Flutter SDK更新管理插件cs50sdkupdate的使用

Flutter SDK更新管理插件cs50sdkupdate的使用

目录


安装

pubspec.yaml 文件中添加以下依赖项:

dependencies:
  cs50sdkupdate: ^1.0.0

然后运行 flutter pub get 来安装包。


使用

将包导入到 Dart 代码中:

import 'package:cs50sdkupdate/cs50sdkupdate.dart';

初始化插件并在 Flutter 应用程序中使用其功能。以下是基本示例:

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:cs50sdkupdate/cs50sdkupdate.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'CS50 SDK Update Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        brightness: Brightness.light,
        fontFamily: 'Roboto',
      ),
      home: const HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);

  [@override](/user/override)
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final _cs50sdkupdatePlugin = Cs50sdkupdate();

  [@override](/user/override)
  void initState() {
    super.initState();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    // 构建UI
  }
}

功能

初始化

初始化平台和各种组件:

  • 获取平台版本:检索平台版本。
  • 初始化PICC:初始化PICC。
PICC操作

与PICC相关的操作:

  • 关闭PICC:关闭PICC。
  • 移除PICC:移除PICC。
  • PICC检查:检查PICC状态。
  • 开始轮询:开始轮询PICC数据。
命令执行

执行各种系统和NFC命令:

  • 执行命令:运行系统命令。
  • SAM AV2初始化:初始化SAM AV2。
  • 执行NFC:执行NFC命令。
打印机初始化

初始化和配置打印机:

  • 初始化打印机:初始化打印机。
  • 使用参数初始化:使用特定参数初始化打印机。
打印机设置

配置打印机设置:

  • 设置字体:设置打印机字体。
  • 设置灰度:设置打印灰度。
  • 设置间距:配置间距。
  • 获取字体:获取当前字体设置。
  • 设置步长:设置打印步长。
  • 设置电压:配置打印机电压。
  • 设置充电状态:设置充电状态。
  • 设置行像素:配置行像素距离。
  • 设置左缩进:设置打印左缩进。
  • 设置对齐方式:配置文本对齐方式。
  • 设置字符间距:设置字符间距。
  • 设置行间距:配置行间距。
  • 设置左边距:设置打印左边距。
  • 设置打印速度:配置打印速度。
  • 设置打印模式:设置打印模式。
  • 设置下划线:启用或禁用下划线。
  • 设置反向打印:启用或禁用反向打印。
  • 设置粗体打印:启用或禁用粗体打印。
打印操作

执行各种打印任务:

  • 打印文本:打印文本字符串。
  • 打印位图:打印位图图像。
  • 打印条形码:打印条形码。
  • 打印二维码:打印二维码。
  • 打印带文本的二维码:打印带有文本的二维码。
  • 开始打印:开始打印过程。
  • 打印徽标:打印徽标。
  • 打印所有文本:打印所有排队的文本。
  • 打印PDF:打印PDF文件。
  • 打印现有PDF:打印现有的PDF文件。
  • 创建并打印简单的PDF:创建并打印简单的PDF文档。
打印机实用工具

打印机的实用工具函数:

  • 检查状态:检查打印机状态。
  • 进纸:通过打印机进纸。
  • 定位标签:定位标签位置。
  • 打印状态:显示打印状态。

示例

这是一个完整的示例,演示了各种功能:

import 'dart:io';

import 'package:cs50sdkupdate_example/pdf_printer.dart';
import 'package:cs50sdkupdate_example/print_status_screen.dart';
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:cs50sdkupdate/cs50sdkupdate.dart';
import 'package:path_provider/path_provider.dart';
import 'editor.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'CS50 SDK Update Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
        brightness: Brightness.light,
        fontFamily: 'Roboto',
      ),
      home: const HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);

  [@override](/user/override)
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  String _platformVersion = 'Unknown';
  String _pollingData = 'No data';
  String _printStatus = 'Printer not initialized';
  String _piccStatus = 'PICC not initialized';
  final _cs50sdkupdatePlugin = Cs50sdkupdate();
  late PrintJobManager _printJobManager;

