#鸿蒙通关秘籍#如何通过UIAbility订阅并响应系统环境变化？

UIAbility提供了onConfigurationUpdate()方法用于订阅系统环境变量的改变。当系统配置发生变化时，可以通过Configuration对象来获取新的配置，从而在应用中进行相应的处理，不必重启UIAbility。

bash import { AbilityConstant, Configuration, UIAbility, Want } from '@kit.AbilityKit'; import { hilog } from '@kit.PerformanceAnalysisKit';

const TAG: string = '[EntryAbility]'; const DOMAIN_NUMBER: number = 0xFF00;

let systemLanguage: string | undefined;

export default class EntryAbility extends UIAbility { onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void { systemLanguage = this.context.config.language; hilog.info(DOMAIN_NUMBER, TAG, systemLanguage is ${systemLanguage}); }

onConfigurationUpdate(newConfig: Configuration): void { hilog.info(DOMAIN_NUMBER, TAG, onConfigurationUpdated systemLanguage is ${systemLanguage}, newConfig: ${JSON.stringify(newConfig)}); if (systemLanguage !== newConfig.language) { hilog.info(DOMAIN_NUMBER, TAG, systemLanguage from ${systemLanguage} changed to ${newConfig.language}); systemLanguage = newConfig.language; } } }