONNECTING, State.DISCONNECTING);
        stateMap.put(DetailedState.DISCONNECTED, State.DISCONNECTED);
        stateMap.put(DetailedState.FAILED, State.DISCONNECTED);
        stateMap.put(DetailedState.BLOCKED, State.DISCONNECTED);