  [@override](/user/override)
  void initState() {
    super.initState();
    _printJobManager = PrintJobManager(_cs50sdkupdatePlugin);
  }

  Future<void> _getPlatformVersion() async {
    String platformVersion;
    try {
      platformVersion = await _cs50sdkupdatePlugin.getPlatformVersion() ?? 'Unknown platform version';
      _showSnackBar('Platform version: $platformVersion');
    } on PlatformException {
      _showSnackBar('Failed to get platform version.');
      platformVersion = 'Failed to get platform version.';
    }

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  Future<void> initializePicc() async {
    try {
      await _cs50sdkupdatePlugin.openPicc();
      setState(() {
        _piccStatus = 'PICC initialized';
      });
      _showSnackBar('PICC initialized successfully.');
    } on PlatformException {
      setState(() {
        _piccStatus = 'Failed to initialize PICC';
      });
      _showSnackBar('Failed to initialize PICC.');
    }
  }

  Future<void> closePicc() async {
    try {
      await _cs50sdkupdatePlugin.piccClose();
      setState(() {
        _piccStatus = 'PICC closed';
      });
      _showSnackBar('PICC closed.');
    } on PlatformException {
      _showSnackBar('Failed to close PICC.');
    }
  }

  Future<void> removePicc() async {
    try {
      await _cs50sdkupdatePlugin.piccRemove();
      setState(() {
        _piccStatus = 'PICC removed';
      });
      _showSnackBar('PICC removed.');
    } on PlatformException {
      _showSnackBar('Failed to remove PICC.');
    }
  }

  Future<void> piccCheck() async {
    String piccCheckData;
    try {
      piccCheckData = await _cs50sdkupdatePlugin.piccCheck() ?? 'No data';
      _showSnackBar('PICC Check: $piccCheckData');
    } on PlatformException {
      _showSnackBar('Failed to check PICC.');
      piccCheckData = 'Failed to check PICC.';
    }

    setState(() {
      _pollingData = piccCheckData;
    });
  }

  Future<void> startPolling() async {
    String pollingData;
    try {
      pollingData = await _cs50sdkupdatePlugin.piccPolling() ?? 'No data';
      _showSnackBar('Polling data: $pollingData');
    } on PlatformException {
      _showSnackBar('Failed to poll data.');
      pollingData = 'Failed to poll data.';
    }

    setState(() {
      _pollingData = pollingData;
    });
  }

  Future<void> executeCommands() async {
    String? apiVersion = await _cs50sdkupdatePlugin.sysApiVerson();
    String? deviceId = await _cs50sdkupdatePlugin.getDeviceId();
    _showSnackBar('API version: $apiVersion\nDevice ID: $deviceId');
  }

  Future<void> executePiccSamAv2Init() async {
    int samSlotNo = 1;
    List<int> samHostKey = List.filled(16, 0);
    try {
      String? samInitResponse = await _cs50sdkupdatePlugin.piccSamAv2Init(samSlotNo, samHostKey);
      _showSnackBar('SAM AV2 Init Response: $samInitResponse');
    } catch (e) {
      _showSnackBar('Failed to initialize SAM AV2: $e');
    }
  }

  Future<void> executeNfc() async {
    List<int> nfcDataLen = List.filled(5, 0);
    List<int> technology = List.filled(25, 0);
    List<int> nfcUid = List.filled(56, 0);
    List<int> ndefMessage = List.filled(500, 0);

    try {
      String? nfcResponse = await _cs50sdkupdatePlugin.piccNfc(nfcDataLen, technology, nfcUid, ndefMessage);
      _showSnackBar('NFC Response: $nfcResponse');
    } catch (e) {
      _showSnackBar('Failed to execute NFC: $e');
    }
  }

  // 打印函数
  Future<void> _initPrinter() async {
    try {
      await _cs50sdkupdatePlugin.printInit();
      setState(() {
        _printStatus = 'Printer initialized';
      });
      _showSnackBar('Printer initialized');
    } catch (e) {
      setState(() {
        _printStatus = 'Failed to initialize printer: $e';
      });
      _showSnackBar('Failed to initialize printer: $e');
    }
  }

