theme_page.dart
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import 'package:flustars/flustars.dart';
import 'package:flutter/material.dart';
import 'package:one_poem/provider/theme_provider.dart';
import 'package:one_poem/res/constant.dart';
import 'package:one_poem/widgets/my_app_bar.dart';
import 'package:provider/provider.dart';
class ThemePage extends StatefulWidget {
const ThemePage({Key? key}) : super(key: key);
@override
_ThemePageState createState() => _ThemePageState();
}
class _ThemePageState extends State<ThemePage> {
final List<String> _list = <String>['跟随系统', '开启', '关闭'];
@override
Widget build(BuildContext context) {
final String? theme = SpUtil.getString(Constant.theme);
String themeMode;
switch(theme) {
case 'Dark':
themeMode = _list[1];
break;
case 'Light':
themeMode = _list[2];
break;
default:
themeMode = _list[0];
break;
}
return Scaffold(
appBar: const MyAppBar(
title: '夜间模式',
),
body: ListView.separated(
itemCount: _list.length,
separatorBuilder: (_, __) => const Divider(),
itemBuilder: (_, int index) {
return InkWell(
onTap: () {
final ThemeMode themeMode = index == 0 ? ThemeMode.system : (index == 1 ? ThemeMode.dark : ThemeMode.light);
// Provider.of<ThemeProvider>(context, listen: false).setTheme(themeMode);
/// 与上方等价，provider 4.1.0添加的拓展方法
context.read<ThemeProvider>().setTheme(themeMode);
setState(() {});
},
child: Container(
alignment: Alignment.centerLeft,
padding: const EdgeInsets.symmetric(horizontal: 16.0),
height: 50.0,
child: Row(
children: <Widget>[
Expanded(
child: Text(_list[index]),
),
Opacity(
opacity: themeMode == _list[index] ? 1 : 0,
child: const Icon(Icons.done, color: Colors.blue),
)
],
),
),
);
},
),
);
}
}