HarmonyOS 鸿蒙Next 启动页如何去掉顶部和底部空白区域

参考:EntryAbility.ets

import { AbilityConstant, 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 {
  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
  }

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

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

    windowStage.loadContent('pages/splash', (err) => {
      if (err.code) {
        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      let windowClass: window.Window = windowStage.getMainWindowSync(); // 获取应用主窗口
      // 1. 设置窗口全屏
      let isLayoutFullScreen = true;
      windowClass.setWindowLayoutFullScreen(isLayoutFullScreen)
        .then(() => {
          console.info('Succeeded in setting the window layout to full-screen mode.');
        })
        .catch((err: BusinessError) => {
          console.error('Failed to set the window layout to full-screen mode. Cause:' + JSON.stringify(err));
        });
      // 2. 设置状态栏和导航条隐藏
      windowClass.setSpecificSystemBarEnabled('status', false)
        .then(() => {
          console.info('Succeeded in setting the status bar to be invisible.');
        })
        .catch((err: BusinessError) => {
          console.error(`Failed to set the status bar to be invisible. Code is ${err.code}, message is ${err.message}`);
        });
      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');
  }
}

启动闪屏页splash.ets

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

@Entry
@Component
struct Splash {
  @State message: string = 'Hello World';

  aboutToAppear(): void {
    setTimeout(() => {
      router.pushUrl({ url: 'pages/Index' })
    }, 3000);
  }

  aboutToDisappear(): void {
    //销毁定时器
  }

  build() {
    Column() {
      Image($r('app.media.startIcon')).width('100%').height("100%")//占据页面
    }.backgroundColor(Color.Red)
    .height('100%')
    .width('100%')
  }
}

首页index.ets

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';

  build() {
    RelativeContainer() {
      Text(this.message)
        .id('HelloWorld')
        .fontSize(50)
        .fontWeight(FontWeight.Bold)
        .alignRules({
          center: { anchor: '__container__', align: VerticalAlign.Center },
          middle: { anchor: '__container__', align: HorizontalAlign.Center }
        })
    }.backgroundColor(Color.Green)
    .height('100%')
    .width('100%')
  }
}