本文总结一下常用的窗口管理、屏幕管理常用的方法，封装作为一个工具类，统一管理使用。例如获取屏幕长宽，获取状态栏和导航栏的高度，设置状态栏属性，设置横竖屏，设置沉浸式全屏等方法。
实现效果：

演示.gif

封装工具类api

源码：

import { display, window } from "@kit.ArkUI";

export class WindowUtils{
  public static windowStage: window.WindowStage

  public static getWindowStage(): window.WindowStage | undefined{
    if (WindowUtils.windowStage) {
      return WindowUtils.windowStage
    }
    return undefined
  }

  public static getWindow(): window.Window | undefined{
    if (WindowUtils.windowStage) {
      return WindowUtils.windowStage.getMainWindowSync()
    }
    return undefined;
  }
  //获取主窗口宽度
  public static getWindowWidth(): number {
    if (WindowUtils.windowStage) {
      return WindowUtils.windowStage.getMainWindowSync().getWindowProperties().windowRect.width;
    }
    return 0
  }
  //获取主窗口高度
  public static getWindowHeight(): number {
    if (WindowUtils.windowStage) {
      return WindowUtils.windowStage.getMainWindowSync().getWindowProperties().windowRect.height;
    }
    return 0
  }
  //获取状态栏高度
  public static getStatusHeight(): number {
    if (WindowUtils.windowStage) {
      return WindowUtils.windowStage.getMainWindowSync().getWindowAvoidArea(window.AvoidAreaType.TYPE_SYSTEM).topRect.height;
    }
    return 0;
  }
  //获取导航栏高度
  public static getNavHeight(): number {
    if (WindowUtils.windowStage) {
      return WindowUtils.windowStage.getMainWindowSync().getWindowAvoidArea(window.AvoidAreaType.TYPE_NAVIGATION_INDICATOR).bottomRect.height;
    }
    return 0;
  }
  //设置沉浸式全屏
  //1.单个页面实现沉浸式，优先考虑使用expandSafeArea属性扩展安全区域的方案实现
  //2.若必须使用setWindowLayoutFullScreen()方法实现沉浸式，
  // 可在NavDestination组件的onShown生命周期中进入沉浸式，onHidden生命周期中退出沉浸式。
  // 如果使用的是Router进行路由，可在组件的onPageShow生命周期中进入沉浸式，onPageHide生命周期中退出沉浸式
  public static setWindowFullScreen(isLayoutFullScreen: boolean) {
    if (!WindowUtils.windowStage) {
      return;
    }
    WindowUtils.windowStage.getMainWindowSync().setWindowLayoutFullScreen(isLayoutFullScreen)
  }
  //当前窗口布局是否沉浸式
  public static isFullScreen():boolean{
    if (WindowUtils.windowStage) {
      return WindowUtils.windowStage.getMainWindowSync().getWindowProperties().isLayoutFullScreen
    }
    return false
  }

  //设置状态栏属性
  //设置了状态栏内容颜色statusBarContentColor  isStatusBarLightIcon属性将不生效
  public static setWindowSystemBar(properties:CustomSystemBarProperties= {
    statusBarColor: '#FFFFFF',
    isStatusBarLightIcon: false,
    statusBarContentColor: '#000000',
    enableStatusBarAnimation: false}){
    if (!WindowUtils.windowStage) {
      return;
    }
    WindowUtils.windowStage.getMainWindowSync().setWindowSystemBarProperties({
      statusBarColor:properties.statusBarColor,  //状态栏背景颜色
      isStatusBarLightIcon:properties.isStatusBarLightIcon,  //状态栏图标是否为高亮状态
      statusBarContentColor:properties.statusBarContentColor,//状态栏文字颜色
      enableStatusBarAnimation:properties.enableStatusBarAnimation //是否使能状态栏属性变化时动画效果
    })
  }
  //隐藏状态栏和导航栏
  public static  setSystemBarHiddenShow(show:boolean){
    if (show) {
      WindowUtils.windowStage.getMainWindowSync().setWindowLayoutFullScreen(show)
      WindowUtils.windowStage.getMainWindowSync().setWindowSystemBarEnable([]);
    }else {
      WindowUtils.windowStage.getMainWindowSync().setWindowLayoutFullScreen(show)
      WindowUtils.windowStage.getMainWindowSync().setWindowSystemBarEnable(['status', 'navigation']);
    }

  }

  //设置竖屏
  public static setOrientationPortrait(){
    WindowUtils.windowStage.getMainWindowSync().setPreferredOrientation(1)
  }
  //设置横屏
  public static setOrientationLandscape(){
    WindowUtils.windowStage.getMainWindowSync().setPreferredOrientation(2)
  }
  //跟随传感器自动旋转
  public static setOrientationAuto(){
    WindowUtils.windowStage.getMainWindowSync().setPreferredOrientation(5)
  }
  //判断当前是竖屏还是横屏 竖屏返回true
  public static getPreferredOrientationIsPortrait():boolean{
    if (display.getDefaultDisplaySync().orientation.valueOf() == 0||2) {
        return true
    }else if (display.getDefaultDisplaySync().orientation.valueOf() == 1||3){
      return false
    }
    return false
  }
  //计算页面顶部两侧按钮的左右边距
  //1.挖孔在左边，则左侧按钮左边距 = 挖孔距屏幕左侧边缘的距离 + 挖孔区域的宽度
  //2.挖孔在右侧，则右侧按钮右边距 = 挖孔距屏幕右侧边缘的距离 + 挖孔区域的宽度
  public static async getStatusBarMargin(): Promise<StatusBarMargin> {
   let  cutoutInfo  = await display.getDefaultDisplaySync().getCutoutInfo()
   let  boundingRects =  cutoutInfo  .boundingRects

    if (!boundingRects || boundingRects.length === 0) {
      return { left: 0, right: 0 };
    }
    const cutoutRect = boundingRects[0];
    const cutoutLeftGap = cutoutRect.left;
    const cutoutWidth = cutoutRect.width;
    const cutoutRightGap =  WindowUtils.getWindowWidth() - cutoutLeftGap - cutoutWidth;
    if (Math.abs(cutoutLeftGap - cutoutRightGap) <= 10) {
      return { left: 0, right: 0 };
    }
    if (cutoutLeftGap < cutoutRightGap) {
      return { left: cutoutLeftGap + cutoutWidth, right: 0 };
    }
    return { left: 0, right: cutoutRightGap + cutoutWidth };
  }
}
export interface  CustomSystemBarProperties{
  statusBarColor?:string
  isStatusBarLightIcon?:boolean
  statusBarContentColor?:string
  enableStatusBarAnimation?:boolean
}
@ObservedV2
export class  StatusBarMargin{
  @Trace left: number =0
  @Trace right: number = 0
}

EntryAbility初始化：

onWindowStageCreate(windowStage: window.WindowStage): void {
  WindowUtils.windowStage = windowStage
}