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Interface to listen for drag and swipe events from an ItemTouchHelper.Callback
/*
* Copyright (C) 2015 Paul Burke
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package co.paulburke.android.itemtouchhelperdemo.helper;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;
/**
* Interface to listen for a move or dismissal event from a {@link ItemTouchHelper.Callback}.
*
* @author Paul Burke (ipaulpro)
*/
public interface ItemTouchHelperAdapter {
/**
* Called when an item has been dragged far enough to trigger a move. This is called every time
* an item is shifted, and <strong>not</strong> at the end of a "drop" event.<br/>
* <br/>
* Implementations should call {@link RecyclerView.Adapter#notifyItemMoved(int, int)} after
* adjusting the underlying data to reflect this move.
*
* @param fromPosition The start position of the moved item.
* @param toPosition Then resolved position of the moved item.
*
* @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
* @see RecyclerView.ViewHolder#getAdapterPosition()
*/
void onItemMove(int fromPosition, int toPosition);
/**
* Called when an item has been dismissed by a swipe.<br/>
* <br/>
* Implementations should call {@link RecyclerView.Adapter#notifyItemRemoved(int)} after
* adjusting the underlying data to reflect this removal.
*
* @param position The position of the item dismissed.
*
* @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
* @see RecyclerView.ViewHolder#getAdapterPosition()
*/
void onItemDismiss(int position);
}
@mtychyna

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commented Jan 18, 2016

void onItemDismiss(int position);
should return boolean?
the same in article

@scottbiggs

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commented Jul 19, 2016

Nicely commented! It's a sad state of affairs that documentarian like you are the exception instead of the rule.

@ArthurInTheShell

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commented Apr 3, 2018

Thanks! It has been really helpful.

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