How to invoke a phone call in ANDROID?

The following code helps you to invoke a phone call in ANDROID without any user interaction.
This code uses intent to start the activity.
You know that intent can be used to start another acitivty from with in an application.

Dialing a number is done using this code…

Uri telephoneUri = Uri.parse("tel:100000");
my_intent = new Intent(Intent.ACTION_DIAL, telephoneUri);

and Calling number using

Uri calling = Uri.parse("tel:100000");
the_call = new Intent(Intent.ACTION_CALL, calling);