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iPaulPro/ItemTouchHelperAdapter.java Secret

Created June 23, 2015 16:10
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  1. iPaulPro created this gist Jun 23, 2015.
    57 changes: 57 additions & 0 deletions ItemTouchHelperAdapter.java
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    /*
    * 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);
    }