There are many times while creating an app that you want to take advantage of the different widths and heights of a phone in landscape mode and one in portrait mode. An easy way to do this is to load a different layout file when in each orientation.
The files in the default
layout directory (
ProjectName/res/layout) are used in both orientations, unless you add a
layout-land directory. Then all you have to do is put your customized landscape layout files in there and they will be loaded when the device switches to landscape mode.