Prerequisites :
1. Working Eclipse IDE with ADT installed (Tutorial)
2. Basics of Java

Part 1: Understanding Views
Start a new Android Project. File >> New >> Android Project.
Major Components of the new Android Project screen are
Project Name : Just the name displayed in Eclipse
Build Target : Supported Version, We chose to build for Android 2.2
Application Name : Name Displayed in the Application Header
Package Name : Follow the international reverse hierarchy nomenclature as in java packages (can be anything)
Create Activity… :  Keeping activity checked will create a java file in the “src” folder which will have a function that will be called as soon as the application starts.

Hello World is typically the simplest program to write in programming languages. It is considered as the first and basic step towards mastering the language.
Let us make an App which does nothing but displays “Hello World!” .
There is a detailed tutorial on the Android Developer site along-with basic troubleshooting.…