首先在 pubspec.yaml 文件中添加 shared_preferences 引用并 Packages get

dependencies:flutter:sdk: flutter# The following adds the Cupertino Icons font to your application.# Use with the CupertinoIcons class for iOS style icons.shared_preferences:

然后封裝 SharedPreferences 工具類

import 'package:shared_preferences/shared_preferences.dart';/*** @des SharedPreferences 工具類* @author liyongli 20190522* */ class SharedPreferencesDataUtils{// 保存數據Future setUserInfo(key, value) async{SharedPreferences sp = await SharedPreferences.getInstance();sp.setString(key, value);}// 獲取數據Future getUserInfo(key) async{SharedPreferences sp = await SharedPreferences.getInstance();print(sp.get(key));return sp.get(key);}// 清除數據Future deleteUserInfo(key) async{SharedPreferences sp = await SharedPreferences.getInstance();sp.remove(key);}}

調用方式

SharedPreferencesDataUtils spDataUtils = new SharedPreferencesDataUtils();spDataUtils.setUserInfo("name","Flutter Flutter Flutter");spDataUtils.setUserInfo("type","Save Save Save");print(dataUtils.getUserInfo("name"));print(dataUtils.getUserInfo("type"));

運行結果

I/flutter (13801): Flutter Flutter FlutterI/flutter (13801): Save Save Save

總結

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