  Future<void> _printText() async {
    try {
      await _cs50sdkupdatePlugin.printStr('Hello, World!\n');
      await _cs50sdkupdatePlugin.printStr('This is a test print.\n');

      await _printJobManager.printAllPages();
      _showSnackBar('Text printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print text: $e');
    }
  }

  Future<void> _printBarcode() async {
    try {
      await _cs50sdkupdatePlugin.printBarcode('1234567890', 300, 100, 'CODE_128');
      await _cs50sdkupdatePlugin.printStart();
      _showSnackBar('Barcode printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print barcode: $e');
    }
  }

  Future<void> _printQRCode() async {
    try {
      await _cs50sdkupdatePlugin.printQrCode('https://example.com', 200, 200, 'QR_CODE');
      await _cs50sdkupdatePlugin.printStart();
      _showSnackBar('QR Code printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print QR Code: $e');
    }
  }

  Future<void> _initPrinterWithParams() async {
    try {
      await _cs50sdkupdatePlugin.printInitWithParams(50, 24, 24, 0);
      _showSnackBar('Printer initialized with parameters');
    } catch (e) {
      _showSnackBar('Failed to initialize printer with parameters: $e');
    }
  }

  Future<void> _printSetFont() async {
    try {
      await _cs50sdkupdatePlugin.printSetFont(24, 24, 0);
      _showSnackBar('Font set successfully');
    } catch (e) {
      _showSnackBar('Failed to set font: $e');
    }
  }

  Future<void> _printSetGray() async {
    try {
      await _cs50sdkupdatePlugin.printSetGray(50);
      _showSnackBar('Gray level set successfully');
    } catch (e) {
      _showSnackBar('Failed to set gray level: $e');
    }
  }

  Future<void> _printSetSpace() async {
    try {
      await _cs50sdkupdatePlugin.printSetSpace(0, 0);
      _showSnackBar('Space set successfully');
    } catch (e) {
      _showSnackBar('Failed to set space: $e');
    }
  }

  Future<void> _printGetFont() async {
    try {
      String? font = await _cs50sdkupdatePlugin.printGetFont();
      _showSnackBar('Current font: $font');
    } catch (e) {
      _showSnackBar('Failed to get font: $e');
    }
  }

  Future<void> _printStep() async {
    try {
      await _cs50sdkupdatePlugin.printStep(100);
      _showSnackBar('Step printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print step: $e');
    }
  }

  Future<void> _printSetVoltage() async {
    try {
      await _cs50sdkupdatePlugin.printSetVoltage(7);
      _showSnackBar('Voltage set successfully');
    } catch (e) {
      _showSnackBar('Failed to set voltage: $e');
    }
  }

  Future<void> _printIsCharge() async {
    try {
      await _cs50sdkupdatePlugin.printIsCharge(1);
      _showSnackBar('Charge status set successfully');
    } catch (e) {
      _showSnackBar('Failed to set charge status: $e');
    }
  }

  Future<void> _printSetLinPixelDis() async {
    try {
      await _cs50sdkupdatePlugin.printSetLinPixelDis(384);
      _showSnackBar('Line pixel distance set successfully');
    } catch (e) {
      _showSnackBar('Failed to set line pixel distance: $e');
    }
  }

  Future<void> _printStr() async {
    try {
      await _cs50sdkupdatePlugin.printStr('Hello, World!\n');
      _showSnackBar('Text printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print text: $e');
    }
  }

  Future<void> _printBmp() async {
    // 注意:您需要提供实际的位图数据
    try {
      Uint8List bmpData = Uint8List(0); // 替换为实际的位图数据
      await _cs50sdkupdatePlugin.printBmp(bmpData);
      _showSnackBar('Bitmap printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print bitmap: $e');
    }
  }

  Future<void> _printCutQRCodeStr() async {
    try {
      await _cs50sdkupdatePlugin.printCutQrCodeStr('https://example.com', 'Scan me!', 10, 200, 200, 'QR_CODE');
      _showSnackBar('QR Code with text printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print QR Code with text: $e');
    }
  }

