Import the net.rim.device.api.system.WLANInfo class.
if (WLANInfo.getWLANState() == WLANInfo.WLAN_STATE_CONNECTED) {…}
需要jde4.3及以上
原帖地址
http://docs.blackberry.com/en/developers/deliverables/9137/Check_if_the_WiFi_transceiver_is_connected_509030_11.jsp