feat:增加公共组件

lib/provider/theme_provider.dart

@@ -0,0 +1,77 @@
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../utils/theme_utils.dart';
+
+class ThemeProvider with ChangeNotifier {
+  static const String _themeKey = 'selected_theme';
+  static const String _darkModeKey = 'is_dark_mode';
+
+  bool isDarkMode = false;
+  ThemeColor currentTheme = defaultThemes[0];
+
+  late SharedPreferences _prefs;
+  bool isInitialized = false;
+
+  ThemeProvider() {
+    _initPreferences();
+  }
+
+  // 初始化 SharedPreferences
+  Future<void> _initPreferences() async {
+    _prefs = await SharedPreferences.getInstance();
+    _loadPreferences();
+
+    isInitialized = true;
+    notifyListeners();
+  }
+
+  // 加载存储的设置
+  void _loadPreferences() {
+    isDarkMode = _prefs.getBool(_darkModeKey) ?? false;
+
+    // 加载主题色
+    final themeName = _prefs.getString(_themeKey);
+    if (themeName != null) {
+      currentTheme = getThemeColor(themeName);
+    }
+  }
+
+  // 保存主题色
+  Future<void> _saveTheme() async {
+    await _prefs.setString(_themeKey, currentTheme.name);
+  }
+
+  // 保存暗黑模式
+  Future<void> _saveDarkMode() async {
+    await _prefs.setBool(_darkModeKey, isDarkMode);
+  }
+
+  List<ThemeColor> get availableThemes => defaultThemes;
+
+  // 切换明暗模式
+  void toggleDarkMode(bool value) {
+    isDarkMode = value;
+    _saveDarkMode();
+    notifyListeners();
+  }
+
+  // 更改主题色
+  void changeTheme(ThemeColor theme) {
+    currentTheme = theme;
+    _saveTheme();
+    notifyListeners();
+  }
+
+  ThemeData get currentThemeData {
+    return ThemeData(
+      primarySwatch: currentTheme.materialColor,
+      colorScheme: ColorScheme.fromSeed(
+        seedColor: currentTheme.primaryColor,
+        brightness: isDarkMode ? Brightness.dark : Brightness.light,
+      ),
+      useMaterial3: true,
+      fontFamily: 'CustomFont',
+    );
+  }
+}