  Future<void> _printStart() async {
    try {
      await _cs50sdkupdatePlugin.printStart();
      _showSnackBar('Print started successfully');
    } catch (e) {
      _showSnackBar('Failed to start print: $e');
    }
  }

  Future<void> _printSetLeftIndent() async {
    try {
      await _cs50sdkupdatePlugin.printSetLeftIndent(10);
      _showSnackBar('Left indent set successfully');
    } catch (e) {
      _showSnackBar('Failed to set left indent: $e');
    }
  }

  Future<void> _printSetAlign() async {
    try {
      await _cs50sdkupdatePlugin.printSetAlign(1); // 0: 左对齐, 1: 居中, 2: 右对齐
      _showSnackBar('Alignment set successfully');
    } catch (e) {
      _showSnackBar('Failed to set alignment: $e');
    }
  }

  Future<void> _printCharSpace() async {
    try {
      await _cs50sdkupdatePlugin.printCharSpace(1);
      _showSnackBar('Character space set successfully');
    } catch (e) {
      _showSnackBar('Failed to set character space: $e');
    }
  }

  Future<void> _printSetLineSpace() async {
    try {
      await _cs50sdkupdatePlugin.printSetLineSpace(50);
      _showSnackBar('Line space set successfully');
    } catch (e) {
      _showSnackBar('Failed to set line space: $e');
    }
  }

  Future<void> _printSetLeftSpace() async {
    try {
      await _cs50sdkupdatePlugin.printSetLeftSpace(10);
      _showSnackBar('Left space set successfully');
    } catch (e) {
      _showSnackBar('Failed to set left space: $e');
    }
  }

  Future<void> _printSetSpeed() async {
    try {
      await _cs50sdkupdatePlugin.printSetSpeed(5);
      _showSnackBar('Print speed set successfully');
    } catch (e) {
      _showSnackBar('Failed to set print speed: $e');
    }
  }

  Future<void> _printCheckStatus() async {
    try {
      String? status = await _cs50sdkupdatePlugin.printCheckStatus();
      _showSnackBar('Printer status: $status');
    } catch (e) {
      _showSnackBar('Failed to check printer status: $e');
    }
  }

  Future<void> _printFeedPaper() async {
    try {
      await _cs50sdkupdatePlugin.printFeedPaper(100);
      _showSnackBar('Paper fed successfully');
    } catch (e) {
      _showSnackBar('Failed to feed paper: $e');
    }
  }

  Future<void> _printSetMode() async {
    try {
      await _cs50sdkupdatePlugin.printSetMode(0); // 0: 正常, 1: 白底黑字
      _showSnackBar('Print mode set successfully');
    } catch (e) {
      _showSnackBar('Failed to set print mode: $e');
    }
  }

  Future<void> _printSetUnderline() async {
    try {
      await _cs50sdkupdatePlugin.printSetUnderline(1); // 0: 关闭, 1: 开启
      _showSnackBar('Underline set successfully');
    } catch (e) {
      _showSnackBar('Failed to set underline: $e');
    }
  }

  Future<void> _printSetReverse() async {
    try {
      await _cs50sdkupdatePlugin.printSetReverse(1); // 0: 关闭, 1: 开启
      _showSnackBar('Reverse print set successfully');
    } catch (e) {
      _showSnackBar('Failed to set reverse print: $e');
    }
  }

  Future<void> _printSetBold() async {
    try {
      await _cs50sdkupdatePlugin.printSetBold(1); // 0: 关闭, 1: 开启
      _showSnackBar('Bold print set successfully');
    } catch (e) {
      _showSnackBar('Failed to set bold print: $e');
    }
  }

  Future<void> _printLogo() async {
    // 注意:您需要提供实际的徽标数据
    try {
      Uint8List logoData = Uint8List.fromList([
        0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, // 第一行
        0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, // 第二行
        0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, // 第三行
        0xFF, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, // 第四行
        0xFF, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, // 第五行
        0xFF, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, // 第六行
        0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, // 第七行
        0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, // 第八行
        0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, // 第九行
      ]);

      await _cs50sdkupdatePlugin.printLogo(logoData);
      _showSnackBar('Logo printed successfully');
    } catch (e) {
      _showSnackBar('Failed to print logo: $e');
    }
  }

