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SwipeRefreshLayout.OnChildScrollUpCallback Classes that wish to override SwipeRefreshLayout.canChildScrollUp() method behavior should implement this interface. 
SwipeRefreshLayout.OnRefreshListener Classes that wish to be notified when the swipe gesture correctly triggers a refresh should implement this interface. 


CircularProgressDrawable Drawable that renders the animated indeterminate progress indicator in the Material design style without depending on API level 11. 
SwipeRefreshLayout The SwipeRefreshLayout should be used whenever the user can refresh the contents of a view via a vertical swipe gesture.