mirror of https://github.com/NekoX-Dev/NekoX.git
58 lines
2.0 KiB
Java
58 lines
2.0 KiB
Java
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package androidx.recyclerview.widget;
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import androidx.annotation.Nullable;
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/**
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* An interface that can receive Update operations that are applied to a list.
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* <p>
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* This class can be used together with DiffUtil to detect changes between two lists.
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*/
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public interface ListUpdateCallback {
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/**
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* Called when {@code count} number of items are inserted at the given position.
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*
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* @param position The position of the new item.
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* @param count The number of items that have been added.
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*/
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void onInserted(int position, int count);
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/**
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* Called when {@code count} number of items are removed from the given position.
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*
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* @param position The position of the item which has been removed.
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* @param count The number of items which have been removed.
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*/
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void onRemoved(int position, int count);
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/**
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* Called when an item changes its position in the list.
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*
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* @param fromPosition The previous position of the item before the move.
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* @param toPosition The new position of the item.
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*/
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void onMoved(int fromPosition, int toPosition);
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/**
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* Called when {@code count} number of items are updated at the given position.
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*
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* @param position The position of the item which has been updated.
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* @param count The number of items which has changed.
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*/
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void onChanged(int position, int count, @Nullable Object payload);
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}
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