如何在android中用乌尔都语生成pdf

implementation 'com.itextpdf:itextg:5.5.10'
implementation 'com.itextpdf:itextpdf:5.5.10'

String filePath = Environment.getExternalStorageDirectory().getPath() + "/sample.pdf";
Document document = new Document();

try {
    PdfWriter.getInstance(document, new FileOutputStream(filePath));
    document.open();
    
    // 在文档中添加内容
    Font urduFont = FontFactory.getFont("assets/urdu.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
    Paragraph paragraph = new Paragraph("مثالی جملہ ۔۔۔", urduFont);
    document.add(paragraph);
    
    document.close();
} catch (Exception e) {
    e.printStackTrace();
}

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />