tree 292846bd8e828474c55c7cb2ef949c226d060e80
parent 15ed8b2c8a943d9aa3d01662b3052f8989ca3a09
author Ben Lin <linben@google.com> 1488929836 -0800
committer Ben Lin <linben@google.com> 1489184722 -0800

Fix a bug where dropping on Root never works.

DragEvent gets recycled, so by passing a DragEvent reference directly to
ActionHandler#dropOn, by the time the callback occurs, DragEvent is
updated to ACTION_DRAG_ENDED. ACTION_DRAG_ENDED events have no ClipData
and no localState, so the file operation never will occur.

Also added tests that involved ... refactoring lots of things.

Change-Id: I87daf1a4ec4e536701e03fd6dc53fc55829e5e51