HarmonyOS鸿蒙Next中应用启动后，如何去除持续2秒左右闪逝的"白色主窗口+灰色窗口+黑色窗口”？

HarmonyOS鸿蒙Next中应用启动后，如何去除持续2秒左右闪逝的"白色主窗口+灰色窗口+黑色窗口”？ 要开发了一个video应用，结果应用启动后，持续2秒左右闪现的"白色主窗口+灰色窗口+黑色窗口”，才显示期待的播放界面。

感觉好无语啊，我要的是应用启动后，直接进入期待的播放界面，而不是中间乱七八糟的无用窗口！

新建的project工程代码，不能做人性化点吗？应用启动后，乱七八糟的窗口切换，怎么好意思给用户用？

DevEco Studio 3.1 Release

Build Version: 3.1.0.500, built on April 28, 2023

project配置：Stage模型,API9

白色窗口

灰色窗口

黑色窗口

视频播放窗口

index.ets文件

import window from '@ohos.window';
// 测试本地视频及网络视频播放
@Entry
@Component
struct Index {
  @State message: string = 'Hello World'
  controller: VideoController = new VideoController();
  previewUris: Resource = $r('app.media.preview');
  innerResource: string = 'https://boot-video.xuexi.cn/video/1006/p/f2bcd0fc1fa55c6e448ba1dd098e9ce3-3d432a53bcd64d8b80fa96e4a86cf5fe-2.mp4';
  build() {
    Row() {
      Column() {
        Video({
          src: this.innerResource,
          previewUri: this.previewUris,
          controller: this.controller
        })
        .controls(false)
        .objectFit(ImageFit.Contain)
        .autoPlay(true)
      }
      .width('100%')
      .height('100%')
    }
    .width('100%')
    .height('100%')
  }
}

EntryAbility.ts文件

import UIAbility from '@ohos.app.ability.UIAbility';
import hilog from '@ohos.hilog';
import window from '@ohos.window';

export default class EntryAbility extends UIAbility {
  onCreate(want, launchParam) {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
  }

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

  onWindowStageCreate(windowStage: window.WindowStage) {
    // Main window is created, set main page for this ability
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');

    // 去状态栏、导航栏
    windowStage.getMainWindow((err, data) => {
      if (err.code) { return; }
      data.setWindowSystemBarEnable([]);
    });

    windowStage.loadContent('pages/Index', (err, data) => {
      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. Data: %{public}s', JSON.stringify(data) ?? '');
    });
  }

  onWindowStageDestroy() {
    // Main window is destroyed, release UI related resources
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');
  }

  onForeground() {
    // Ability has brought to foreground
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');
  }

  onBackground() {
    // Ability has back to background
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onBackground');
  }
}