HarmonyOS 鸿蒙Next中如何将图库中的图片复制到自己的应用沙箱？

你好，将图库的图片复制到自己应用沙箱，可以用@ohos.file.fs 模块的fs.copyFile或者fs.copyFileSync 方法进行复制。示例如下：

import { fileUri } from '@kit.CoreFileKit';
import fs from '[@ohos](/user/ohos).file.fs';
import { abilityAccessCtrl, common, PermissionRequestResult, Permissions } from '@kit.AbilityKit';
import { photoAccessHelper } from '@kit.MediaLibraryKit';

@Entry
@Component
struct Index {
  private srcUri: string = '';
  @State src: string = fileUri.getUriFromPath(this.srcUri);
  @State copySrc: string = '';

  aboutToAppear(): void {
    this.requestPermissions(["ohos.permission.READ_IMAGEVIDEO", "ohos.permission.WRITE_IMAGEVIDEO"]);
  }

  requestPermissions(permissions: Array<Permissions>): void {
    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
    atManager.requestPermissionsFromUser(this.getUIContext().getHostContext() as common.UIAbilityContext, permissions)
      .then((data: PermissionRequestResult) => {
      })
      .catch((err: Error) => {
      })
  }

  copyFile(): void {
    console.info(`=-=:srcUri will copied: ${this.srcUri}`);
    try {
      let sourceFile: fs.File = fs.openSync(this.srcUri, fs.OpenMode.READ_WRITE);
      let context: common.UIAbilityContext = this.getUIContext().getHostContext() as common.UIAbilityContext;
      const base: string = context.filesDir;
      const resourcesDir: string = `${base}/resources`;
      const baseDir: string = `${resourcesDir}/base`;
      const mediaDir: string = `${baseDir}/media`;
      if (!fs.accessSync(mediaDir)) {
        fs.mkdirSync(mediaDir, true);
      }
      let destDir: string = `${mediaDir}/test.jpg`; //沙箱路径：/data/storage/el2/base/haps/entry/files/resources/base/media/test.jpg
      console.info(`=-=:destDir: ${destDir}`);
      if (fs.accessSync(destDir)) {
        console.info(`=-=:destDir: is exist`);
        fs.unlinkSync(destDir);
      }
      let destFile: fs.File = fs.openSync(destDir, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
      fs.copyFileSync(sourceFile.fd, destFile.fd);
      console.info(`=-=: copyFile success:target file;${destFile.path}`);
      this.copySrc = `file://${destDir}`;
      console.info(`=-=: this.copySrc:${this.copySrc}`);
      fs.closeSync(sourceFile);
    } catch (error) {
      console.error(`=-=: copyFile fail:${JSON.stringify(error)}`);
    }
  }

  private async selectImage(): Promise<void> {
    const picker: photoAccessHelper.PhotoViewPicker = new photoAccessHelper.PhotoViewPicker();
    try {
      const selectResult: photoAccessHelper.PhotoSelectResult = await picker.select({ maxSelectNumber: 1 });
      const uris: string[] = selectResult.photoUris;
      if (!uris || uris.length === 0) {
        console.warn('=-=:ImageManager: No image selected');
      }
      console.log(`=-=:the selectImage:${JSON.stringify(uris)}`);
      this.srcUri = uris[0]; //这里只获取一张图片
      this.src = fileUri.getUriFromPath(this.srcUri);
      console.log(`=-=:the load image path:${this.src}`);
    } catch (error) {
      console.error(`=-=:selectImage fail:${JSON.stringify(error)}`);
    }

  }

  build() {
    Column({ space: 20 }) {
      Column() {
        Text('SelectedImage:')
        Image(this.src)
          .height(50)
          .width(50)
          .onError((error: ImageError) => {
            console.error('=-=:load image err' + JSON.stringify(error));
          })
      }

      Column() {
        Text('CopiedImage:')
        Image(this.copySrc)
          .height(50)
          .width(50)
          .onError((error: ImageError) => {
            console.error('=-=:load CopiedImage  err' + JSON.stringify(error));
          })
      }

      Button('Select File')
        .onClick((event: ClickEvent) => {
          this.selectImage();
        })

      Button('Copy file')
        .onClick((event: ClickEvent) => {
          this.copyFile();
        })
    }
    .height('100%')
    .width('100%')
  }
}