Wifi Connection Manager

Just need some help on Android...I just want to know the basic steps in creating an application that would enable detection of all the WiFi networks in a given area and es开发者_运维知识库tablishing connection with the desired WiFi network and also disconnecting it as and when required...

I would like to learn it on my own but would appreciate anyone providing with source codes...

The key class to use would be the WifiManager. The documentation can be found here: http://developer.android.com/reference/android/net/wifi/WifiManager.html.