Hello I am newbie to android Programming

First What is Android just follow the link:http://en.wikipedia.org/wiki/Android_(operating_system)

Development Environment:

-------------------------------------
Minimum requirements for developing a sample android application are as follows:
Java 1.6 Eclipse Galileo  Android SDK
You can download the Android SDK from the following link with respective OS:http://developer.android.com/sdk/index.html
Install the ADT Plugin for Eclipse
If you are developing in Eclipse, set up a remote update site at https://dl-ssl.google.com/android/eclipse/. Install the Android Development Tools (ADT) Plugin, restart Eclipse, and set the "Android" preferences in Eclipse to point to the SDK install location. For detailed instructions, see ADT Plugin for Eclipse.
Procedure for downloading plugins:

-----------------------------------------------------

Start Eclipse, then select Help > Install New Software.

In the Available Software dialog, click Add....

In the Add Site dialog that appears, enter a name for the remote site (for example, "Android Plugin") in the "Name" field.In the "Location" field, enter this URL:https://dl-ssl.google.com/android/eclipse/Note: If you have trouble acquiring the plugin, you can try using "http" in the URL, instead of "https" (https is preferred for security reasons).

Click OK.Back in the Available Software view, you should now see "Developer Tools" added to the list. Select the checkbox next to Developer Tools, which will automatically select the nested tools Android DDMS and Android Development Tools.

Click Next.In the resulting Install Details dialog, the Android DDMS and Android Development Tools features are listed. Click Next to read and accept the license agreement and install any dependencies, then click Finish.Restart Eclipse.

So you are ready to develop the Android Programs
At first you have to set the Android RunTime :-
Goto Eclipse Window tab-> Preferences ->set the Android SDK location (downloaded of the Android sdk system path).
Android SDK and AVD Manger(Android Emulator):
After Successfull installation of Android plugins you can see a icon with a down arrow (i.e, Android SDK and AVD console)on click it opens the list of existing AVD (Android Virtual Device ) if not you can create a new AVD by selecting the New button.There you can give the AVD name and selecting the target as android version (1.5,2.1,2.2..,)In Hardware there are certain options that supports the Android Emulator.After giving all details mentioned you can start the Device by pressing Launch button to open the Android Emulator.

There is a DDMS(Dalvik Debug Monitoring Service) prespetive to open the LogCat of Android,FileExplorer view etc.,

This above process is to configure the Android Environment.

Thanks & Regards

Vinay Guntaka

Software Engineer