#鸿蒙通关秘籍#如何创建和初始化DataAbility组件？

创建和初始化DataAbility组件需要在代码中包含相关的导入和设置。例如，以下是鸿蒙系统中如何实现DataAbility的步骤：

javascript import featureAbility from '@ohos.ability.featureAbility'; import dataAbility from '@ohos.data.dataAbility'; import rdb from '@ohos.data.rdb'; import hilog from '@ohos.hilog';

let TABLE_NAME = 'book'; let STORE_CONFIG: rdb.StoreConfig = { name: 'book.db' }; let SQL_CREATE_TABLE = 'CREATE TABLE IF NOT EXISTS book(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, introduction TEXT NOT NULL)'; let rdbStore: rdb.RdbStore | undefined = undefined; const TAG: string = '[Sample_FAModelAbilityDevelop]'; const domain: number = 0xFF00;

class DataAbility { onInitialized(want) { hilog.info(domain, TAG, 'DataAbility onInitialized, abilityInfo:' + want.bundleName); let context = { stageMode: featureAbility.getContext().stageMode }; rdb.getRdbStore(context, STORE_CONFIG, 1, (err, store) => { hilog.info(domain, TAG, 'DataAbility getRdbStore callback'); store.executeSql(SQL_CREATE_TABLE, []); rdbStore = store; }); } }

这段代码展示了如何初始化一个名为DataAbility的类，其中包括创建RDB（关系型数据库）表的逻辑，以及如何在onInitialized方法中获取和设定数据存储。