HarmonyOS鸿蒙Next中护眼模式的示例代码

工具类

```javascript
import { hilog } from '[@kit](/user/kit).PerformanceAnalysisKit';
import { window } from '[@kit](/user/kit).ArkUI';
import { bundleManager } from '[@kit](/user/kit).AbilityKit';
import { BusinessError } from '[@kit](/user/kit).BasicServicesKit';

export class EyeProtectionMode {
  windowStage: window.WindowStage|null = null
  eye_windowClass: window.Window | null = null
  private static sInstance: EyeProtectionMode
  public static getInstance(): EyeProtectionMode {
    if (!EyeProtectionMode.sInstance) {
      EyeProtectionMode.sInstance = new EyeProtectionMode();
    }
    return EyeProtectionMode.sInstance;
  }
  createSubWithEyeWindow(backgroundColor: string): void {
    if (this.windowStage == null) {
      console.error('windowStage为空，请先传值后再创建')
    } else {
      this.windowStage.createSubWindow('eyeWindow', (error: BusinessError, data) => {
        if (error.code) {
          console.error('创建护眼模式window失败：', JSON.stringify(error))
          return
        }

        //  private eye_windowClass: window.Window | null = null; 单列设置的属性
        this.eye_windowClass= data
        console.log('创建护眼模式window成功')
        // 2、设置全屏显示
        this.eye_windowClass?.setWindowLayoutFullScreen(true)
        //3、设置不可触摸，防止护眼模式窗口阻挡主窗口的手势
        this.eye_windowClass.setWindowTouchable(false)
        //4、设置window的承载content，必须设置，否则会显示失败
        //下面是页面路由路径的获取，appBundleName方法已在下面贴出，TBXBaseLib是我自己的具体组件模块名：
        const pagePath = 'ets/pages/EyesProtectPage.ets'
        let url = `@bundle:${this.appBundleName()}/entry/${pagePath}`
        this.eye_windowClass.setUIContent(url, (err: BusinessError) => {
          // 5.设置背景颜色
          if (!err.code) {
            this.eye_windowClass?.setWindowBackgroundColor(backgroundColor)
          }
        })

        //6、显示窗口
        this.eye_windowClass?.showWindow((err: BusinessError) => {
          let errCode = err.code;
          if (errCode) {
            console.error('Failed to show the window. Cause: ' + JSON.stringify(err));
            return;
          }
          console.info('Succeeded in showing the window.');
        })
      })
    }
  }

  /*移除护眼模式子窗口*/
  removeSubWithEyeWindow(): void {
    if (this.eye_windowClass != null) {
      this.eye_windowClass.destroyWindow((error: BusinessError) => {
        let errCode = error.code
        if (errCode) {
          console.error('Failed to destroy the window. Cause: ' + JSON.stringify(error));
          return;
        }
        console.info('Succeeded in destroying the window.');
        this.eye_windowClass = null
      })
    }

  }

  /**
   * 获取app bundleName
   */
  appBundleName(): string {
    return bundleManager.getBundleInfoForSelfSync(bundleManager.BundleFlag.GET_BUNDLE_INFO_WITH_APPLICATION)
      .appInfo
      .descriptionResource
      .bundleName
  }
}

在onWindowStageCreate中给windowStage赋值

onWindowStageCreate(windowStage: window.WindowStage): void {
  // Main window is created, set main page for this ability
  hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');
  //给windowStage赋值
  EyeProtectionMode.getInstance().windowStage = windowStage
  windowStage.loadContent('pages/Index', (err) => {
    if (err.code) {
      hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
      return;
    }
    hilog.info(0x0000, 'testTag', 'Succeeded in loading the content.');
  });
}

调用

Column({
  space:14
}){
  Button('开启护眼模式')
    .onClick(() =>{
      EyeProtectionMode.getInstance().createSubWithEyeWindow('#1Af3f364')
    })
  Button('关闭护眼模式')
    .onClick(() =>{
      EyeProtectionMode.getInstance().removeSubWithEyeWindow()
    })
}

在HarmonyOS（鸿蒙）中，护眼模式可以通过调整屏幕的色温来实现。以下是一个简单的示例代码，展示如何在HarmonyOS Next中实现护眼模式：

import ohos.agp.window.service.WindowManager;
import ohos.agp.window.service.WindowManager.LayoutParams;
import ohos.app.Context;

public class EyeProtectionMode {
    public static void enableEyeProtectionMode(Context context) {
        WindowManager windowManager = context.getWindowManager();
        LayoutParams layoutParams = windowManager.getWindow().getAttributes();
        layoutParams.screenBrightness = 0.5f; // 调整屏幕亮度
        layoutParams.screenTint = 0xFFFFF0; // 设置屏幕色温为护眼色
        windowManager.getWindow().setAttributes(layoutParams);
    }
}

这个示例代码通过调整屏幕亮度和色温来实现护眼模式。你可以根据实际需求进一步优化和扩展功能。