Layouts are important because they directly affect the look and feel of your application. Technically, a layout is a view that arranges child views added to it. Android comes with a number of built-in layouts, ranging from LinearLayout, which is the easiest to use, to RelativeLayout, which is the most powerful.
This discusses the various layouts in Android.
An important Android component, a layout defines the visual structure of your UI components. A layout is a subclass of android.view.ViewGroup, which in turn derives from android.view.View. A ViewGroup is a special view that can contain other views. A layout can be declared in a layout file or added programmatically at runtime.
The following are some ...