Access Network Information through an Android emulator

I have 开发者_Go百科an android emulator. I would like to develop an application to measure the signal strength (RSSI) from the Acess Point. I would like to poll the signal strength and update the metric about the signal strength.

I am using WifiManager. But as I run the application, I get the following output,

WIFI Status:SSID<none>,BSSID:<none>,MAC:<none>..

Is it possible to develop such an application.

Regards Chandra