how to turn internet connection (GPRS/EDGE/3G) on/off

I am trying to turn off the 开发者_StackOverflow中文版internet connectivity thru android app like GPRS/EDGE/3G. When needed I need to turn on the same. But I could not find how to do that.

What is the API which supports this. Please help me.

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Thanks to Sarwar Erfan

"This project does what you want to do. Review code of this project: code.google.com/p/apndroid – Sarwar Erfan"

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Did you try putting the phone on airline mode? It should stop all incoming and outgoing data, phone calls but still let the user play around with data/applications already on the phone.

You can check the settings that deal with putting a phone on airline mode here.

HTH,
Sriram