78 lines
1.8 KiB
Dart
78 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class LanguageSelector extends StatefulWidget {
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const LanguageSelector();
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@override
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_LanguageSelectorState createState() => new _LanguageSelectorState();
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}
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class _LanguageSelectorState extends State<LanguageSelector> {
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late final SharedPreferences prefs;
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late List<bool> isSelected;
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@override
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void initState() {
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super.initState();
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isSelected = [false, false, false];
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SharedPreferences.getInstance()
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.then((prefs) {
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this.prefs = prefs;
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setState(() {
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isSelected = _getSelectedStatus() ?? isSelected;
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});
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});
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}
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void _updateSelectedStatus() async {
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await prefs.setStringList('languageSelectorStatus',
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isSelected
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.map((b) => b ? '1' : '0')
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.toList());
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}
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List<bool>? _getSelectedStatus() {
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return prefs
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.getStringList('languageSelectorStatus')
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?.map((s) => s == '1')
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.toList();
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}
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@override
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Widget build(BuildContext context) {
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return ToggleButtons(
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isSelected: isSelected,
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children: <Widget> [
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_LanguageOption("Auto"),
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_LanguageOption("日本語"),
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_LanguageOption("English")
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],
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selectedColor: Colors.blue,
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onPressed: (int buttonIndex) {
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setState(() {
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for (var i in Iterable.generate(isSelected.length)) {
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isSelected[i] = i == buttonIndex;
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}
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_updateSelectedStatus();
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});
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},
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);
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}
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}
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class _LanguageOption extends StatelessWidget {
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final String language;
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const _LanguageOption(this.language);
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@override
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Widget build(BuildContext context) {
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return Container(
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padding: EdgeInsets.symmetric(vertical: 10.0, horizontal: 20.0),
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child: Center(child: Text(language)),
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);
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}
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} |