1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef OHOS_ABILITY_RUNTIME_ELEMENT_CALLBACK_H 17 #define OHOS_ABILITY_RUNTIME_ELEMENT_CALLBACK_H 18 19 #include "configuration.h" 20 21 namespace OHOS { 22 namespace AppExecFwk { 23 class ElementsCallback { 24 public: 25 ElementsCallback() = default; 26 virtual ~ElementsCallback() = default; 27 28 /** 29 * 30 * Called when the system configuration of the device changes. 31 * 32 * @param config Indicates the new Configuration object. 33 * @param ability Indicates the new Ability object. 34 */ 35 virtual void OnConfigurationUpdated(const std::shared_ptr<Ability> &ability, const Configuration &config) = 0; 36 37 /** 38 * 39 * Will be called when the system has determined to trim the memory 40 * 41 * @param level Indicates the memory trim level, which shows the current memory usage status. 42 */ 43 virtual void OnMemoryLevel(int level) = 0; 44 }; 45 } // namespace AppExecFwk 46 } // namespace OHOS 47 #endif // OHOS_ABILITY_RUNTIME_ELEMENT_CALLBACK_H 48