优化
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323
client/flutter/lib/theme/app_theme.dart
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323
client/flutter/lib/theme/app_theme.dart
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import 'package:flutter/material.dart';
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/// Twitter 风格现代主题 —— 简洁、专业、值得信赖
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///
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/// 设计原则：
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/// - 主色：Twitter Blue #1DA1F2
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/// - 背景：纯净白 + 浅灰蓝
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/// - 无阴影，细线边框分隔
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/// - 文字：清晰的三级灰度
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class AppTheme {
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// 主色系 —— Twitter Blue
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static const Color primaryColor = Color(0xFF1DA1F2);
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static const Color primaryColorDark = Color(0xFF1A91DA);
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static const Color primaryColorLight = Color(0xFFE8F5FE);
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// 背景
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static const Color scaffoldBackground = Color(0xFFF5F8FA);
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static const Color scaffoldBackgroundDark = Color(0xFF000000);
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// 语义色
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static const Color accentColor = Color(0xFF1DA1F2);
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static const Color errorColor = Color(0xFFE0245E);
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static const Color successColor = Color(0xFF17BF63);
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static const Color warningColor = Color(0xFFFFAD1F);
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static const Color infoColor = Color(0xFF1DA1F2);
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// 文字层级
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static const Color textPrimary = Color(0xFF14171A);
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static const Color textSecondary = Color(0xFF657786);
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static const Color textHint = Color(0xFFAAB8C2);
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static const Color textDisabled = Color(0xFFCCD6DD);
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// 分隔线 / 边框
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static const Color dividerColor = Color(0xFFE1E8ED);
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// 卡片/面板
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static const Color cardBackground = Colors.white;
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static const Color cardBackgroundDark = Color(0xFF16202A);
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// 聊天气泡
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static const Color bubbleSelf = Color(0xFF1DA1F2); // 蓝色气泡（己方）
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static const Color bubbleOther = Color(0xFFEFF3F6); // 浅灰气泡（对方）
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static const Color chatInputBg = Color(0xFFF5F8FA);
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// 辅助色
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static const Color dragHandleColor = Color(0xFFCCD6DD);
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static const Color timestampBg = Color(0xFFE8ECF0);
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static const Color timestampText = Color(0xFF657786);
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// ============================================================
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// 浅色主题（默认）
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// ============================================================
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static ThemeData get lightTheme {
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return ThemeData(
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useMaterial3: true,
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brightness: Brightness.light,
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colorScheme: ColorScheme.light(
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primary: primaryColor,
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onPrimary: Colors.white,
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secondary: primaryColor,
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onSecondary: Colors.white,
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surface: Colors.white,
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onSurface: textPrimary,
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error: errorColor,
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onError: Colors.white,
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outline: dividerColor,
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outlineVariant: Color(0xFFE1E8ED),
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),
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scaffoldBackgroundColor: scaffoldBackground,
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// AppBar —— 白底，底部分隔线
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appBarTheme: const AppBarTheme(
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backgroundColor: Colors.white,
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foregroundColor: textPrimary,
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elevation: 0,
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centerTitle: false,
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titleTextStyle: TextStyle(
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color: textPrimary,
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fontSize: 20,
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fontWeight: FontWeight.w800,
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),
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surfaceTintColor: Colors.transparent,
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shadowColor: Colors.transparent,
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),
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// 卡片 —— 白底、细边框、无阴影
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cardTheme: CardThemeData(
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color: cardBackground,
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elevation: 0,
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margin: EdgeInsets.zero,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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side: const BorderSide(color: dividerColor, width: 0.5),
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),
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),
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// 按钮
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elevatedButtonTheme: ElevatedButtonThemeData(
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style: ElevatedButton.styleFrom(
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backgroundColor: primaryColor,
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foregroundColor: Colors.white,
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disabledBackgroundColor: const Color(0xFFAADAF5),
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disabledForegroundColor: Colors.white70,
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padding: const EdgeInsets.symmetric(horizontal: 32, vertical: 14),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(24),
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),
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textStyle: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.w700,
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),
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elevation: 0,
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),
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),
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outlinedButtonTheme: OutlinedButtonThemeData(
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style: OutlinedButton.styleFrom(
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foregroundColor: primaryColor,
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side: const BorderSide(color: primaryColor, width: 1.5),
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padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(24),
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),
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),
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),
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textButtonTheme: TextButtonThemeData(
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style: TextButton.styleFrom(
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foregroundColor: primaryColor,
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textStyle: const TextStyle(fontSize: 15, fontWeight: FontWeight.w600),
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),
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),
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// 输入框
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inputDecorationTheme: InputDecorationTheme(
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filled: true,
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fillColor: const Color(0xFFF5F8FA),
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: dividerColor, width: 1),
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),
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enabledBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: dividerColor, width: 1),
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),
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focusedBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: primaryColor, width: 2),
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),
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errorBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: errorColor, width: 1),
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),
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contentPadding:
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const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
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hintStyle: const TextStyle(color: textHint, fontSize: 15),
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labelStyle: const TextStyle(color: textSecondary, fontSize: 14),
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),
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// 底部导航
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bottomNavigationBarTheme: const BottomNavigationBarThemeData(
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backgroundColor: Colors.white,
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selectedItemColor: primaryColor,
