HarmonyOS如何打开手机相册

import { BusinessError } from '@ohos.base'; 
import { picker } from '@kit.CoreFileKit'; 
async function example03() { 
  try { 
    let photoPicker = new picker.PhotoViewPicker(); 
    photoPicker.select((err: BusinessError, PhotoSelectResult: picker.PhotoSelectResult) => { 
      if (err) { 
        console.error('PhotoViewPicker.select failed with err: ' + JSON.stringify(err)); 
        return; 
      } 
      console.info('PhotoViewPicker.select successfully, PhotoSelectResult uri: ' + JSON.stringify(PhotoSelectResult)); 
    }); 
  } catch (error) { 
    let err: BusinessError = error as BusinessError; 
    console.error('PhotoViewPicker failed with err: ' + JSON.stringify(err)); 
  } 
} 
@Entry 
@Component 
struct PhotoViewPicker { 
  @State message: string = 'Hello World'; 
  build() { 
    Row() { 
      Column() { 
        Button('PhotoPick') 
          .onClick(() => { 
            example03(); 
          }) 
          .margin({right:12}) 
          .margin({top:20}) 
          .width(150) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}