I want modify below screen according to my option.
I don't know how to access this screen.
and i need to modify this screen also
Please help me to do this.
You cannot modify default screen but instead of this you can launch your screen for that you need to use BroadCastReceiver for incoming calls
here is the link for getting phone state in broadcast receiver
http://www.tutorialforandroid.com/2009/01/get-phone-state-when-someone-is-calling_22.html