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 35 public IconCache(Context context) { 36 mContext = context; 37 } 38 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 51 public void updateIcon(Icon icon, Drawable drawable) { 52 mMap.put(icon, drawable); 53 } 54 } 55
