如何将PDF文件保存在扑波中？

发布于 2025-01-29 08:04:19 字数 837 浏览 2 评论 0原文

我有一个PDF文件。我想在手机内存中写入该文件？以下是代码。首先，我正在扫描，然后将图像转换为PDF，现在我想将PDF保存到电话内存。请帮我。

  void onDocumentScanner(BuildContext context) async {
try {
  File scannedDocumentFile;
  var doc = await DocumentScannerFlutter.launchForPdf(context);
  if (doc != null) {
    refreshDownloadedFiles();
    scannedDocumentFile = doc;
    String fileName = basename(scannedDocumentFile.path);
    final directory = (await getExternalStorageDirectory())!.path;
    File saveFilePath = File('$directory/$fileName');
    saveFilePath.openWrite(); //Here I want to save to the file

    print("Path = $fileName");
    Get.toNamed(AppRoutes.viewDownloadedFile,
            arguments: [scannedDocumentFile.path, fileName, folderId])!
        .whenComplete(() {
      refreshFetchedData();
    });
  }
} catch (e) {
  print(e);
}

}

原文

I have a pdf file. I want to write that file in phone memory? Below is the code.
First I am scanning then I am converting the image to pdf, Now I want to save that pdf to phone memory. Please help me.

  void onDocumentScanner(BuildContext context) async {
try {
  File scannedDocumentFile;
  var doc = await DocumentScannerFlutter.launchForPdf(context);
  if (doc != null) {
    refreshDownloadedFiles();
    scannedDocumentFile = doc;
    String fileName = basename(scannedDocumentFile.path);
    final directory = (await getExternalStorageDirectory())!.path;
    File saveFilePath = File('$directory/$fileName');
    saveFilePath.openWrite(); //Here I want to save to the file

    print("Path = $fileName");
    Get.toNamed(AppRoutes.viewDownloadedFile,
            arguments: [scannedDocumentFile.path, fileName, folderId])!
        .whenComplete(() {
      refreshFetchedData();
    });
  }
} catch (e) {
  print(e);
}

}

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病毒体 2025-02-05 08:04:19

我之前从未看过.openwrite（）方法，但是文档说它具有2个命名参数filemode和编码 - 尝试指定它们。
如果它不起作用，我只能与.writeasbytes方法共享我的解决方案。
代替SaveFilePath.openWrite（）您可以先捆绑数据，然后保存。

final byteData = await rootBundle.load(fileName);
await saveFilePath.writeAsBytes(byteData.buffer
          .asUint8List(byteData.offsetInBytes, byteData.lengthInBytes));

I haven't seen the .openWrite() method before, but the documentation says that it has 2 named arguments FileMode and encoding - try to specify them.
If it won't work, I can only share my solution, with .writeAsBytes method.
Instead of saveFilePath.openWrite() you can bundle the data first and then save it.

final byteData = await rootBundle.load(fileName);
await saveFilePath.writeAsBytes(byteData.buffer
          .asUint8List(byteData.offsetInBytes, byteData.lengthInBytes));

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