| AbsListView | 
                    
                       Base class that can be used to implement virtualized lists of items. 
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                    | AbsSpinner | 
                    
                       An abstract base class for spinner widgets. 
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                    | AbsoluteLayout | 
                    
                       A layout that lets you specify exact locations (x/y coordinates) of its children. 
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                    | ActionMenuView | 
                    
                       ActionMenuView is a presentation of a series of menu options as a View. 
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                    | AdapterView | 
                    
                       An AdapterView is a view whose children are determined by an Adapter. 
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                    | AdapterViewAnimator | 
                    
                       Base class for a AdapterView that will perform animations when switching between its views. 
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                    | AdapterViewFlipper | 
                    
                       Simple ViewAnimator that will animate between two or more views that have been added to it. 
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                    | AppWidgetHostView | 
                    
                       Provides the glue to show AppWidget views. 
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                    | CalendarView | 
                    
                       This class is a calendar widget for displaying and selecting dates. 
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                    | DatePicker | 
                    
                       Provides a widget for selecting a date. 
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                    | DialerFilter | 
                    
                       This widget is a layout that contains several specifically-named child views that handle keyboard entry interpreted as standard phone dialpad digits. 
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                    | ExpandableListView | 
                    
                       A view that shows items in a vertically scrolling two-level list. 
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                    | FragmentBreadCrumbs | 
                    
                       Helper class for showing "bread crumbs" representing the fragment stack in an activity. 
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                    | FrameLayout | 
                    
                       FrameLayout is designed to block out an area on the screen to display a single item. 
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                    | Gallery | 
                    
                       A view that shows items in a center-locked, horizontally scrolling list. 
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                    | GestureOverlayView | 
                    
                       A transparent overlay for gesture input that can be placed on top of other widgets or contain other widgets. 
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                    | GridLayout | 
                    
                       A layout that places its children in a rectangular grid. 
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                    | GridView | 
                    
                       A view that shows items in two-dimensional scrolling grid. 
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                    | HorizontalScrollView | 
                    
                       Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display. 
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                    | ImageSwitcher | 
                    
                       ViewSwitcher that switches between two ImageViews when a new image is set on it. 
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                    | InlineContentView | 
                    
                       This class represents a view that holds opaque content from another app that you can inline in your UI. 
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                    | LinearLayout | 
                    
                       A layout that arranges other views either horizontally in a single column or vertically in a single row. 
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                    | ListView | 
                    
                       Displays a vertically-scrollable collection of views, where each view is positioned immediately below the previous view in the list. 
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                    | MediaController | 
                    
                       A view containing controls for a MediaPlayer. 
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                    | NumberPicker | 
                    
                       A widget that enables the user to select a number from a predefined range. 
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                    | RadioGroup | 
                    
                       This class is used to create a multiple-exclusion scope for a set of radio buttons. 
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                    | RelativeLayout | 
                    
                       A Layout where the positions of the children can be described in relation to each other or to the parent. 
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                    | ScrollView | 
                    
                       A view group that allows the view hierarchy placed within it to be scrolled. 
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                    | SearchView | 
                    
                       A widget that provides a user interface for the user to enter a search query and submit a request to a search provider. 
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                    | SlidingDrawer | 
                    
                       SlidingDrawer hides content out of the screen and allows the user to drag a handle to bring the content on screen. 
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                    | Spinner | 
                    
                       A view that displays one child at a time and lets the user pick among them. 
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                    | SplashScreenView | 
                    
                       The view which allows an activity to customize its splash screen exit animation. 
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                    | StackView | 
                    
                      
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                    | TabHost | 
                    
                       Container for a tabbed window view. 
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                    | TabWidget | 
                    
                       Displays a list of tab labels representing each page in the parent's tab collection. 
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                    | TableLayout | 
                    
                       A layout that arranges its children into rows and columns. 
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                    | TableRow | 
                    
                       A layout that arranges its children horizontally. 
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                    | TextSwitcher | 
                    
                       Specialized android.widget.ViewSwitcher that contains only children of type android.widget.TextView. 
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                    | TimePicker | 
                    
                       A widget for selecting the time of day, in either 24-hour or AM/PM mode. 
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                    | Toolbar | 
                    
                       A standard toolbar for use within application content. 
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                    | TvAdView | 
                    
                       Displays contents of TV advertisement services. 
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                    | TvInteractiveAppView | 
                    
                       Displays contents of interactive TV applications. 
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                    | TvView | 
                    
                       Displays TV contents. 
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                    | TwoLineListItem | 
                    
                       A view group with two children, intended for use in ListViews. 
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                    | ViewAnimator | 
                    
                       Base class for a FrameLayout container that will perform animations when switching between its views. 
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                    | ViewFlipper | 
                    
                       Simple ViewAnimator that will animate between two or more views that have been added to it. 
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                    | ViewSwitcher | 
                    
                       ViewAnimator that switches between two views, and has a factory from which these views are created. 
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                    | WebView | 
                    
                       A View that displays web pages. 
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                    | ZoomControls | 
                    
                       The ZoomControls class displays a simple set of controls used for zooming and provides callbacks to register for events. 
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