HarmonyOS 关于系统相机拍照染回的resultUri的问题

进入相机后，如果直接按下"X"会返回的空，如果拍了照片按下"√"才会有uri值：

import picker from '@ohos.multimedia.cameraPicker';
import camera from '@ohos.multimedia.camera';
import common from '@ohos.app.ability.common';
import { BusinessError } from '@ohos.base';

let mContext = getContext(this) as common.Context;

async function demo() {
  try {
    let pickerProfile: picker.PickerProfile = {
      cameraPosition: camera.CameraPosition.CAMERA_POSITION_BACK
    };
    let pickerResult: picker.PickerResult = await picker.pick(mContext,
      [picker.PickerMediaType.PHOTO, picker.PickerMediaType.VIDEO], pickerProfile);
    console.log("demo the pick pickerResult is:" + JSON.stringify(pickerResult));
  } catch (error) {
    let err = error as BusinessError;
    console.error(`the pick call failed. error code: ${err.code}`);
  }
}

async function demo2() {
  try {
    let pickerProfile: picker.PickerProfile = {
      cameraPosition: camera.CameraPosition.CAMERA_POSITION_BACK
    };
    picker.pick(getContext(),
      [picker.PickerMediaType.PHOTO, picker.PickerMediaType.VIDEO], pickerProfile)
      .then((pickerResult: picker.PickerResult) => {
        console.log("demo2 the pick pickerResult is:" + JSON.stringify(pickerResult));
    }).catch((err: BusinessError) => {
    })
  } catch (error) {
    let err = error as BusinessError;
    console.error(`the pick call failed. error code: ${err.code}`);
  }
}

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

  build() {
    Row() {
      Column() {
        Button("test").onClick(() => {
          demo2();
        })
      }
      .width('100%')
    }
    .height('100%')
  }
}