如何连接上AccessPoint，WifiManager.connect_yu_zongyao的专栏

    /**
     * Connect to a network with the given configuration. The network also
     * gets added to the supplicant configuration.
     *
     * For a new network, this function is used instead of a
     * sequence of addNetwork(), enableNetwork(), saveConfiguration() and
     * reconnect()
     *
     * @param config the set of variables that describe the configuration,
     *            contained in a {@link WifiConfiguration} object.
     * @param listener for callbacks on success or failure. Can be null.
     * @throws IllegalStateException if the WifiManager instance needs to be
     * initialized again
     *
     * @hide
     */
    public void connect(WifiConfiguration config, ActionListener listener) {
        if (config == null) throw new IllegalArgumentException("config cannot be null");
        validateChannel();
        // Use INVALID_NETWORK_ID for arg1 when passing a config object
        // arg1 is used to pass network id when the network already exists
        sAsyncChannel.sendMessage(CONNECT_NETWORK, WifiConfiguration.INVALID_NETWORK_ID,
                putListener(listener), config);
    }    /**
     * Connect to a network with the gi