Views and Viewgroups
An activity contains Views and ViewGroups. A view is a widget that has an appearance on screen. Examples of views are buttons, labels, and text boxes. A view derives from the base class android.view.View.One or more views can be grouped together into a ViewGroup. A ViewGroup (which is itself a special type of view) provides the layout in which you can order the appearance and sequence of views. Examples of ViewGroups include LinearLayout and FrameLayout. A ViewGroup derives from the base class android.view.ViewGroup.
Views and Viewgroups
Android supports the following ViewGroups:➤ LinearLayout
➤ AbsoluteLayout
➤ TableLayout
➤ RelativeLayout
➤ FrameLayout
➤ ScrollView
The following sections describe each of these ViewGroups in more detail. Note that in practice it is common to combine different types of layouts to create the UI you want.
