368 lines
12 KiB
Dart
368 lines
12 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:mobile_scanner/mobile_scanner.dart';
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/// 二维码扫描底部弹窗
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/// 扫描成功后自动关闭并返回扫描结果
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class QrScannerSheet extends StatefulWidget {
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const QrScannerSheet({super.key});
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/// 显示扫码底部弹窗
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/// 返回扫描到的二维码内容，取消或失败返回 null
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static Future<String?> show(BuildContext context) {
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return showModalBottomSheet<String>(
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context: context,
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isScrollControlled: true,
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backgroundColor: Colors.transparent,
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builder: (context) => const QrScannerSheet(),
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);
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}
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@override
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State<QrScannerSheet> createState() => _QrScannerSheetState();
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}
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class _QrScannerSheetState extends State<QrScannerSheet> {
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static const Color _orange = Color(0xFFFF6B00);
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static const Color _darkText = Color(0xFF1F2937);
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final MobileScannerController _controller = MobileScannerController(
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detectionSpeed: DetectionSpeed.normal,
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facing: CameraFacing.back,
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);
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bool _hasScanned = false;
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bool _isPickingImage = false;
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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void _onDetect(BarcodeCapture capture) {
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if (_hasScanned) return;
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final List<Barcode> barcodes = capture.barcodes;
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if (barcodes.isEmpty) return;
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final String? code = barcodes.first.rawValue;
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if (code == null || code.isEmpty) return;
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_hasScanned = true;
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Navigator.of(context).pop(code);
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}
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/// 从相册选择图片识别二维码
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Future<void> _pickImageAndScan() async {
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if (_isPickingImage || _hasScanned) return;
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setState(() => _isPickingImage = true);
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try {
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final picker = ImagePicker();
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final image = await picker.pickImage(source: ImageSource.gallery);
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if (image == null) {
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setState(() => _isPickingImage = false);
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return;
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}
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final BarcodeCapture? capture = await _controller.analyzeImage(image.path);
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if (capture != null && capture.barcodes.isNotEmpty) {
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final code = capture.barcodes.first.rawValue;
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if (code != null && code.isNotEmpty && !_hasScanned) {
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_hasScanned = true;
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if (mounted) Navigator.of(context).pop(code);
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return;
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}
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}
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// 未识别到二维码
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if (mounted) {
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setState(() => _isPickingImage = false);
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('未在图片中识别到二维码'),
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backgroundColor: Colors.red,
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),
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);
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}
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} catch (e) {
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debugPrint('[QR_SCAN] pickImage error: $e');
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if (mounted) {
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setState(() => _isPickingImage = false);
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('图片识别失败，请重试'),
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backgroundColor: Colors.red,
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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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final screenHeight = MediaQuery.of(context).size.height;
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return Container(
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height: screenHeight * 0.7,
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decoration: const BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.only(
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topLeft: Radius.circular(20),
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topRight: Radius.circular(20),
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),
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),
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child: Column(
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children: [
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// 顶部拖动条
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Container(
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margin: const EdgeInsets.only(top: 12),
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width: 40,
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height: 4,
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decoration: BoxDecoration(
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color: Colors.grey[300],
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borderRadius: BorderRadius.circular(2),
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),
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),
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// 标题栏
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Padding(
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padding: const EdgeInsets.all(16),
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child: Row(
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children: [
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IconButton(
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icon: const Icon(Icons.close, color: _darkText),
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onPressed: () => Navigator.of(context).pop(),
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),
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const Expanded(
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child: Text(
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'扫描二维码',
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textAlign: TextAlign.center,
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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color: _darkText,
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),
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),
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),
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// 闪光灯按钮
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IconButton(
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icon: ValueListenableBuilder(
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valueListenable: _controller,
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builder: (context, state, child) {
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return Icon(
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state.torchState == TorchState.on
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? Icons.flash_on
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: Icons.flash_off,
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color: state.torchState == TorchState.on
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? _orange
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: _darkText,
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);
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},
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),
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onPressed: () => _controller.toggleTorch(),
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),
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],
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),
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),
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// 扫描区域
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Expanded(
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child: Container(
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margin: const EdgeInsets.symmetric(horizontal: 32),
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child: ClipRRect(
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borderRadius: BorderRadius.circular(16),
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child: Stack(
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children: [
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// 相机预览
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MobileScanner(
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controller: _controller,
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onDetect: _onDetect,
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),
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// 扫描框装饰
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Center(
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child: Container(
