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