  Future<void> _printLabLocate() async {
    try {
      await _cs50sdkupdatePlugin.printLabLocate(100);
      _showSnackBar('Label located successfully');
    } catch (e) {
      _showSnackBar('Failed to locate label: $e');
    }
  }

  void _showSnackBar(String message) {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
      content: Text(message),
      duration: const Duration(seconds: 3),
    ));
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('CS50 SDK Update Demo'),
        elevation: 0,
      ),
      body: Container(
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
            colors: [Colors.blue.shade100, Colors.blue.shade300],
          ),
        ),
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              Card(
                elevation: 5,
                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15)),
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    children: [
                      Text('Platform: $_platformVersion', style: const TextStyle(fontSize: 16)),
                      const SizedBox(height: 8),
                      Text('PICC Status: $_piccStatus', style: const TextStyle(fontSize: 16)),
                      const SizedBox(height: 8),
                      Text('Polling: $_pollingData', style: const TextStyle(fontSize: 16)),
                      const SizedBox(height: 8),
                      Text('Printer: $_printStatus', style: const TextStyle(fontSize: 16)),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 16),
              _buildSection('初始化', [
                _buildButton(Icons.power_settings_new, '获取平台版本', _getPlatformVersion),
                _buildButton(Icons.nfc, '初始化PICC', initializePicc),
              ]),
              const SizedBox(height: 16),
              _buildSection('PICC操作', [
                _buildButton(Icons.close, '关闭PICC', closePicc),
                _buildButton(Icons.remove_circle, '移除PICC', removePicc),
                _buildButton(Icons.check_circle, 'PICC检查', piccCheck),
                _buildButton(Icons.loop, '开始轮询', startPolling),
              ]),
              const SizedBox(height: 16),
              _buildSection('其他操作', [
                _buildButton(Icons.code, '执行命令', executeCommands),
                _buildButton(Icons.memory, 'SAM AV2初始化', executePiccSamAv2Init),
                _buildButton(Icons.nfc, '执行NFC', executeNfc),
              ]),
              const SizedBox(height: 16),
              _buildSection('打印机初始化', [
                _buildButton(Icons.print, '初始化打印机', _initPrinter),
                _buildButton(Icons.settings, '使用参数初始化', _initPrinterWithParams),
              ]),
              const SizedBox(height: 16),
              _buildSection('打印机设置', [
                _buildButton(Icons.font_download, '设置字体', _printSetFont),
                _buildButton(Icons.format_color_fill, '设置灰度', _printSetGray),
                _buildButton(Icons.space_bar, '设置间距', _printSetSpace),
                _buildButton(Icons.font_download_outlined, '获取字体', _printGetFont),
                _buildButton(Icons.height, '设置步长', _printStep),
                _buildButton(Icons.battery_charging_full, '设置电压', _printSetVoltage),
                _buildButton(Icons.power, '设置充电状态', _printIsCharge),
                _buildButton(Icons.linear_scale, '设置行像素', _printSetLinPixelDis),
                _buildButton(Icons.format_align_left, '设置左缩进', _printSetLeftIndent),
                _buildButton(Icons.format_align_center, '设置对齐方式', _printSetAlign),
                _buildButton(Icons.space_bar_outlined, '设置字符间距', _printCharSpace),
                _buildButton(Icons.format_line_spacing, '设置行间距', _printSetLineSpace),
                _buildButton(Icons.format_indent_increase, '设置左边距', _printSetLeftSpace),
                _buildButton(Icons.speed, '设置打印速度', _printSetSpeed),
                _buildButton(Icons.mode, '设置打印模式', _printSetMode),
                _buildButton(Icons.format_underlined, '设置下划线', _printSetUnderline),
                _buildButton(Icons.flip, '设置反向打印', _printSetReverse),
                _buildButton(Icons.format_bold, '设置粗体打印', _printSetBold),
                _buildButton(Icons.edit_note_outlined, '文档编辑器', _openEditor)
              ]),
              const SizedBox(height: 16),
              _buildSection('打印操作', [
                _buildButton(Icons.text_fields, '打印文本', _printStr),
                _buildButton(Icons.image, '打印位图', _printBmp),
                _buildButton(Icons.qr_code, '打印条形码', _printBarcode),
                _buildButton(Icons.qr_code_2, '打印二维码', _printQRCode),
                _buildButton(Icons.qr_code_scanner, '打印带文本的二维码', _printCutQRCodeStr),
                _buildButton(Icons.play_arrow, '开始打印', _printStart),
                _buildButton(Icons.logo_dev, '打印徽标', _printLogo),
                _buildButton(Icons.text_snippet_rounded, '打印所有文本', _printText),
                _buildButton(Icons.picture_as_pdf, '打印PDF', _printPdf),
                _buildButton(Icons.picture_as_pdf, '打印现有PDF', _printExistingPdf),
                _buildButton(Icons.add_to_photos, '创建并打印简单的PDF', _createAndPrintSimplePdf),
              ]),
              const SizedBox(height: 16),
              _buildSection('打印机实用工具', [
                _buildButton(Icons.check_circle_outline, '检查状态', _printCheckStatus),
                _buildButton(Icons.vertical_align_bottom, '进纸', _printFeedPaper),
                _buildButton(Icons.label_outline, '定位标签', _printLabLocate),
                _buildButton(Icons.list, '打印状态', _openPrintStatusScreen),
              ]),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildSection(String title, List<Widget> children) {
    return Card(
      elevation: 3,
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15)),
      child: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(title, style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
            const SizedBox(height: 12),
            Wrap(
              spacing: 8,
              runSpacing: 8,
              children: children,
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildButton(IconData icon, String label, VoidCallback onPressed) {
    return ElevatedButton.icon(
      icon: Icon(icon),
      label: Text(label),
      onPressed: onPressed,
      style: ElevatedButton.styleFrom(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(30)),
      ),
    );
  }

