As you must be aware, there is no single District Collector for Andhra Pradesh. The District Collector is an individual who serves a district of his appointment within the state.
In Andhra Pradesh, there are twenty three districts and I can give you the names of the District Collectors of the more prominent districts:
Chittoor: Shamsher Singh Rawat
Guntur: G. Jayalakshmi
Hyderabad and Secunderabad: R V Chandravadan
Nellore: M Ravichandra
Vishakapatnam: A K Singhal
Warangal: K Damayanti
Hopefully this will have answered your question and if not a quick search on the Internet should help you out more and confirm what I have said here.
In Andhra Pradesh, there are twenty three districts and I can give you the names of the District Collectors of the more prominent districts:
Chittoor: Shamsher Singh Rawat
Guntur: G. Jayalakshmi
Hyderabad and Secunderabad: R V Chandravadan
Nellore: M Ravichandra
Vishakapatnam: A K Singhal
Warangal: K Damayanti
Hopefully this will have answered your question and if not a quick search on the Internet should help you out more and confirm what I have said here.