sion
491fcfdb5d
- 下载16个主流币种SVG图标(BTC/ETH/USDT/BNB/SOL/XRP/ADA/DOGE/DOT/MATIC/SHIB/LTC/AVAX/LINK/UNI/ATOM) - 图标来源: spothq/cryptocurrency-icons (开源) - 更新CoinIcon组件使用flutter_svg加载SVG格式 - 添加flutter_svg依赖 - 构建验证通过
102 lines
2.4 KiB
Dart
102 lines
2.4 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_svg/flutter_svg.dart';
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/// 数字货币图标组件
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///
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/// 支持离线 SVG 图标和兜底显示
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class CoinIcon extends StatelessWidget {
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final String symbol; // 币种代码，如 'BTC', 'ETH'
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final double size; // 图标大小，默认 40
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final bool isCircle; // 是否圆形背景，默认 false
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const CoinIcon({
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super.key,
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required this.symbol,
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this.size = 40,
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this.isCircle = false,
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});
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// 币种代码到文件名的映射
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static const Map<String, String> _coinFileMap = {
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'BTC': 'btc',
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'ETH': 'eth',
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'USDT': 'usdt',
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'BNB': 'bnb',
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'SOL': 'sol',
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'XRP': 'xrp',
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'ADA': 'ada',
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'DOGE': 'doge',
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'DOT': 'dot',
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'MATIC': 'matic',
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'SHIB': 'shib',
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'LTC': 'ltc',
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'AVAX': 'avax',
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'LINK': 'link',
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'UNI': 'uni',
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'ATOM': 'atom',
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};
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@override
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Widget build(BuildContext context) {
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final normalizedSymbol = symbol.toUpperCase();
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final fileName = _coinFileMap[normalizedSymbol];
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Widget icon;
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if (fileName != null) {
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icon = SvgPicture.asset(
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'assets/icons/crypto/$fileName.svg',
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width: size,
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height: size,
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fit: BoxFit.contain,
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placeholderBuilder: (context) => _buildFallback(context, normalizedSymbol),
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);
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} else {
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icon = _buildFallback(context, normalizedSymbol);
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}
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if (isCircle) {
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return Container(
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width: size,
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height: size,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: Theme.of(context).colorScheme.surfaceContainerHigh,
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),
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child: Center(child: icon),
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);
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}
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return icon;
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}
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/// 构建兜底UI（显示币种代码）
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Widget _buildFallback(BuildContext context, String symbol) {
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return Container(
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width: size,
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height: size,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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gradient: LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: [
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Theme.of(context).colorScheme.primary,
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Theme.of(context).colorScheme.secondary,
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],
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),
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),
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child: Center(
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child: Text(
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symbol.length > 3 ? symbol.substring(0, 3) : symbol,
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style: TextStyle(
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color: Colors.white,
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fontSize: size * 0.35,
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fontWeight: FontWeight.bold,
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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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