  void _openEditor() {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => CustomDocumentEditor(
          printPlugin: _cs50sdkupdatePlugin,
          jobManager: _printJobManager,
        ),
      ),
    );
  }

  void _openPrintStatusScreen() {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => ModernPrintStatusScreen(jobManager: _printJobManager),
      ),
    );
  }

  Future<void> _printExistingPdf() async {
    try {
      // 对于此示例,我们将使用资源文件夹中的PDF文件
      // 确保在您的assets中添加一个PDF文件,并相应地更新pubspec.yaml
      final byteData = await rootBundle.load('assets/KAT_03_07_2024_18-Batches.pdf');
      final tempDir = await getTemporaryDirectory();
      final tempFile = File('${tempDir.path}/temp.pdf');
      await tempFile.writeAsBytes(byteData.buffer.asUint8List());

      await _printJobManager.printPdf(tempFile.path);
      _showSnackBar('PDF打印开始');

      // 打开打印状态屏幕
      _openPrintStatusScreen();
    } catch (e) {
      _showSnackBar('打印PDF失败: $e');
    }
  }

  Future<void> _createAndPrintSimplePdf() async {
    try {
      _showSnackBar('简单PDF创建并开始打印');
      // _pdfPrinter.createAndPrintSimplePdf();
      _printJobManager.printImagePdf();
      // 打开打印状态屏幕
      _openPrintStatusScreen();
    } catch (e) {
      _showSnackBar('创建并打印简单PDF失败: $e');
    }
  }

  Future<void> _printPdf() async {
    try {
      // 对于此示例,我们将使用资源文件夹中的PDF文件
      // 确保在您的assets中添加一个PDF文件,并相应地更新pubspec.yaml
      final byteData = await rootBundle.load('assets/KAT_03_07_2024_18-Batches.pdf');
      final tempDir = await getTemporaryDirectory();
      final tempFile = File('${tempDir.path}/temp.pdf');
      await tempFile.writeAsBytes(byteData.buffer.asUint8List());

      await _printJobManager.printPdf(tempFile.path);
      //
      // await _pdfPrinter.printPdf(tempFile.path);
      // await _pdfPrinter.printImagePdf();
      _showSnackBar('PDF打印开始');

