flutter架 构项目基础
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崔宝新
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:new_learn/core/providers/privacy_provider.dart';
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import 'package:new_learn/core/storage/privacy_storage.dart';
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import 'package:new_learn/features/auth/legal_documents.dart';
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/// ============================================================
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/// 【PrivacyConsentPage】首次启动隐私协议页
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///
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/// 作用：
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/// 1. 用户首次打开 App 时，先展示隐私说明；
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/// 2. 用户点击"同意并继续"后，保存本地状态并放行进入主流程；
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/// 3. 用户点击"暂不同意"时，维持拦截状态（Android 可直接退出应用）。
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///
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/// 这里是"应用启动级"协议页，不等同于登录页里的协议勾选：
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/// - 启动协议：未登录前就要先拦；
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/// - 登录页协议：属于业务表单校验，发生在点击登录时。
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/// ============================================================
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class PrivacyConsentPage extends StatefulWidget {
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const PrivacyConsentPage({super.key});
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@override
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State<PrivacyConsentPage> createState() => _PrivacyConsentPageState();
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}
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class _PrivacyConsentPageState extends State<PrivacyConsentPage> {
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bool _submitting = false;
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_LegalDocumentData? _activeDocument;
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Future<void> _openLegalDocument({
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required String title,
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required String content,
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}) async {
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if (!mounted) return;
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setState(() {
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_activeDocument = _LegalDocumentData(
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title: title,
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content: content,
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);
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});
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}
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Future<void> _accept() async {
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if (_submitting) return;
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setState(() => _submitting = true);
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await PrivacyStorage.instance.saveAccepted(true);
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// 更新全局门禁状态：启动 Gate 和 go_router 守卫都会同步放行。
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privacyAcceptedNotifier.value = true;
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if (mounted) {
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setState(() => _submitting = false);
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}
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}
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Future<void> _decline() async {
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final result = await showDialog<bool>(
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context: context,
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builder: (dialogContext) => AlertDialog(
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title: const Text('提示'),
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content: const Text('若您不同意隐私政策，将无法使用我们的服务'),
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actions: [
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TextButton(
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onPressed: () => Navigator.of(dialogContext).pop(true),
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child: const Text('重新考虑'),
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),
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FilledButton(
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onPressed: () => Navigator.of(dialogContext).pop(false),
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child: const Text('退出'),
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),
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],
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),
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);
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// 选"重新考虑"或直接关闭弹窗，都继续停留在当前隐私页。
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if (result != false) return;
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await PrivacyStorage.instance.saveAccepted(false);
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privacyAcceptedNotifier.value = false;
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// Android 上按常见做法直接退出应用；其他平台调用也安全，无法退出时只是不生效。
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await SystemNavigator.pop();
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}
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final activeDocument = _activeDocument;
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if (activeDocument != null) {
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return PopScope(
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canPop: false,
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onPopInvokedWithResult: (didPop, result) {
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if (didPop) return;
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setState(() => _activeDocument = null);
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},
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child: Scaffold(
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backgroundColor: const Color(0xFFF5F7FA),
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appBar: AppBar(
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title: Text(activeDocument.title),
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leading: IconButton(
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onPressed: () => setState(() => _activeDocument = null),
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icon: const Icon(Icons.arrow_back),
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),
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),
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body: SafeArea(
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child: SingleChildScrollView(
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padding: const EdgeInsets.fromLTRB(16, 16, 16, 24),
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child: Container(
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width: double.infinity,
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(16),
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),
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child: SelectableText(
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activeDocument.content,
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style: const TextStyle(
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fontSize: 14,
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height: 1.8,
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color: Color(0xFF323233),
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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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return Scaffold(
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backgroundColor: Colors.white,
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body: SafeArea(
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child: Padding(
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padding: const EdgeInsets.fromLTRB(24, 24, 24, 20),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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'欢迎使用爱学蝶变',
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style: theme.textTheme.headlineSmall?.copyWith(
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fontWeight: FontWeight.w700,
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),
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),
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const SizedBox(height: 16),
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Text(
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'为保障你的个人信息安全，在继续使用前，请先阅读并同意《用户协议》和《隐私政策》。同意后我们才会继续进入 App 的登录和业务流程。',
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style: theme.textTheme.bodyLarge?.copyWith(
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color: const Color(0xFF4B5563),
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height: 1.7,
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),
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),
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const SizedBox(height: 20),
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Expanded(
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child: Container(
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width: double.infinity,
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: const Color(0xFFF8FAFC),
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borderRadius: BorderRadius.circular(16),
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),
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child: SingleChildScrollView(
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child: Text(
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'1. 我们会在必要范围内使用账号信息、设备信息，用于登录鉴权、学习记录同步、功能服务提供。\n\n'
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'2. 未经你的明确同意，我们不会将你的个人信息用于与学习无关的用途。\n\n'
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'3. 你可以通过《用户协议》和《隐私政策》了解信息收集、使用、存储与保护方式。\n\n'
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'4. 若你不同意本协议内容，将无法继续进入 App 主流程。',
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style: theme.textTheme.bodyMedium?.copyWith(
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color: const Color(0xFF475569),
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height: 1.8,
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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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Wrap(
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spacing: 4,
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runSpacing: 4,
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children: [
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Text(
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'点击“同意并继续”即表示你已阅读并同意',
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style: theme.textTheme.bodySmall?.copyWith(
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color: const Color(0xFF64748B),
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),
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),
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InkWell(
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onTap: () => _openLegalDocument(
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title: kUserAgreementTitle,
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content: kUserAgreementContent,
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),
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child: const Text(
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'《用户协议》',
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style: TextStyle(
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color: Color(0xFF2563EB),
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fontSize: 12,
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),
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),
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),
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Text(
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'和',
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style: theme.textTheme.bodySmall?.copyWith(
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color: const Color(0xFF64748B),
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),
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),
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InkWell(
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onTap: () => _openLegalDocument(
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title: kPrivacyPolicyTitle,
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content: kPrivacyPolicyContent,
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),
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child: const Text(
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'《隐私政策》',
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style: TextStyle(
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color: Color(0xFF2563EB),
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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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const SizedBox(height: 20),
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Row(
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children: [
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Expanded(
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child: OutlinedButton(
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onPressed: _submitting ? null : _decline,
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style: OutlinedButton.styleFrom(
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minimumSize: const Size.fromHeight(48),
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),
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child: const Text('暂不同意'),
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),
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),
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const SizedBox(width: 12),
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Expanded(
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child: FilledButton(
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onPressed: _submitting ? null : _accept,
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style: FilledButton.styleFrom(
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minimumSize: const Size.fromHeight(48),
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),
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child: _submitting
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? const SizedBox(
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width: 18,
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height: 18,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: Colors.white,
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),
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)
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: const Text('同意并继续'),
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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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class _LegalDocumentData {
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const _LegalDocumentData({
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required this.title,
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required this.content,
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});
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final String title;
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final String content;
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}
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