set intent's display size and position it if it is possible

I'm new to android so I appreciate all the comments you have.

I want to call a new Intent from a BroadcastReceiver. Is it possible to set the displayed size of the new intent and position it?

Precisely, I would like to place a custom picture on top of the incoming call screen and still be able to answer or reject the call.

I could do it with toast, but it disappears after I while and I don't want that to happen.

Thanks in advance!