lib-manipulation/src/main/java/com/nhaarman/listviewanimations/itemmanipulation/dragdrop/DragAndDropHandler.java
private boolean handleDownEvent(@NonNull final MotionEvent event) {
        mDownX = event.getRawX();
        mDownY = event.getRawY();
        return true;
    }
private boolean handleDownEvent(@NonNull final MotionEvent event) {
        mDownX = event.getRawX();
        mDownY = event.getRawY();
        return true;
    }
Handles the down event.
<p/>
Finds the position and {@code View} of the touch point and, if allowed by the {@link com.nhaarman.listviewanimations.itemmanipulation.dragdrop.DraggableManager},
starts dragging the {@code View}.

@param event the {@link android.view.MotionEvent} that was triggered.

@return {@code true} if we have started dragging, {@code false} otherwise.