136 lines
3.7 KiB
Dart
136 lines
3.7 KiB
Dart
import 'package:autosos_flutter/util/toast.dart';
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import 'package:flutter/material.dart';
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import 'package:go_router/go_router.dart';
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import 'package:mobile_scanner/mobile_scanner.dart';
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import 'package:permission_handler/permission_handler.dart';
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/// 扫码页（对应 Android ScanActivity + zxing）
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class QrScanPage extends StatefulWidget {
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const QrScanPage({super.key});
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@override
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State<QrScanPage> createState() => _QrScanPageState();
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}
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class _QrScanPageState extends State<QrScanPage> {
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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 _handled = false;
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@override
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void initState() {
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super.initState();
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_checkPermission();
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}
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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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Future<void> _checkPermission() async {
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final cam = await Permission.camera.request();
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if (!cam.isGranted) {
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if (mounted) {
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Toast.error('未授予相机权限');
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context.pop();
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}
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}
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}
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void _onDetect(BarcodeCapture capture) {
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if (_handled) return;
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for (final b in capture.barcodes) {
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final v = b.rawValue;
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if (v == null || v.isEmpty) continue;
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_handled = true;
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_controller.stop();
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context.pop(v);
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return;
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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 Scaffold(
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backgroundColor: Colors.black,
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appBar: AppBar(
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backgroundColor: Colors.black,
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title: const Text('扫一扫'),
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iconTheme: const IconThemeData(color: Colors.white),
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actions: [
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IconButton(
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icon: const Icon(Icons.flash_on),
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onPressed: () => _controller.toggleTorch(),
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),
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IconButton(
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icon: const Icon(Icons.cameraswitch),
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onPressed: () => _controller.switchCamera(),
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),
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],
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),
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body: Stack(
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children: [
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MobileScanner(
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controller: _controller,
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onDetect: _onDetect,
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errorBuilder: (ctx, err, child) {
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return Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Icon(
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Icons.error_outline,
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color: Colors.white,
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size: 48,
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),
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const SizedBox(height: 8),
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Text(
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'相机错误：${err.errorCode.name}',
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style: const TextStyle(color: Colors.white),
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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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// 扫描框
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Center(
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child: Container(
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width: 240,
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height: 240,
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decoration: BoxDecoration(
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border: Border.all(color: Colors.red, width: 2),
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borderRadius: BorderRadius.circular(12),
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),
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),
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),
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// 顶部提示
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Positioned(
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top: 16,
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left: 0,
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right: 0,
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child: Center(
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child: Container(
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padding:
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const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
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decoration: BoxDecoration(
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color: Colors.black54,
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borderRadius: BorderRadius.circular(20),
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),
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child: const Text(
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'将二维码/条码放入框内，自动扫描',
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style: TextStyle(color: Colors.white, fontSize: 12),
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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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