init
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366
example/lib/main.dart
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366
example/lib/main.dart
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import 'package:flutter/material.dart';
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import 'dart:async';
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import 'package:flutter/services.dart';
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import 'package:idcard/idcard.dart';
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import 'package:idcard/idcard_platform_interface.dart';
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void main() {
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runApp(const MyApp());
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}
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class MyApp extends StatefulWidget {
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const MyApp({super.key});
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@override
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State<MyApp> createState() => _MyAppState();
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}
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class _MyAppState extends State<MyApp> {
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String _platformVersion = 'Unknown';
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String _status = '未连接';
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IdCardInfo? _cardInfo;
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bool _isReading = false;
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bool _isLoading = false;
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bool _isConnected = false;
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String _statusMessage = '未连接';
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final _idcardPlugin = Idcard();
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final String _portType = "USB";
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final String _portPara = "0400C35A";
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final String _portExtend = "MI";
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@override
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void initState() {
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super.initState();
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initPlatformState();
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}
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/// 初始化平台状态
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Future<void> initPlatformState() async {
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String platformVersion;
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try {
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platformVersion = await _idcardPlugin.getPlatformVersion() ?? 'Unknown platform version';
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} on PlatformException {
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platformVersion = 'Failed to get platform version.';
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}
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if (!mounted) return;
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setState(() {
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_platformVersion = platformVersion;
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});
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}
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/// 连接设备
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Future<void> _connectDevice() async {
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setState(() {
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_isLoading = true;
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_statusMessage = '正在连接设备...';
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_status = '正在连接设备...';
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});
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try {
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// 首先获取USB权限
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setState(() {
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_statusMessage = '正在请求USB权限...';
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_status = '正在请求USB权限...';
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});
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// int vid = int.parse(portPara.substring(0, 4), radix: 16);
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// int pid = int.parse(portPara.substring(4, 8), radix: 16);
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final permissionResult = await _idcardPlugin.getUsbPermission(vid: int.parse(_portPara.substring(0, 4), radix: 16), pid: int.parse(_portPara.substring(4, 8), radix: 16));
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if (permissionResult != 0) {
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throw Exception('获取USB权限失败: $permissionResult');
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}
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// 打开设备
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setState(() {
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_statusMessage = '正在打开设备...';
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_status = '正在打开设备...';
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});
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// "USB", "0400C35A", "MI";
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final openResult = await _idcardPlugin.openDevice(portType: _portType, portPara: _portPara, extendPara: _portExtend);
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print("设备句柄：$openResult");
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if (openResult <= 0) {
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throw Exception('打开设备失败: $openResult');
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}
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setState(() {
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_isConnected = true;
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_statusMessage = '设备连接成功';
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_status = '设备连接成功';
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});
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} on PlatformException catch (e) {
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String errorMessage = '连接失败: ${e.message}';
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// 针对不同错误提供用户友好的提示
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if (e.code == 'PERMISSION_DENIED') {
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errorMessage = 'USB权限被拒绝。\n\n解决方法：\n1. 请在弹出的权限对话框中点击"允许"\n2. 或者在系统设置中手动授权USB权限\n3. 确保设备已正确连接';
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} else if (e.code == 'DEVICE_NOT_FOUND') {
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errorMessage = '未找到身份证读卡器设备。\n\n请检查：\n1. 设备是否已连接\n2. 设备驱动是否正常\n3. VID/PID是否正确';
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}
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setState(() {
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_statusMessage = errorMessage;
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_status = errorMessage;
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_isConnected = false;
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});
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} catch (e) {
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setState(() {
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_statusMessage = '连接失败: $e';
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_status = '连接失败: $e';
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_isConnected = false;
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});
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} finally {
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setState(() {
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_isLoading = false;
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});
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}
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}
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/// 断开设备连接
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Future<void> _disconnectDevice() async {
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try {
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await _idcardPlugin.closeDevice();
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setState(() {
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_status = '设备已断开';
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_statusMessage = '设备已断开';
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_isConnected = false;
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_cardInfo = null;
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});
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} catch (e) {
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setState(() {
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_status = '断开连接失败：$e';
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_statusMessage = '断开连接失败：$e';
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});
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}
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}
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/// 读取身份证
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Future<void> _readCard() async {
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if (_isReading) return;
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setState(() {
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_isReading = true;
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_status = '请将身份证放在读卡器上...';
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_cardInfo = null;
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});
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try {
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// 使用完整的读卡流程
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IdCardInfo cardInfo = await _idcardPlugin.readCardComplete();
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print(cardInfo);
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setState(() {
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_cardInfo = cardInfo;
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_status = '读卡成功';
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_isReading = false;
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});
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} catch (e) {
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setState(() {
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_status = '读卡失败：$e';
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_isReading = false;
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});
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}
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}
