#鸿蒙学习大百科#FA模型下如何获取首选项实例？

import ohos.data.preferences.Preferences;
import ohos.data.preferences.PreferencesHelper;
import ohos.app.Context;

public class MyFeatureAbility extends Ability {

    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        
        // 获取 Preferences 实例，"my_preferences" 是文件名
        Preferences preferences = PreferencesHelper.getPreferences(getContext(), "my_preferences");
        
        // 示例：存储和读取数据
        savePreferences(preferences);
        String value = loadPreferences(preferences);
        System.out.println("Loaded Value: " + value);
    }

    private void savePreferences(Preferences preferences) {
        Preferences.Editor editor = preferences.edit();
        editor.putString("key", "value"); // 存储字符串
        editor.flushSync(); // 同步写入存储
    }

    private String loadPreferences(Preferences preferences) {
        return preferences.getString("key", "default_value");
    }
}

// 获取context
import featureAbility from '@ohos.ability.featureAbility';
import { BusinessError } from '@ohos.base';

let context = featureAbility.getContext();
let options: dataPreferences.Options =  { name: 'myStore' };
let preferences: dataPreferences.Preferences = dataPreferences.getPreferencesSync(context, options);