Flutter基礎-040-SharedPreferences

sharedPreferences外掛的官網地址：pub.flutter-io.cn/packages/sh…

引入： pubspec.yaml

dependencies:
  ...
  shared_preferences: ^0.5.3+4
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檔案封裝：

import 'package:shared_preferences/shared_preferences.dart';

class SharedPreferenceUtil {
  static Future<bool> setBool(String key, bool value) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return await prefs.setBool(key, value);
  }

  static Future<bool> getBool(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.getBool(key);
  }

  static Future<bool> setString(String key, String value) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return await prefs.setString(key, value);
  }

  static Future<String> getString(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.getString(key);
  }

  static Future<bool> setDouble(String key, double value) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return await prefs.setDouble(key, value);
  }

  static Future<double> getDouble(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.getDouble(key);
  }

  static Future<bool> setInt(String key, int value) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return await prefs.setInt(key, value);
  }

  static Future<int> getInt(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.getInt(key);
  }

  static Future<bool> setStringList(String key, List<String> value) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return await prefs.setStringList(key, value);
  }

  static Future<List<String>> getStringList(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.getStringList(key);
  }

  static Future<bool> containsKey(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.containsKey(key);
  }

  static Future<bool> remove(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.remove(key);
  }

  static Future<bool> clear(String key) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    return prefs.clear();
  }
}
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測試：

void testBool(){
    Future<bool> result = SharedPreferenceUtil.setBool("key", false);
    result.then((value){
      print("is setBool success=$value");
    });

    Future<bool> result2 = SharedPreferenceUtil.getBool("key");
    result2.then((value){
      print("getBoolResult=$value");
    });
  }
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