如何在android中将Recyclerview转换为PDF？

implementation 'com.itextpdf:itextpdf:5.5.10'
implementation 'com.github.barteksc:android-pdf-viewer:2.8.2'

String outputFile = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS) + "/output.pdf";
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream(outputFile));
document.open();

PdfPTable table = new PdfPTable(numberOfColumns);
table.setWidthPercentage(100);

// 遍历RecyclerView的每个项
for (int i = 0; i < recyclerView.getAdapter().getItemCount(); i++) {
    // 获取RecyclerView的ViewHolder
    RecyclerView.ViewHolder viewHolder = recyclerView.findViewHolderForAdapterPosition(i);

    // 创建一个表格单元格
    PdfPCell cell = new PdfPCell();

    // 在单元格中添加RecyclerView项的内容
    View itemView = viewHolder.itemView;
    itemView.measure(View.MeasureSpec.makeMeasureSpec(recyclerView.getWidth(), View.MeasureSpec.EXACTLY),
            View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
    itemView.layout(0, 0, itemView.getMeasuredWidth(), itemView.getMeasuredHeight());
    Bitmap bitmap = Bitmap.createBitmap(itemView.getWidth(), itemView.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    canvas.drawColor(Color.WHITE);
    itemView.draw(canvas);
    Image image = Image.getInstance(bitmap, null);
    cell.addElement(image);
    cell.setPadding(8);
    
    // 将单元格添加到表格中
    table.addCell(cell);
}

// 将表格添加到PDF文档中
document.add(table);
document.close();

PDFView pdfView = findViewById(R.id.pdfView);
pdfView.fromFile(new File(outputFile))
        .defaultPage(0)
        .enableSwipe(true)
        .load();