1 /*
2  * Copyright (c) 2021-2023 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(
36         const std::shared_ptr<AbilityRuntime::UIAbility> &ability, const Configuration &config) = 0;
37 
38     /**
39      *
40      * Will be called when the system has determined to trim the memory
41      *
42      * @param level Indicates the memory trim level, which shows the current memory usage status.
43      */
44     virtual void OnMemoryLevel(int level) = 0;
45 };
46 }  // namespace AppExecFwk
47 }  // namespace OHOS
48 #endif  // OHOS_ABILITY_RUNTIME_ELEMENT_CALLBACK_H
49