首先在 pubspec.yaml 檔案中添加 shared_preferences 參考并 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{
// 保存資料
Future setUserInfo(key, value) async{
SharedPreferences sp = await SharedPreferences.getInstance();
sp.setString(key, value);
}
// 獲取資料
Future getUserInfo(key) async{
SharedPreferences sp = await SharedPreferences.getInstance();
print(sp.get(key));
return sp.get(key);
}
// 清除資料
Future deleteUserInfo(key) async{
SharedPreferences sp = await SharedPreferences.getInstance();
sp.remove(key);
}
}
呼叫方式
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 Flutter
I/flutter (13801): Save Save Save
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