HarmonyOS 鸿蒙Next 设置应用显示模式固定为浅色模式

应用主动设置深浅色模式：即颜色只固定，不跟随系统模式变动。 监听深浅色切换事件：this.context.config.colorMode以及onConfigurationUpdate监听颜色模式变得，参考https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-app-ability-configuration-V5 。demo如下：

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

import { hilog } from '@kit.PerformanceAnalysisKit';

import { window } from '@kit.ArkUI';

import { BusinessError } from '@kit.BasicServicesKit';

export default class EntryAbility extends UIAbility {

  colorMode: number | undefined = 0

  onConfigurationUpdate(newConfig: Configuration): void {

    this.colorMode = newConfig.colorMode

    let windowStage: window.WindowStage | undefined = AppStorage.get('windowStage')

    if (windowStage !== undefined) {

      this.changeColor(windowStage)

    }

  }

  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {

    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');

    this.colorMode = this.context.config.colorMode

  }

  onDestroy(): void {

    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onDestroy');

  }

  changeColor(windowStage: window.WindowStage) {

    let windowClass: window.Window | null

    windowStage.getMainWindow((err: BusinessError, data) => {

      let errCode: number = err.code;

      if (errCode) {

        console.error('Failed to obtain the main window. Cause: ' + JSON.stringify(err));

        return;

      }

      windowClass = data;

      console.info('Succeeded in obtaining the main window. Data: ' + JSON.stringify(data));

      let sysBarProps: window.SystemBarProperties = {

        statusBarColor: this.colorMode === 0 ? '#aa00ff0b' : '#ff00ff',

        navigationBarColor: '#00ff00',

        // 以下两个属性从API Version 8开始支持

        statusBarContentColor: this.colorMode === 0 ? '#aaff0000' : '#ff002aff',

        navigationBarContentColor: '#ffffff'

      };

      windowClass.setWindowSystemBarProperties(sysBarProps, (err: BusinessError) => {

        let errCode: number = err.code;

        if (errCode) {

          console.error('Failed to set the system bar properties. Cause: ' + JSON.stringify(err));

          return;

        }

        console.info('Succeeded in setting the system bar properties.');

      });

    })

  }

  onWindowStageCreate(windowStage: window.WindowStage): void {

    // Main window is created, set main page for this ability

    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');

    AppStorage.setOrCreate('windowStage', windowStage)

    this.changeColor(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.');

    });

  }

  onWindowStageDestroy(): void {

    // Main window is destroyed, release UI related resources

    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');

  }

  onForeground(): void {

    // Ability has brought to foreground

    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');

  }

  onBackground(): void {

    // Ability has back to background

    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onBackground');

  }

}