      // 打开打印状态屏幕
      _openPrintStatusScreen();
    } catch (e) {
      _showSnackBar('打印PDF失败: $e');
    }
  }
}

更多关于Flutter SDK更新管理插件cs50sdkupdate的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter SDK更新管理插件cs50sdkupdate的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


在Flutter中管理SDK更新是一个重要的任务,特别是当你需要确保应用使用的库和插件始终是最新的。cs50sdkupdate这个插件(假设它存在,因为实际上Flutter生态系统中并没有一个广泛认知的名为cs50sdkupdate的插件)可能是一个用于管理SDK更新的自定义插件。不过,我们可以讨论一个类似的通用方案,使用Flutter和Dart代码来实现SDK更新管理功能。

由于cs50sdkupdate不是标准Flutter插件,我将提供一个使用Flutter和Dart的示例代码,展示如何检查依赖项的版本并提示用户更新。这个示例不会直接涉及到cs50sdkupdate插件,但会展示一个管理依赖项更新的通用方法。

步骤 1: 添加依赖项检查逻辑

首先,我们需要在pubspec.yaml文件中列出所有依赖项。然后,我们可以编写一个Dart脚本来检查这些依赖项是否有新版本可用。

pubspec.yaml 示例

name: my_flutter_app
description: A new Flutter application.
version: 1.0.0+1

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  http: ^0.13.3  # 示例依赖项
  provider: ^6.0.0  # 另一个示例依赖项

dev_dependencies:
  flutter_test:
    sdk: flutter

检查依赖项更新的 Dart 脚本

虽然Flutter本身没有直接提供检查pub包更新的API,但你可以使用命令行工具结合Dart的Process类来实现这一功能。以下是一个简单的示例,展示如何检查httpprovider包是否有新版本。

import 'dart:io';

void main() async {
  List<String> packagesToCheck = ['http', 'provider'];

  for (var package in packagesToCheck) {
    ProcessResult result = await Process.run('flutter', ['pub', 'outdated', '--mode=null-safety', '--json']);
    Map<String, dynamic> jsonResult = jsonDecode(result.stdout);
    if (jsonResult['packages']![package] != null) {
      Map<String, dynamic> packageInfo = jsonResult['packages']![package]!;
      String currentVersion = packageInfo['current']!['version']!;
      String latestVersion = packageInfo['latest']!['version']!;
      if (currentVersion != latestVersion) {
        print('Package $package has a new version available: $latestVersion (current: $currentVersion)');
      } else {
        print('Package $package is up to date: $currentVersion');
      }
    }
  }
}

步骤 2: 集成到Flutter应用中

你可以将上述脚本集成到你的Flutter应用中,通过按钮点击或其他触发机制来运行这个脚本,并显示更新信息给用户。

在Flutter中运行脚本的示例

由于直接在Flutter应用中运行Dart脚本有些复杂,通常的做法是通过平台通道调用原生代码(如Android的Java/Kotlin或iOS的Swift/Objective-C),然后在这些原生代码中执行shell命令。但这里为了简化,我们可以考虑使用package:process_run之类的包来封装这个过程(注意,直接在Flutter UI线程中执行长时间运行的进程可能不是最佳实践,应该使用隔离区或后台任务)。

注意事项

  • 上述脚本是一个简化的例子,实际使用中你可能需要处理更多的边缘情况和错误。
  • 在生产环境中,检查依赖项更新通常不会由客户端应用直接完成,而是由构建系统或持续集成/持续部署(CI/CD)管道来处理。
  • 确保你的应用有适当的权限(特别是在iOS上)来执行shell命令。

虽然这个例子没有直接使用cs50sdkupdate插件,但它提供了一个基于Flutter和Dart的通用方法来管理依赖项的更新。如果你确实有一个名为cs50sdkupdate的特定插件,并且需要具体的使用指导,请提供更多关于该插件的信息或文档链接。

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