1 /*
2  * Copyright (C) 2018 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.android.settingslib.utils;
18 
19 import android.content.Context;
20 import android.graphics.drawable.Drawable;
21 import android.graphics.drawable.Icon;
22 
23 import androidx.annotation.VisibleForTesting;
24 import androidx.collection.ArrayMap;
25 
26 
27 /**
28  * Icon cache to avoid multiple loads on the same icon.
29  */
30 public class IconCache {
31     private final Context mContext;
32     @VisibleForTesting
33     final ArrayMap<Icon, Drawable> mMap = new ArrayMap<>();
34 
IconCache(Context context)35     public IconCache(Context context) {
36         mContext = context;
37     }
38 
getIcon(Icon icon)39     public Drawable getIcon(Icon icon) {
40         if (icon == null) {
41             return null;
42         }
43         Drawable drawable = mMap.get(icon);
44         if (drawable == null) {
45             drawable = icon.loadDrawable(mContext);
46             updateIcon(icon, drawable);
47         }
48         return drawable;
49     }
50 
updateIcon(Icon icon, Drawable drawable)51     public void updateIcon(Icon icon, Drawable drawable) {
52         mMap.put(icon, drawable);
53     }
54 }
55