[android-developers] I want ot end the outgoing call programatically over a time

hi any one knows how to end the call and comeback to my code and run
the remaining code.how?
the code setResultsetData(null) is not ending the call.
String OUTGOING_CALL_ACTION =
"android.intent.action.NEW_OUTGOING_CALL";
string phnum=
intent.getExtras().getString(OutgoingCallReceiver.INTENT_PHONE_NUMBER);

the phnum taking null. but actually i want the ongoing call number.
can any one knows help me?

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