WiFi scanning in Android programming (specify channel and active/passive)

mWifiManager.startScanActive() and mWifiManager.startScan():
-Passive scanning listens to beacons sent by the access points. That means waiting for the beacon to be sent (usually a few seconds).
-An active scanning will emit probes to those APs immediately.
[ref: http://stackoverflow.com/questions/5958715/what-is-the-difference-between-active-scan-and-passive-scan]

see also: http://developer.android.com/reference/android/net/wifi/WifiManager.html

hope it helps

You didn't really specify what language or IDE you're using, which would help if you want working code samples.

Hi Guys, sorry for the late reply.  Was having computer issues and haven't got a chance to code.  I am using Eclipse SDK.  Thank you.

Thanks Molnar, I will test as soon as I can get the laptop back running.

The links supplied are both for Java, if I'm not mistaken.

The only Eclipse IDE that I know of uses C/C++... so you might want to ask the administrators to add the C++ topic area for you. (i.e. click the Request Attention link under your original question.)

Hi Guys, finally got the pc running and Eclipse reinstalled.  I have read the link Molnar supplied before and I've tried it again.  The problem is that Eclipse wouldn't compile mywifi.startScanActive() because the method is not part of the SDK.  This is where I got stuck and Google is not producing much help.

http://stackoverflow.com/questions/6234728/missing-method-in-android-net-wifi-wifimanager

Also, the phone must be rooted which is not practical.

Can't be done using Eclipse SDK