1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 */ 17 18 package com.android.settings.search; 19 20 import android.support.v7.util.DiffUtil; 21 22 import java.util.List; 23 24 /** 25 * Callback for DiffUtil to elegantly update search data when the query changes. 26 */ 27 public class SearchResultDiffCallback extends DiffUtil.Callback { 28 29 private List<SearchResult> mOldList; 30 private List<SearchResult> mNewList; 31 32 public SearchResultDiffCallback(List<SearchResult> oldList, List<SearchResult> newList) { 33 mOldList = oldList; 34 mNewList = newList; 35 } 36 37 @Override 38 public int getOldListSize() { 39 return mOldList.size(); 40 } 41 42 @Override 43 public int getNewListSize() { 44 return mNewList.size(); 45 } 46 47 @Override 48 public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) { 49 return mOldList.get(oldItemPosition).equals(mNewList.get(newItemPosition)); 50 } 51 52 @Override 53 public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) { 54 return mOldList.get(oldItemPosition).equals(mNewList.get(newItemPosition)); 55 } 56 } 57
