71 lines
1.9 KiB
Dart
71 lines
1.9 KiB
Dart
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// native_scan 的最小演示壳。
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//
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// 只用来手工验证原生实现接没接上：Kotlin / Swift 侧还没写（见 07），
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// 所以现在点「扫码」必然走到 UNSUPPORTED_PLATFORM 分支——这是预期结果，
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// 也正好演示了 07 §「OHOS 后续演进」要求的**不静默返回假数据**。
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:native_scan/native_scan.dart';
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void main() {
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runApp(const ExampleApp());
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}
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/// 演示用的根 Widget。
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class ExampleApp extends StatefulWidget {
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/// 构造。
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const ExampleApp({super.key});
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@override
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State<ExampleApp> createState() => _ExampleAppState();
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}
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class _ExampleAppState extends State<ExampleApp> {
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final NativeScan _scan = NativeScan();
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String _result = '未扫码';
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Future<void> _startScan() async {
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try {
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final ScanResult result = await _scan.startScan(
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ScanOptions(mode: ScanMode.barcode, title: '扫描商品条码'),
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);
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if (!mounted) return;
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setState(() {
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_result = '${result.value}（${result.durationMs}ms）';
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});
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} on NativeScanException catch (e) {
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if (!mounted) return;
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// 取消不是错误，静默回到原状态即可（07 §使用规则）。
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setState(() {
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_result = e.isCancelled ? '已取消' : '${e.code}: ${e.message}';
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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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home: Scaffold(
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appBar: AppBar(title: const Text('native_scan example')),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text(_result),
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const SizedBox(height: 16),
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FilledButton(
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onPressed: () {
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unawaited(_startScan());
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},
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child: const Text('扫码'),
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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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