Alan Viverette | e54d245 | 2015-05-06 10:41:43 -0700 | [diff] [blame] | 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 android.content.res; |
| 18 | |
Mathew Inwood | 5c0d354 | 2018-08-14 13:54:31 +0100 | [diff] [blame] | 19 | import android.annotation.UnsupportedAppUsage; |
Alan Viverette | e54d245 | 2015-05-06 10:41:43 -0700 | [diff] [blame] | 20 | import android.graphics.drawable.Drawable; |
| 21 | |
| 22 | /** |
| 23 | * Class which can be used to cache Drawable resources against a theme. |
| 24 | */ |
| 25 | class DrawableCache extends ThemedResourceCache<Drawable.ConstantState> { |
Alan Viverette | e54d245 | 2015-05-06 10:41:43 -0700 | [diff] [blame] | 26 | /** |
| 27 | * If the resource is cached, creates and returns a new instance of it. |
| 28 | * |
| 29 | * @param key a key that uniquely identifies the drawable resource |
Adam Lesinski | fb302cc | 2016-02-29 16:50:38 -0800 | [diff] [blame] | 30 | * @param resources a Resources object from which to create new instances. |
Alan Viverette | e54d245 | 2015-05-06 10:41:43 -0700 | [diff] [blame] | 31 | * @param theme the theme where the resource will be used |
| 32 | * @return a new instance of the resource, or {@code null} if not in |
| 33 | * the cache |
| 34 | */ |
Mathew Inwood | 5c0d354 | 2018-08-14 13:54:31 +0100 | [diff] [blame] | 35 | @UnsupportedAppUsage |
Adam Lesinski | fb302cc | 2016-02-29 16:50:38 -0800 | [diff] [blame] | 36 | public Drawable getInstance(long key, Resources resources, Resources.Theme theme) { |
Alan Viverette | e54d245 | 2015-05-06 10:41:43 -0700 | [diff] [blame] | 37 | final Drawable.ConstantState entry = get(key, theme); |
| 38 | if (entry != null) { |
Adam Lesinski | fb302cc | 2016-02-29 16:50:38 -0800 | [diff] [blame] | 39 | return entry.newDrawable(resources, theme); |
Alan Viverette | e54d245 | 2015-05-06 10:41:43 -0700 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | return null; |
| 43 | } |
| 44 | |
| 45 | @Override |
| 46 | public boolean shouldInvalidateEntry(Drawable.ConstantState entry, int configChanges) { |
Alan Viverette | 7ef1e77 | 2015-07-20 16:03:04 -0400 | [diff] [blame] | 47 | return Configuration.needNewResources(configChanges, entry.getChangingConfigurations()); |
Alan Viverette | e54d245 | 2015-05-06 10:41:43 -0700 | [diff] [blame] | 48 | } |
| 49 | } |