ViewDropHandler unspecified API

```
public interface ItemTouchHelper.ViewDropHandler

                    
```
An interface which can be implemented by LayoutManager for better integration with ItemTouchHelper.

Method Summary

Modifier and Type	Method	Description
`abstract void`	`prepareForDrop(@NonNull() View view, @NonNull() View target, int x, int y)`	Called by the ItemTouchHelper after a View is dropped over another View.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - prepareForDrop
```
 abstract void prepareForDrop(@NonNull() View view, @NonNull() View target, int x, int y)
```
    Called by the ItemTouchHelper after a View is dropped over another View.
    A LayoutManager should implement this interface to get ready for the upcoming moveoperation.
    For example, LinearLayoutManager sets up a "scrollToPositionWithOffset" calls so thatthe View under drag will be used as an anchor View while calculating the next layout,making layout stay consistent.
    
    Parameters:
    
    view - The View which is being dragged.
    
    target - The target view which is being dropped on.
    
    x - The left offset of the View that is being dragged.
    
    y - The top offset of the View that is being dragged.