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unselectedItemColor: textHint,
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type: BottomNavigationBarType.fixed,
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elevation: 0,
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selectedLabelStyle: TextStyle(fontSize: 11, fontWeight: FontWeight.w600),
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unselectedLabelStyle: TextStyle(fontSize: 11),
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),
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// 分隔线
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dividerTheme: const DividerThemeData(
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color: dividerColor,
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thickness: 0.5,
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space: 0.5,
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),
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// 对话框
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dialogTheme: DialogThemeData(
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(16),
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),
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titleTextStyle: const TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.w800,
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color: textPrimary,
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),
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),
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// SnackBar
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snackBarTheme: SnackBarThemeData(
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behavior: SnackBarBehavior.floating,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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),
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// FAB
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floatingActionButtonTheme: const FloatingActionButtonThemeData(
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backgroundColor: primaryColor,
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foregroundColor: Colors.white,
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elevation: 2,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.all(Radius.circular(16)),
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),
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),
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// TabBar
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tabBarTheme: TabBarThemeData(
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labelColor: primaryColor,
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unselectedLabelColor: textSecondary,
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indicatorColor: primaryColor,
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indicatorSize: TabBarIndicatorSize.label,
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labelStyle: const TextStyle(fontSize: 15, fontWeight: FontWeight.w700),
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unselectedLabelStyle: const TextStyle(fontSize: 15),
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),
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// Chip
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chipTheme: ChipThemeData(
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backgroundColor: const Color(0xFFF5F8FA),
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selectedColor: primaryColorLight,
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labelStyle: const TextStyle(fontSize: 13, color: textPrimary),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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side: BorderSide.none,
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),
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// List Tile
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listTileTheme: const ListTileThemeData(
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contentPadding: EdgeInsets.symmetric(horizontal: 16),
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minVerticalPadding: 12,
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),
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// 页面过渡
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pageTransitionsTheme: const PageTransitionsTheme(
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builders: {
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TargetPlatform.android: CupertinoPageTransitionsBuilder(),
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TargetPlatform.iOS: CupertinoPageTransitionsBuilder(),
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},
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),
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);
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}
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// ============================================================
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// 深色主题
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// ============================================================
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static ThemeData get darkTheme {
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const darkSurface = Color(0xFF192734);
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const darkBg = Color(0xFF000000);
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return ThemeData(
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useMaterial3: true,
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brightness: Brightness.dark,
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colorScheme: ColorScheme.dark(
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primary: primaryColor,
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onPrimary: Colors.white,
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secondary: primaryColor,
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surface: darkSurface,
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onSurface: Colors.white,
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error: errorColor,
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),
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scaffoldBackgroundColor: darkBg,
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appBarTheme: const AppBarTheme(
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backgroundColor: darkSurface,
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foregroundColor: Colors.white,
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elevation: 0,
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centerTitle: false,
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titleTextStyle: TextStyle(
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color: Colors.white,
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fontSize: 20,
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fontWeight: FontWeight.w800,
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),
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surfaceTintColor: Colors.transparent,
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),
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cardTheme: CardThemeData(
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color: darkSurface,
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elevation: 0,
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margin: EdgeInsets.zero,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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side: const BorderSide(color: Color(0xFF38444D), width: 0.5),
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),
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),
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elevatedButtonTheme: ElevatedButtonThemeData(
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style: ElevatedButton.styleFrom(
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backgroundColor: primaryColor,
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(horizontal: 32, vertical: 14),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(24),
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),
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elevation: 0,
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),
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),
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inputDecorationTheme: InputDecorationTheme(
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filled: true,
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fillColor: const Color(0xFF192734),
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: Color(0xFF38444D), width: 1),
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),
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enabledBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: Color(0xFF38444D), width: 1),
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),
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focusedBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: primaryColor, width: 2),
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),
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contentPadding:
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const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
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),
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bottomNavigationBarTheme: const BottomNavigationBarThemeData(
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backgroundColor: darkSurface,
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selectedItemColor: primaryColor,
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unselectedItemColor: Color(0xFF657786),
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type: BottomNavigationBarType.fixed,
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elevation: 0,
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),
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dividerTheme: const DividerThemeData(
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color: Color(0xFF38444D),
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thickness: 0.5,
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),
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dialogTheme: DialogThemeData(
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backgroundColor: darkSurface,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(16),
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),
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),
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tabBarTheme: const TabBarThemeData(
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labelColor: primaryColor,
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unselectedLabelColor: Color(0xFF657786),
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indicatorColor: primaryColor,
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),
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);
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}
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}
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