将位图中的PDF保存到内部存储或按意图发送

我想从位图生成PDF,但我不想使用外部存储(在所有示例中,如何使用外部存储,但我不想强制用户在手机中使用SD卡)。我想通过intent共享我的PDF,通过电子邮件发送或存储在GoogleDrive/电话存储中。我正在使用 Itext library .

目前,我无法将其保存在内部存储器上(我在尝试保存时遇到“打开文件时出错:src”Toast),而且google驱动器和邮件发送也失败(收到消息,文件无法上载/附加)

代码:

    Bitmap bitmap = loadBitmapFromView(view);
    //Now create the name of your PDF file that you will generate
    File pdfFile = new File(CreatePDFActivity.this.getFilesDir(), "myPdfFile.pdf");

    try {
        Document document=new Document();

        PdfWriter.getInstance(document,new FileOutputStream(pdfFile.getAbsolutePath())); //  Change pdf's name.
        document.open();
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
        Image img =Image.getInstance(stream.toByteArray());  // Change image's name and extension.

        float scaler = ((document.getPageSize().getWidth() - document.leftMargin()
                         - document.rightMargin() - 0) / img.getWidth()) * 100; // 0 means you have no indentation. If you have any, change it.

        img.scalePercent(scaler);
        img.setAlignment(Image.ALIGN_CENTER | Image.ALIGN_TOP);


        document.add(img);
        document.close();


        Intent intent = new Intent(Intent.ACTION_SEND);

        intent.putExtra(Intent.EXTRA_SUBJECT, "Test ");
        Uri uri = Uri.fromFile(new File( CreatePDFActivity.this.getFilesDir(), "myPdfFile.pdf"));
        intent.putExtra(Intent.EXTRA_STREAM, uri);
        intent.addFlags( Intent.FLAG_GRANT_READ_URI_PERMISSION );
        intent.setType("application/pdf");
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
    }
    catch (Exception e){
        e.printStackTrace();
    }