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width: 250,
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height: 250,
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decoration: BoxDecoration(
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border: Border.all(
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color: _orange.withOpacity(0.8),
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width: 2,
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),
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borderRadius: BorderRadius.circular(12),
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),
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),
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),
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// 四角装饰
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Center(
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child: SizedBox(
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width: 250,
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height: 250,
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child: Stack(
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children: [
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// 左上角
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Positioned(
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left: 0,
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top: 0,
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child: _buildCorner(
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borderTop: true,
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borderLeft: true,
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),
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),
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// 右上角
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Positioned(
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right: 0,
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top: 0,
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child: _buildCorner(
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borderTop: true,
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borderRight: true,
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),
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),
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// 左下角
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Positioned(
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left: 0,
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bottom: 0,
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child: _buildCorner(
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borderBottom: true,
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borderLeft: true,
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),
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),
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// 右下角
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Positioned(
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right: 0,
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bottom: 0,
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child: _buildCorner(
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borderBottom: true,
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borderRight: true,
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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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),
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// 提示文字 + 相册按钮
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 16),
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child: Column(
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children: [
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Text(
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'将二维码放入框内，即可自动扫描',
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style: TextStyle(
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fontSize: 14,
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color: Colors.grey[600],
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),
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),
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const SizedBox(height: 12),
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GestureDetector(
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onTap: _isPickingImage ? null : _pickImageAndScan,
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.photo_library_outlined,
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size: 18,
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color: _isPickingImage ? Colors.grey : _orange,
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),
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const SizedBox(width: 6),
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Text(
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_isPickingImage ? '识别中...' : '从相册选择',
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style: TextStyle(
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fontSize: 14,
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color: _isPickingImage ? Colors.grey : _orange,
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fontWeight: FontWeight.w500,
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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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);
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}
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Widget _buildCorner({
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bool borderTop = false,
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bool borderBottom = false,
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bool borderLeft = false,
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bool borderRight = false,
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}) {
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return Container(
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width: 24,
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height: 24,
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decoration: BoxDecoration(
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border: Border(
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top: borderTop
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? const BorderSide(color: _orange, width: 4)
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: BorderSide.none,
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bottom: borderBottom
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? const BorderSide(color: _orange, width: 4)
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: BorderSide.none,
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left: borderLeft
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? const BorderSide(color: _orange, width: 4)
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: BorderSide.none,
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right: borderRight
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? const BorderSide(color: _orange, width: 4)
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: BorderSide.none,
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),
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),
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);
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}
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}
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/// 解析转账二维码
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/// 格式: durian://transfer/?phone={phone} 或 durian://transfer?phone={phone}
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/// 返回手机号，解析失败返回 null
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String? parseTransferQrCode(String qrCode) {
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try {
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// 去除首尾空白及不可见字符（BOM、零宽空格等）
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final trimmed = qrCode.trim().replaceAll(RegExp(r'[\u200B-\u200D\uFEFF\u00A0]'), '');
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debugPrint('[QR_SCAN] raw length=${qrCode.length}, trimmed length=${trimmed.length}');
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debugPrint('[QR_SCAN] raw codeUnits=${qrCode.codeUnits}');
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debugPrint('[QR_SCAN] trimmed="$trimmed"');
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// 方案1：宽松正则 - 只要包含 durian://transfer 和 phone=11位数字
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final regex = RegExp(r'durian://transfer[/?].*?phone=(\d{11})');
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final match = regex.firstMatch(trimmed);
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if (match != null) {
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debugPrint('[QR_SCAN] regex matched, phone=${match.group(1)}');
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return match.group(1);
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}
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// 方案2：Uri.parse
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final uri = Uri.tryParse(trimmed);
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if (uri != null && uri.scheme == 'durian') {
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final phone = uri.queryParameters['phone'];
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if (phone != null && RegExp(r'^\d{11}$').hasMatch(phone)) {
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debugPrint('[QR_SCAN] Uri.parse matched, phone=$phone');
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return phone;
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}
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}
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// 方案3：最宽松兜底 - 字符串中任何 phone=11位数字
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final fallback = RegExp(r'phone=(\d{11})').firstMatch(trimmed);
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if (fallback != null) {
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debugPrint('[QR_SCAN] fallback matched, phone=${fallback.group(1)}');
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return fallback.group(1);
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}
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debugPrint('[QR_SCAN] all parsing failed for: "$trimmed"');
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return null;
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} catch (e) {
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debugPrint('[QR_SCAN] exception: $e');
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return null;
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}
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}
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