1 /* 2 * Copyright (c) 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 IMF_SYSTEM_LANGUAGE_OBSERVER_H 17 #define IMF_SYSTEM_LANGUAGE_OBSERVER_H 18 19 namespace OHOS { 20 namespace MiscServices { 21 class SystemLanguageObserver { 22 public: 23 static SystemLanguageObserver &GetInstance(); 24 void Watch(); 25 26 private: 27 static constexpr const char *SYSTEM_LANGUAGE_KEY = "persist.global.language"; 28 SystemLanguageObserver() = default; 29 static void OnChange(const char *key, const char *value, void *context); 30 }; 31 } // namespace MiscServices 32 } // namespace OHOS 33 34 #endif // IMF_SYSTEM_LANGUAGE_OBSERVER_H 35