如何在应用内使用媒体查询进行布局

import { mediaquery, window } from '@kit.ArkUI';
import { common } from '@kit.AbilityKit';

@Entry
@Component
struct MediaQueryExample {
  @State color: string = '#DB7093';
  @State text: string = 'Portrait';
  @State portraitFunc:mediaquery.MediaQueryResult|void|null = null;
当设备横屏时条件成立
  listener:mediaquery.MediaQueryListener = mediaquery.matchMediaSync('(orientation: landscape)');

当满足媒体查询条件时，触发回调
  onPortrait(mediaQueryResult:mediaquery.MediaQueryResult) {
若设备为横屏状态，更改相应的页面布局
      this.color = '#FFD700';
      this.text = 'Landscape';
    } else {
      this.color = '#DB7093';
      this.text = 'Portrait';
    }
  }

  aboutToAppear() {
绑定当前应用实例
绑定回调函数
    this.listener.on('change', (mediaQueryResult:mediaquery.MediaQueryResult) => { this.onPortrait(mediaQueryResult) });
  }

改变设备横竖屏状态函数
  private changeOrientation(isLandscape: boolean) {
获取UIAbility实例的上下文信息
    let context:common.UIAbilityContext = getContext(this) as common.UIAbilityContext;
调用该接口手动改变设备横竖屏状态
    window.getLastWindow(context).then((lastWindow) => {
      lastWindow.setPreferredOrientation(isLandscape ? window.Orientation.LANDSCAPE : window.Orientation.PORTRAIT)
    });
  }

  build() {
    Column({ space: 50 }) {
      Text(this.text).fontSize(50).fontColor(this.color)
      Text('Landscape').fontSize(50).fontColor(this.color).backgroundColor(Color.Orange)
        .onClick(() => {
          this.changeOrientation(true);
        })
      Text('Portrait').fontSize(50).fontColor(this.color).backgroundColor(Color.Orange)
        .onClick(() => {
          this.changeOrientation(false);
        })
    }
    .width('100%').height('100%')
  }
}
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