现在Android的主流sdk版本已经达到4.3了，有很多Android的新控件不断的推出，我在此进行汇总，学习一下：
新增控件：
CalendarView
GridLayout
RecyclerView
AppWidgetHostView
SwipeRefreshLayout
SlidingPaneLayout
DrawerLayout
NestedScrollView
Switch
PagerTitleStrip
NoSaveStateFrameLayout
MySearchView
ViewSwitcher
StackView
SearchView
KeyboardView