主题 Flutter插件,用于持久和动态更改主题。 在线演示: : import 'package:flutter/material.dart' ; import 'package:persist_theme/persist_theme.dart' ; import 'package:provider/provider.dart' ; import 'package:scoped_model/scoped_model.dart' ; import 'dart:io' show Platform; import 'package:flutter/foundation.dart' ; //