1 /*
2  * Copyright (C) 2015 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 package com.google.android.setupdesign.items;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 
22 /**
23  * Abstract implementation of an item, which implements {@link IItem} and takes care of implementing
24  * methods for {@link ItemHierarchy} for items representing itself.
25  */
26 public abstract class AbstractItem extends AbstractItemHierarchy implements IItem {
27 
AbstractItem()28   public AbstractItem() {
29     super();
30   }
31 
AbstractItem(Context context, AttributeSet attrs)32   public AbstractItem(Context context, AttributeSet attrs) {
33     super(context, attrs);
34   }
35 
36   @Override
getCount()37   public int getCount() {
38     return 1;
39   }
40 
41   @Override
getItemAt(int position)42   public IItem getItemAt(int position) {
43     return this;
44   }
45 
46   @Override
findItemById(int id)47   public ItemHierarchy findItemById(int id) {
48     if (id == getId()) {
49       return this;
50     }
51     return null;
52   }
53 
54   /**
55    * Convenience method to notify the adapter that the contents of this item has changed. This only
56    * includes non-structural changes. Changes that causes the item to be removed should use the
57    * other notification methods.
58    *
59    * @see #notifyItemRangeChanged(int, int)
60    * @see #notifyItemRangeInserted(int, int)
61    * @see #notifyItemRangeRemoved(int, int)
62    */
notifyItemChanged()63   public void notifyItemChanged() {
64     notifyItemRangeChanged(0, 1);
65   }
66 }
67