Explain the Architecture of Android ?

Top -> Applications (Contacts, Browser, Phone, etc) Below Applications -> Application Framework(Activity Manager, Window Manager, Content Providers, View System, Package manager,

 Telephony manager, Resource, Notification, Location managers) 

Below Application Framework -> System Libraries(Like Sqlite, webkit, SSL, OpenGL, Media Framework etc) & Android Runtime( Core Libraries and DVM).

 Atlast Last -> Linux Kernel (which composed of drivers like display, camera etc.)