public
static
interface
ItemTouchHelper.ViewDropHandler
| android.support.v7.widget.helper.ItemTouchHelper.ViewDropHandler |
 Known Indirect Subclasses
|
An interface which can be implemented by LayoutManager for better integration with
ItemTouchHelper.
Public methods | |
|---|---|
abstract
void
|
prepareForDrop(View view, View target, int x, int y)
Called by the |
void prepareForDrop (View view, 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 move operation.
For example, LinearLayoutManager sets up a "scrollToPositionWithOffset" calls so that the View under drag will be used as an anchor View while calculating the next layout, making layout stay consistent.
| Parameters | |
|---|---|
view |
View:
The View which is being dragged. It is very likely that user is still
dragging this View so there might be other
prepareForDrop(View, View, int, int) after this one. |
target |
View:
The target view which is being dropped on. |
x |
int:
The left offset of the View that is being dragged. This value
includes the movement caused by the user. |
y |
int:
The top offset of the View that is being dragged. This value
includes the movement caused by the user.
|
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