HarmonyOS 标准化数据通路共享文件，文件在接收方无法访问

在进行使用UDMF进行文件共享时，数据提供方已经正常配置一个txt文件，但是数据接收方接收的时候可以再data.getRecords里面找到数据的URL，file://com.example.ipcclient/data/storage/el2/base/haps/entry/files/data.txt，但是检查文件却不存在。下面附上文件提供方和接收方的代码：

数据提供方代码：

import { fileIo, fileUri } from '@kit.CoreFileKit';
import { util } from '@kit.ArkTS';
import { unifiedDataChannel } from '@kit.ArkData';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct UDMFPage {
  @State message: string = 'Hello World';
  filePath: string = getContext().filesDir + "/data.txt";

  build() {
    Row() {
      Column() {
        Button('写入文件').onClick(() => {
          fileIo.open(this.filePath, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE).then((file) => {
            fileIo.writeSync(file.fd, new util.TextEncoder().encodeInto('你好张三'))
          })
        }).width(86).height(36)
        Button('共享').onClick(() => {
          this.shareFiles()
        }).width('56vp').height(36)
      }
      .width('100%')
    }
    .height('100%')
  }
  shareFiles(){
    let fileUrlData: string = fileUri.getUriFromPath(this.filePath);
    let plainText = new unifiedDataChannel.File();
    plainText.uri = fileUrlData;
    let unifiedData = new unifiedDataChannel.UnifiedData(plainText);
    let options: unifiedDataChannel.Options = {
      intention: unifiedDataChannel.Intention.DATA_HUB
    }

    try {
      unifiedDataChannel.insertData(options, unifiedData, (err, data) => {
        if (err === undefined) {
          console.info(`Succeeded in inserting data. key = ${data}`);
        } else {
          console.error(`Failed to insert data. code is ${err.code},message is ${err.message} `);
        }
      });
    } catch (e) {
      let error: BusinessError = e as BusinessError;
      console.error(`Insert data throws an exception. code is ${error.code},message is ${error.message} `);
    }
  }
}
import { fileIo, fileUri, ReadOptions } from '@kit.CoreFileKit';
import { util } from '@kit.ArkTS';
import { unifiedDataChannel, uniformTypeDescriptor } from '@kit.ArkData';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct UDMFPage {
  @State message: string = 'Hello World';
  filePath: string = getContext().filesDir + "/data.txt";

  build() {
    Row() {
      Column() {
        Button('读取共享数据').onClick(() => {
          this.readFiles()
        }).width('86vp').height(56)
      }
      .width('100%')
    }
    .height('100%')
  }

  readFiles() {
    // key: 'file://com.example.ipcclient/data/storage/el2/base/haps/entry/files/data.txt'
    let options: unifiedDataChannel.Options = {
      intention: unifiedDataChannel.Intention.DATA_HUB
    }

    try {
      unifiedDataChannel.queryData(options, (err, data) => {
        if (err === undefined) {
          console.info(`Succeeded in querying data. size = ${data.length}`);
          for (let i = 0; i < data.length; i++) {
            let records = data[i].getRecords();
            for (let j = 0; j < records.length; j++) {
              if (records[j].getType() === uniformTypeDescriptor.UniformDataType.FILE) {
                let text = records[j] as unifiedDataChannel.File;
                console.info(`文件URL:${i + 1}.${text.uri}`);
                if (fileIo.accessSync(text.uri)) {
                  let fileInfo = fileIo.openSync(text.uri)
                  let buf = new ArrayBuffer(2048);
                  let readOptions: ReadOptions = {
                    offset: 0,
                    length: 2048
                  };
                  let readLen = fileIo.readSync(fileInfo.fd, buf, readOptions)
                  while (readLen > 0) {
                    console.log("data:" + util.TextDecoder.create('utf-8', { ignoreBOM: true })
                      .decodeWithStream(new Uint8Array(buf)))
                  }
                }else{
                  console.debug("文件不存在")
                }
              }
            }
          }
        } else {
          console.error(`Failed to query data. code is ${err.code},message is ${err.message} `);
        }
      });
    } catch (e) {
      let error: BusinessError = e as BusinessError;
      console.error(`Insert data throws an exception. code is ${error.code},message is ${error.message} `);
    }
  }
}