56 lines
1.9 KiB
Java
56 lines
1.9 KiB
Java
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.content.res;
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import android.compat.annotation.UnsupportedAppUsage;
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import android.graphics.drawable.Drawable;
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import android.os.Build;
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/**
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* Class which can be used to cache Drawable resources against a theme.
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*/
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class DrawableCache extends ThemedResourceCache<Drawable.ConstantState> {
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@UnsupportedAppUsage
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DrawableCache() {
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}
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/**
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* If the resource is cached, creates and returns a new instance of it.
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*
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* @param key a key that uniquely identifies the drawable resource
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* @param resources a Resources object from which to create new instances.
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* @param theme the theme where the resource will be used
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* @return a new instance of the resource, or {@code null} if not in
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* the cache
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*/
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@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
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public Drawable getInstance(long key, Resources resources, Resources.Theme theme) {
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final Drawable.ConstantState entry = get(key, theme);
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if (entry != null) {
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return entry.newDrawable(resources, theme);
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}
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return null;
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}
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@Override
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public boolean shouldInvalidateEntry(Drawable.ConstantState entry, int configChanges) {
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return Configuration.needNewResources(configChanges, entry.getChangingConfigurations());
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}
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}
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