Harmony OS怎么识别手机的折叠和展开状态

import window from '@ohos.window';


// 获取窗口实例

let windowClass: window.Window;

window.getTopWindow((err, data) => {

  if (err) {

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

    return;

  }

  windowClass = data;

  

  // 注册屏幕形态变化监听

  windowClass.on('windowStageEvent', (event) => {

    if (event.type === window.WindowStageEventType.SCREEN_SHAPE_CHANGE) {

      // 处理屏幕形态变化

      handleScreenShapeChange(event);

    }

  });

});


// 处理屏幕形态变化

function handleScreenShapeChange(event: window.WindowStageEvent) {

  // 获取当前屏幕形态

  const display: window.Display = windowClass.getDisplay();

  const screenShape: window.ScreenShape = display.screenShape;

  

  switch (screenShape) {

    case window.ScreenShape.SCREEN_SHAPE_FULL:

      console.log('屏幕完全展开');

      updateLayoutForExpandedState();

      break;

    case window.ScreenShape.SCREEN_SHAPE_HALF_FOLD:

      console.log('设备半折叠（如书本角度）');

      break;

    case window.ScreenShape.SCREEN_SHAPE_FOLDED:

      console.log('屏幕完全折叠');

      updateLayoutForFoldedState();

      break;

  }

}