I/flutter ( 3281): Exception: Exception: Unable to guess the image type 1311710 bytes

[565537905qqcom]

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

import 'dart:typed_data';

class PdfViewer extends StatefulWidget {
final Map<String, dynamic> template;
final List<Map<String, dynamic>> bankDetailsList;

const PdfViewer({Key? key, required this.template, required this.bankDetailsList})
: super(key: key);

@OverRide
_PdfViewerState createState() => _PdfViewerState();
}

class _PdfViewerState extends State {
String? docxFilePath;
String? pdfFilePath;

@OverRide
void initState() {
super.initState();
final contractNumber = widget.bankDetailsList.isNotEmpty ? widget.bankDetailsList.first['contract_number'] : '';
_generatePdfFromTemplate();
}

@OverRide
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Word Viewer'),
),
body: pdfFilePath == null
? Center(child: CircularProgressIndicator())
: PDFView(
filePath: pdfFilePath!,
enableSwipe: true,
swipeHorizontal: true,
autoSpacing: false,
pageFling: false,
onRender: (_pages) {
setState(() {});
},
onError: (error) {
print(error.toString());
},
onPageError: (page, error) {
print('$page: ${error.toString()}');
},
onViewCreated: (PDFViewController pdfViewController) {
// _controller.complete(pdfViewController);
},
onPageChanged: (int? page, int? total) {
print('page change: $page/$total');
},
),
);
}
Future _generatePdfFromTemplate() async {
try {

  // 从模板文件中创建 DocxTemplate 实例
  final docx = await DocxTemplate.fromBytes(await File(widget.template['pdfFilePath']).readAsBytes());
  
  // 准备图像数据
  final imageBytes = await File(widget.template['sealImagePath']).readAsBytes();



  final listNormal = ['Foo', 'Bar', 'Baz'];
  final listBold = ['ooF', 'raB', 'zaB'];
  final contentList = <Content>[];
  final bold = listBold.iterator;
  for (var n in listNormal) {
    bold.moveNext();
    final plainContent = PlainContent('value')
      ..add(TextContent('normal', n))
      ..add(TextContent('bold', bold.current));
    contentList.add(plainContent);
  }

  Content content = Content();
  content
    ..add(TextContent('docname', 'Simple docname'))
    ..add(TextContent('passport', 'Passport NE0323 4456673'))
    ..add(TableContent('table', [
      RowContent()
        ..add(TextContent('key1', 'Paul'))
        ..add(TextContent('key2', 'Viberg'))
        ..add(TextContent('key3', 'Engineer'))
        ..add(ImageContent('img', imageBytes)),
      RowContent()
        ..add(TextContent('key1', 'Alex'))
        ..add(TextContent('key2', 'Houser'))
        ..add(TextContent('key3', 'CEO & Founder'))
        ..add(ListContent('tablelist', [
          TextContent('value', 'Mercedes-Benz C-Class S205'),
          TextContent('value', 'Lexus LX 570')
        ]))
        ..add(ImageContent('img', imageBytes))
    ]))
    ..add(ListContent('list', [
      TextContent('value', 'Engine')
        ..add(ListContent('listnested', contentList)),
      TextContent('value', 'Gearbox'),
      TextContent('value', 'Chassis')
    ]))
    ..add(ListContent('plainlist', [
      PlainContent('plainview')
        ..add(TableContent('table', [
          RowContent()
            ..add(TextContent('key1', 'Paul'))
            ..add(TextContent('key2', 'Viberg'))
            ..add(TextContent('key3', 'Engineer')),
          RowContent()
            ..add(TextContent('key1', 'Alex'))
            ..add(TextContent('key2', 'Houser'))
            ..add(TextContent('key3', 'CEO & Founder'))
            ..add(ListContent('tablelist', [
              TextContent('value', 'Mercedes-Benz C-Class S205'),
              TextContent('value', 'Lexus LX 570')
            ]))
        ])),
      PlainContent('plainview')
        ..add(TableContent('table', [
          RowContent()
            ..add(TextContent('key1', 'Nathan'))
            ..add(TextContent('key2', 'Anceaux'))
            ..add(TextContent('key3', 'Music artist'))
            ..add(ListContent(
                'tablelist', [TextContent('value', 'Peugeot 508')])),
          RowContent()
            ..add(TextContent('key1', 'Louis'))
            ..add(TextContent('key2', 'Houplain'))
            ..add(TextContent('key3', 'Music artist'))
            ..add(ListContent('tablelist', [
              TextContent('value', 'Range Rover Velar'),
              TextContent('value', 'Lada Vesta SW Sport')
            ]))
        ])),
    ]))
    ..add(ListContent('multilineList', [
      PlainContent('multilinePlain')
        ..add(TextContent('multilineText', 'line 1')),
      PlainContent('multilinePlain')
        ..add(TextContent('multilineText', 'line 2')),
      PlainContent('multilinePlain')
        ..add(TextContent('multilineText', 'line 3'))
    ]))
    ..add(TextContent('multilineText2', 'line 1\nline 2\n line 3'))
    ..add(ImageContent('img', imageBytes));
  // 生成 Word 文档，根据传入的 Content 对象进行替换占位符
  final docGenerated = await docx.generate(content);

  // print('docGenerated的类型是：${docGenerated.runtimeType}');


  // 获取存储目录
  final directory = await getApplicationDocumentsDirectory();
  // 生成路径
  final outputFile = File('${directory.path}/generated_docx_with_replaced_content.docx');
    
  if (docGenerated != null) {
    // 写入文件
    await outputFile.writeAsBytes(docGenerated);

  // 创建 PDF 文档
  final pdf = pw.Document();

  // 从 Word 文件中读取内容，并添加到 PDF 文档中
  final wordFile = File(outputFile.path);
  
  print('Word 文件路径: ${wordFile.path}');

  // 将 Word 文件内容转换为 Uint8List
  final wordBytes = await wordFile.readAsBytes();

  print('Word 文件内容: $wordBytes');
  
  // 使用临时文件创建 pw.Image
    final tempImage = pw.MemoryImage(
      Uint8List.fromList(wordBytes),
    );

    // 添加图像到 PDF 文档中
    pdf.addPage(
      pw.Page(
        build: (pw.Context context) {
          return pw.Center(
            child: pw.Image(tempImage),
          );
        },
      ),
    );

    // 保存 PDF 文件路径以便稍后使用
    setState(() {
      pdfFilePath = outputFile.path;
    });
  }

} catch (e, stackTrace) {
print('Exception: $e');
print('StackTrace: $stackTrace'); // 调用方法获取堆栈跟踪
}
}
} 此代码在把生成的带有图片的word转换为pdf时一直报错I/flutter ( 3281): Exception: Exception: Unable to guess the image type 1311710 bytes!请问哪位大神帮解决一下!万分感谢!