I am working on a project and i have tested it on nexus one. its working there properly but I want that my project should be compatible with all screen sizes. How to do this
http://developer.android.com/guide/practices/screens_support.html
You have to add different folder for different layout in res folder --> hdpi,mdpi,ldpi and for large screens you xhdpi(for Tablet) and large-hdpi or xlarge (for NXzoom). Also set Images and text size different in different layout as per screensize...