Files
monisuo/flutter_monisuo/lib/ui/components/coin_icon.dart
sion dff698e9bb feat: 集成离线数字货币图标系统
 新功能:
- 下载16个主流币种图标(BTC, ETH, USDT, BNB, SOL等)
- 创建 CoinIcon 组件,支持离线图标和兜底显示
- 更新 CoinAvatar 组件,使用新的 CoinIcon
- 更新 market_page.dart 中的 _CoinAvatar 组件

📦 资源:
- 图标存放在 flutter_monisuo/assets/icons/crypto/
- 使用 Cryptocurrency Icons 开源图标库
- PNG 格式,128x128 像素

🎯 特性:
- 支持自定义大小
- 支持圆形背景
- 未找到图标时显示币种代码(兜底方案)
- 支持深色/浅色模式

📝 修改文件:
- 新增:flutter_monisuo/lib/ui/components/coin_icon.dart
- 新增:flutter_monisuo/assets/icons/crypto/*.png (16个)
- 修改:flutter_monisuo/pubspec.yaml
- 修改:flutter_monisuo/lib/ui/pages/trade/components/coin_avatar.dart
- 修改:flutter_monisuo/lib/ui/pages/market/market_page.dart

-  后端构建成功 (2.0s)
-  Flutter Web 构建成功 (24.1s)
- ⚠️ Admin: TypeScript类型错误(已知问题)
2026-04-07 03:39:20 +08:00

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import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
/// 数字货币图标组件
///
/// 支持离线图标和兜底显示
class CoinIcon extends StatelessWidget {
final String symbol; // 币种代码,如 'BTC', 'ETH'
final double size; // 图标大小,默认 40
final bool isCircle; // 是否圆形背景,默认 false
const CoinIcon({
super.key,
required this.symbol,
this.size = 40,
this.isCircle = false,
});
// 币种代码到文件名的映射
static const Map<String, String> _coinFileMap = {
'BTC': 'btc',
'ETH': 'eth',
'USDT': 'usdt',
'BNB': 'bnb',
'SOL': 'sol',
'XRP': 'xrp',
'ADA': 'ada',
'DOGE': 'doge',
'DOT': 'dot',
'MATIC': 'matic',
'SHIB': 'shib',
'LTC': 'ltc',
'AVAX': 'avax',
'LINK': 'link',
'UNI': 'uni',
'ATOM': 'atom',
};
@override
Widget build(BuildContext context) {
final normalizedSymbol = symbol.toUpperCase();
final fileName = _coinFileMap[normalizedSymbol];
Widget icon;
if (fileName != null) {
// 尝试加载本地图标
icon = Image.asset(
'assets/icons/crypto/$fileName.png',
width: size,
height: size,
fit: BoxFit.contain,
errorBuilder: (context, error, stackTrace) {
// 加载失败显示兜底UI
return _buildFallback(context, normalizedSymbol);
},
);
} else {
// 没有对应的图标显示兜底UI
icon = _buildFallback(context, normalizedSymbol);
}
if (isCircle) {
return Container(
width: size,
height: size,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Theme.of(context).colorScheme.surfaceContainerHigh,
),
child: Center(child: icon),
);
}
return icon;
}
/// 构建兜底UI显示币种代码
Widget _buildFallback(BuildContext context, String symbol) {
return Container(
width: size,
height: size,
decoration: BoxDecoration(
shape: BoxShape.circle,
gradient: LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [
Theme.of(context).colorScheme.primary,
Theme.of(context).colorScheme.secondary,
],
),
),
child: Center(
child: Text(
symbol.length > 3 ? symbol.substring(0, 3) : symbol,
style: TextStyle(
color: Colors.white,
fontSize: size * 0.35,
fontWeight: FontWeight.bold,
),
),
),
);
}
}