I understand you want to display both Simplified and Traditional Chinese characters in a PDF generated by your Flutter application, and you'd like to use the google_fonts package to manage the fonts. This is a common requirement when dealing with multilingual content. Based on the information I have, and general best practices, here's a comprehensive guide on how to achieve this: Understanding the Challenge Character Sets: Chinese (both Simplified and Traditional) uses a vast character set (Unicode). Not all fonts support all of these characters. Font Selection: You need a font that specifically supports a wide range of Chinese characters. PDF Embedding: You need to ensure that the chosen font is properly embedded in the PDF so that the characters render correctly, even if the user doesn't have the font installed on their system. Google Fonts: The google_fonts package is a convenient way to access fonts from Google Fonts, but you need to be aware of how it works with PDF generation. Solution Breakdown

    flutter pub add syncfusion_flutter_pdf

    flutter pub add google_fonts

Code:

    import 'dart:io';
    import 'package:flutter/services.dart';
    import 'package:path_provider/path_provider.dart';
    import 'package:syncfusion_flutter_pdf/pdf.dart';
    import 'package:google_fonts/google_fonts.dart';
    import 'package:flutter/material.dart';

    Future<void> generatePdfWithChineseText() async {
      // 1. Get the cached font file path:
      final font = GoogleFonts.notoSans(); // Or another CJK font
      final fontData = await font.loadFont();
      final fontFile = File(fontData.fontFamily);

      // 2. Create a PDF document:
      final PdfDocument document = PdfDocument();
      final PdfPage page = document.pages.add();
      final PdfGraphics graphics = page.graphics;

      // 3. Load the font from the file:
      final List<int> fontBytes = await fontFile.readAsBytes();
      final PdfFont pdfFont = PdfTrueTypeFont(fontBytes, 12);

      // 4. Draw the text:
      final String chineseText = '你好世界！这是一个测试。繁體字測試。'; // Example text
      final PdfTextElement textElement = PdfTextElement(
        text: chineseText,
        font: pdfFont,
      );
      final PdfLayoutResult layoutResult = textElement.draw(
        page: page,
        bounds: Rect.fromLTWH(0, 0, page.getClientSize().width, page.getClientSize().height),
      )!;

      // 5. Save the document:
      final List<int> bytes = document.save();
      document.dispose();

      // 6. Save the PDF to a file (example):
      final String dir = (await getApplicationDocumentsDirectory()).path;
      final String path = '$dir/chinese_text.pdf';
      final File file = File(path);
      await file.writeAsBytes(bytes, flush: true);
      print('PDF saved to: $path');
    }

Explanation:* 1.
Get Cached Font: * GoogleFonts.notoSans(): Specifies the font you want to use. * font.loadFont(): Loads the font and returns the font data. * File(fontData.fontFamily): Creates a File object representing the cached font file. 2.
Create PDF: * PdfDocument(): Creates a new PDF document. * document.pages.add(): Adds a new page to the document. * page.graphics: Gets the graphics context for drawing. 3.
Load Font from File: * fontFile.readAsBytes(): Reads the font file's content as bytes. * PdfTrueTypeFont(fontBytes, 12): Creates a PdfFont object from the font bytes. 4.
Draw Text: * chineseText: The Chinese text you want to display. * PdfTextElement: Creates a text element with the specified text and font. * textElement.draw(): Draws the text onto the page. 5.
Save PDF: * document.save(): Saves the PDF document as bytes. * document.dispose(): Disposes of the document resources. 6.
Save to File: * getApplicationDocumentsDirectory(): Gets the app's documents directory. * File(path): Creates a File object for the PDF. * file.writeAsBytes(): Writes the PDF bytes to the file. Code Example (Conceptual - pdf package): This example demonstrates the general approach using pdf package. Install pdf:

    flutter pub add pdf

    import 'dart:io';
    import 'package:flutter/services.dart';
    import 'package:path_provider/path_provider.dart';
    import 'package:pdf/pdf.dart';
    import 'package:pdf/widgets.dart' as pw;
    import 'package:google_fonts/google_fonts.dart';
    import 'package:flutter/material.dart';

    Future<void> generatePdfWithChineseText() async {
      // 1. Get the cached font file path:
      final font = GoogleFonts.notoSans(); // Or another CJK font
      final fontData = await font.loadFont();
      final fontFile = File(fontData.fontFamily);

      // 2. Create a PDF document:
      final pdf = pw.Document();

      // 3. Load the font from the file:
      final List<int> fontBytes = await fontFile.readAsBytes();
      final pw.Font ttf = pw.Font.ttf(fontBytes.buffer.asByteData());

      // 4. Add a page to the document:
      pdf.addPage(
        pw.Page(
          build: (pw.Context context) {
            return pw.Center(
              child: pw.Text(
                '你好世界！这是一个测试。繁體字測試。', // Example text
                style: pw.TextStyle(font: ttf, fontSize: 20),
              ),
            );
          },
        ),
      );

      // 5. Save the document:
      final List<int> bytes = await pdf.save();

      //