@ohos.app.ability.Configuration (环境变量)

import { Configuration } from '@kit.AbilityKit';

import { UIAbility, AbilityConstant, EnvironmentCallback, Want } from '@kit.AbilityKit';
import { BusinessError } from '@kit.BasicServicesKit';

export default class EntryAbility extends UIAbility {
  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {
    let envCallback: EnvironmentCallback = {
      onConfigurationUpdated(config) {
        console.info(`envCallback onConfigurationUpdated success: ${JSON.stringify(config)}`);
        let language = config.language;
        let colorMode = config.colorMode;
        let direction = config.direction;
        let screenDensity = config.screenDensity;
        let displayId = config.displayId;
        let hasPointerDevice = config.hasPointerDevice;
        let fontId = config.fontId;
        let fontSizeScale = config.fontSizeScale;
        let fontWeightScale = config.fontWeightScale;
        let mcc = config.mcc;
        let mnc = config.mnc;
        let locale = config.locale;
      },
      onMemoryLevel(level) {
        console.log(`onMemoryLevel level: ${level}`);
      }
    };
    try {
      let applicationContext = this.context.getApplicationContext();
      let callbackId = applicationContext.on('environment', envCallback);
      console.log(`callbackId: ${callbackId}`);
    } catch (paramError) {
      console.error(`error: ${(paramError as BusinessError).code}, ${(paramError as BusinessError).message}`);
    }
  }
}