HarmonyOS 电脑上的测试文件如何在文件管理里添加

将文件放到工程的rawfile文件夹下，再将文件复制到文件管理应用中

可参考：

import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';
import picker from '@ohos.file.picker';

@Entry
@Component
struct Page {
  @State documentpath : string= '';

  build() {
    Row() {
      Column() {
        Button(`新建文件`)
          .fontSize(16)
          .fontWeight(FontWeight.Bold)
          .margin(5)
          .onClick(() => {

            let documentSaveOptions = new picker.DocumentSaveOptions();
            documentSaveOptions.newFileNames = ['文管应用中文件名.txt'];
            let documentPicker = new picker.DocumentViewPicker();
            documentPicker.save(documentSaveOptions).then((documentSaveResult: Array<string>) => {
              console.info('DocumentViewPicker.save successfully, documentSaveResult uri: ' + JSON.stringify(documentSaveResult));
              this.documentpath = documentSaveResult[0]

            }).catch((err: BusinessError) => {
              console.error('DocumentViewPicker.save failed with err: ' + JSON.stringify(err));
            });

          })
        Button('写入').onClick(() => {
          //file.txt为rawfile目录下的文件名
          getContext(this).resourceManager.getRawFileContent('file.txt', (_err, value) => {
            let myBuffer:ArrayBufferLike = value.buffer
            let file = fs.openSync(this.documentpath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
            let writeLen = fs.writeSync(file.fd, myBuffer)
            console.info("testTag-write data to file succeed and size is:" + writeLen);
            fs.closeSync(file)
          });
        })

      }
      .width('100%')
    }
    .height('100%')
  }
}
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