flutter_app_android/lib/presentation/screens/news/news_screen.dart

import 'package:flutter/material.dart';
import '../../navigation/bottom_nav_bar.dart';

class NewsScreen extends StatelessWidget {
  const NewsScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('资讯'),
        actions: [
          IconButton(
            icon: const Icon(Icons.search),
            onPressed: () {},
          ),
        ],
      ),
      body: ListView.builder(
        padding: const EdgeInsets.all(16),
        itemCount: 10,
        itemBuilder: (context, index) {
          return _buildNewsCard(index);
        },
      ),
      bottomNavigationBar: const BottomNavBar(initialIndex: 1),
    );
  }
  
  Widget _buildNewsCard(int index) {
    final titles = [
      'Flutter 3.0 新特性详解',
      'Dart 语言最新更新',
      '移动开发趋势分析',
      '前端框架对比',
      '用户体验设计原则',
      '后端架构最佳实践',
      '数据库性能优化',
      '云原生技术解析',
      '人工智能在移动端的应用',
      '跨平台开发方案比较',
    ];
    
    final subtitles = [
      '深入了解Flutter最新版本的重要更新和改进',
      'Dart语言的最新特性和优化方向',
      '2024年移动开发的重要趋势和技术方向',
      '主流前端框架的优缺点对比分析',
      '提升应用用户体验的关键设计原则',
      '构建高性能后端服务的最佳实践',
      '数据库查询优化和性能调优技巧',
      '云原生技术在微服务中的应用',
      'AI技术在移动应用中的创新应用',
      '各种跨平台开发方案的对比和选择',
    ];
    
    final times = [
      '2小时前',
      '5小时前',
      '昨天',
      '2天前',
      '3天前',
      '1周前',
      '1周前',
      '2周前',
      '2周前',
      '1个月前',
    ];
    
    return Card(
      margin: const EdgeInsets.only(bottom: 16),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(12),
      ),
      child: InkWell(
        onTap: () {},
        borderRadius: BorderRadius.circular(12),
        child: Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Container(
                    width: 60,
                    height: 60,
                    decoration: BoxDecoration(
                      color: Colors.primaries[index % Colors.primaries.length],
                      borderRadius: BorderRadius.circular(8),
                    ),
                    child: Center(
                      child: Text(
                        '新闻',
                        style: TextStyle(
                          color: Colors.white,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ),
                  ),
                  const SizedBox(width: 16),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          titles[index],
                          style: const TextStyle(
                            fontSize: 16,
                            fontWeight: FontWeight.bold,
                          ),
                          maxLines: 2,
                          overflow: TextOverflow.ellipsis,
                        ),
                        const SizedBox(height: 4),
                        Text(
                          subtitles[index],
                          style: TextStyle(
                            fontSize: 14,
                            color: Colors.grey[600],
                          ),
                          maxLines: 2,
                          overflow: TextOverflow.ellipsis,
                        ),
                      ],
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 12),
              Row(
                children: [
                  Icon(
                    Icons.schedule,
                    size: 14,
                    color: Colors.grey[500],
                  ),
                  const SizedBox(width: 4),
                  Text(
                    times[index],
                    style: TextStyle(
                      fontSize: 12,
                      color: Colors.grey[500],
                    ),
                  ),
                  const Spacer(),
                  IconButton(
                    icon: Icon(
                      Icons.bookmark_border,
                      color: Colors.grey[500],
                    ),
                    onPressed: () {},
                    iconSize: 20,
                  ),
                  IconButton(
                    icon: Icon(
                      Icons.share,
                      color: Colors.grey[500],
                    ),
                    onPressed: () {},
                    iconSize: 20,
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}