Latest Android 4.0.4 build for 2011 Xperia devices leaked

The latest Sony test Android 4.0.4 firmware build for 2011 Xperia devices has leaked over at xda-developers. It is apparently a port of the Xperia pro release and works with the stock kernel and latest baseband. It hopefully suggests that Sony Mobile is working on an Android 4.0.4 update at some point down the road for the 2011 Xperia devices.
The firmware is provided as it is, so you should expect bugs if you decide to use it. The version offered is pre-rooted and includes Busybox. You can find all of the information

More Details Available At
XDA-Devlopers

Detail Of Android Stack

To begin programing with android all new programers have to know some basic things that will help them for lifetime.

1) Android Stack. Its just a view of how the OS works/build and process all the request. Android is based on linux kernel, so who r familiar with Linux will get a good amount of help. Android uses Linux for the Hardware and security. But if u don't know Linux don't worry, Java is here to help you. All android apps are written in java. So if u wanna start android Programing first learn OOPS basic and JAVA. And for ROM designing, A hardcore knowledge of Linux and ANSI C(In which UNIX) is written. Happy Programing.