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/// 构建身份证信息显示卡片
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Widget _buildCardInfoWidget() {
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if (_cardInfo == null) {
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return const SizedBox.shrink();
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}
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return Card(
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margin: const EdgeInsets.all(16),
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'身份证信息',
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style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
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),
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const SizedBox(height: 16),
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_buildInfoRow('姓名', _cardInfo!.name),
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_buildInfoRow('性别', _cardInfo!.gender),
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_buildInfoRow('民族', _cardInfo!.nation),
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_buildInfoRow('出生日期', _cardInfo!.birthDate),
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_buildInfoRow('身份证号', _cardInfo!.idNumber),
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_buildInfoRow('地址', _cardInfo!.address),
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_buildInfoRow('签发机关', _cardInfo!.signOrgan),
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_buildInfoRow('有效期', _cardInfo!.validTerm),
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if (_cardInfo!.photo != null) ...[
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const SizedBox(height: 16),
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const Text('照片：'),
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const SizedBox(height: 8),
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Container(
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width: 120,
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height: 160,
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decoration: BoxDecoration(
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border: Border.all(color: Colors.grey),
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borderRadius: BorderRadius.circular(8),
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),
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child: Image.memory(
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Uint8List.fromList(_cardInfo!.photo!),
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fit: BoxFit.cover,
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errorBuilder: (context, error, stackTrace) {
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return const Center(
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child: Text('照片加载失败'),
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);
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},
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),
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),
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],
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],
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),
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),
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);
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}
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/// 构建信息行
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Widget _buildInfoRow(String label, String value) {
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return Padding(
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padding: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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SizedBox(
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width: 80,
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child: Text(
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'$label：',
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style: const TextStyle(fontWeight: FontWeight.w500),
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),
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),
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Expanded(
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child: Text(value),
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),
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],
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),
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);
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}
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: '身份证读卡器示例',
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theme: ThemeData(
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primarySwatch: Colors.blue,
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useMaterial3: true,
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),
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home: Scaffold(
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appBar: AppBar(
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title: const Text('身份证读卡器示例'),
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backgroundColor: Theme.of(context).colorScheme.inversePrimary,
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),
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body: SingleChildScrollView(
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child: Column(
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children: [
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// 平台信息
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Card(
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margin: const EdgeInsets.all(16),
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'平台信息',
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style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
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),
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const SizedBox(height: 8),
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Text('运行平台：$_platformVersion'),
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const SizedBox(height: 8),
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Text('设备状态：$_status'),
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],
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),
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),
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),
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// 操作按钮
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 16),
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child: Row(
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children: [
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Expanded(
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child: ElevatedButton(
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onPressed: (_isLoading || _isConnected) ? null : _connectDevice,
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child: _isLoading
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? const Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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SizedBox(
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width: 16,
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height: 16,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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),
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),
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SizedBox(width: 8),
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Text('连接中...'),
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],
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)
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: const Text('连接设备'),
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),
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),
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const SizedBox(width: 16),
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Expanded(
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child: ElevatedButton(
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onPressed: (_isLoading || !_isConnected) ? null : _disconnectDevice,
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child: const Text('断开连接'),
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),
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),
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],
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),
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),
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const SizedBox(height: 16),
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// 读卡按钮
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 16),
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child: SizedBox(
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width: double.infinity,
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child: ElevatedButton(
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onPressed: (_isReading || !_isConnected || _isLoading) ? null : _readCard,
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.green,
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(vertical: 16),
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),
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child: _isReading
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? const Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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valueColor: AlwaysStoppedAnimation<Color>(Colors.white),
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),
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),
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SizedBox(width: 8),
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Text('正在读卡...'),
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],
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)
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: const Text(
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'读取身份证',
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style: TextStyle(fontSize: 16),
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),
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),
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),
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),
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// 身份证信息显示
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_buildCardInfoWidget(),
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],
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),
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),
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),
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);
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}
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}
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