Android APIs
package

com.android.internal.widget

Interfaces

ActionBarOverlayLayout.ActionBarVisibilityCallback  
DecorContentParent Implemented by the top-level decor layout for a window. 
LockScreenWidgetCallback An interface used by LockScreenWidgets to send messages to lock screen. 
ResolverDrawerLayout.OnDismissedListener  
SwipeDismissLayout.OnDismissedListener  
SwipeDismissLayout.OnSwipeProgressChangedListener  
ViewPager.OnPageChangeListener Callback interface for responding to changing state of the selected page. 
ViewPager.PageTransformer A PageTransformer is invoked whenever a visible/attached page is scrolled. 

Classes

AbsActionBarView  
AbsActionBarView.VisibilityAnimListener  
ActionBarOverlayLayout Special layout for the containing of an overlay action bar (and its content) to correctly handle fitting system windows when the content has request that its layout ignore them. 
ActionBarOverlayLayout.LayoutParams  
AutoScrollHelper AutoScrollHelper is a utility class for adding automatic edge-triggered scrolling to Views. 
AutoScrollHelper.AbsListViewAutoScroller An implementation of AutoScrollHelper that knows how to scroll through an AbsListView
BackgroundFallback Helper class for drawing a fallback background in framework decor layouts. 
EditableInputConnection  
ExploreByTouchHelper ExploreByTouchHelper is a utility class for implementing accessibility support in custom Views that represent a collection of View-like logical items. 
FloatingToolbar A floating toolbar for showing contextual menu items. 
PagerAdapter Base class providing the adapter to populate pages inside of a ViewPager
PasswordEntryKeyboard A basic, embed-able keyboard designed for password entry. 
ResolverDrawerLayout  
ResolverDrawerLayout.LayoutParams  
ScrollingTabContainerView This widget implements the dynamic action bar tab behavior that can change across different configurations or circumstances. 
ScrollingTabContainerView.VisibilityAnimListener  
SubtitleView  
SwipeDismissLayout Special layout that finishes its activity when swiped away. 
ViewPager Layout manager that allows the user to flip left and right through pages of data. 
ViewPager.LayoutParams Layout parameters that should be supplied for views added to a ViewPager. 
ViewPager.SavedState This is the persistent state that is saved by ViewPager. 
ViewPager.SimpleOnPageChangeListener Simple implementation of the ViewPager.OnPageChangeListener interface with stub implementations of each method.