1/* 2 * Copyright (c) 2022-2023 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 16import AbilityConstant from './@ohos.app.ability.AbilityConstant'; 17import { Configuration } from './@ohos.app.ability.Configuration'; 18 19/** 20 * The environment callback. 21 * 22 * @syscap SystemCapability.Ability.AbilityRuntime.Core 23 * @since 9 24 */ 25export default class EnvironmentCallback { 26 /** 27 * Called when the system configuration is updated. 28 * 29 * @param { Configuration } config - Indicates the updated configuration. 30 * @syscap SystemCapability.Ability.AbilityRuntime.AbilityCore 31 * @StageModelOnly 32 * @since 9 33 */ 34 onConfigurationUpdated(config: Configuration): void; 35 36 /** 37 * Called when the system has determined to trim the memory, for example, when the ability is running in the 38 * background and there is no enough memory for running as many background processes as possible. 39 * 40 * @param { AbilityConstant.MemoryLevel } level - Indicates the memory trim level, which shows the current memory usage status. 41 * @syscap SystemCapability.Ability.AbilityRuntime.AbilityCore 42 * @StageModelOnly 43 * @since 9 44 */ 45 onMemoryLevel(level: AbilityConstant.MemoryLevel): void; 46} 47