Working as an .NET developer since I know myself and just bought an Android phone and think have to learn something new would not hurt me whatsoever, start reading one of those reference development books “Hello Android” and just read 50 page in a hour and like the system more than anything I know
Now I got a problem, under UI development topic it says I am able to develop two UI one for portrait and other for landscape besides, it says those two main.xml files are separated by their suffix so If I want to support two mode have to have two main.xml files one of them would be separated from other with -land suffix. But not able to create a new main UI with land suffix please could you show me how could I able to create a new main.xml with -land suffix under Eclipse. If you explain with screen shots it could be much more expressive.
Take a look at: http://developer.android.com/guide/practices/screens_support.html for reference.
But what you actually do is create a new folder under your res. Called layout-land for landscape layouts. And then have the layout main in that folder.
See this catalogue structure: