/// Description: Theme: dark or light /// Time : 04/28/2023 Friday /// Author : liuyuqi.gov@msn.cn import 'package:flutter/material.dart'; class AppTheme extends ThemeExtension { AppTheme(); AppTheme.dark(); static ThemeData createTheme({ bool isDark = false, bool isHighContrast = false, }) { return ThemeData.from( colorScheme: ColorScheme.fromSeed( seedColor: Colors.blue, brightness: isDark ? Brightness.dark : Brightness.light, ), textTheme: const TextTheme(), ).copyWith( extensions: [ isDark ? AppTheme.dark() : AppTheme(), ], ); } @override ThemeExtension copyWith() { return AppTheme(); } @override ThemeExtension lerp(ThemeExtension? other, double t) { return AppTheme(); } }