HarmonyOS-Service服务开发(一)_harmony os service

创建新项目

ServiceAbility开发指导

在config.json中也有配置出现

启动Service

ets获取service的bundleName

项目的bundleName

service的bundleName

这里serviceAbility的bundleName是也是项目的bundleName
这里的abilityName是项目的bundleName+serviceAbility的Name组合而成

示例
比如我上图的示例是com.example.myapplication和com.example.myapplication.ServiceAbility1
那可以这么来启动serviceAbility

onPageShow(){ //Page中的项目初始化(我们这里初始化就开始调用service)
    console.info("Index页面显示了")
    let promise = featureAbility.startAbility(
    {
      want:
      {
        bundleName: "com.example.myapplication",
        abilityName: "com.example.myapplication.ServiceAbility1",
      },
    });
}

//serviceAbility会先执行onStart生命周期
//service.ts(我是这样写serviceAbility的)
//export default {
//    onStart() {
        // hilog.info(0x0000, 'testTag', '%{public}s', 'ServiceAbility onStart');
//        console.info("serive1 start")
//	},
//  ....
//}
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DataAbility开发指导

开发Data步骤

创建Data

1. 需要实现Data中Insert、Query、Update、Delete接口的业务内容。保证能够满足数据库存储业务的基本需求。BatchInsert与ExecuteBatch接口已经在系统中实现遍历逻辑，依赖Insert、Query、Update、Delete接口逻辑，来实现数据的批量处理。

//data.ts(鸿蒙文档中的配置)
import hilog from '@ohos.hilog';
import featureAbility from '@ohos.ability.featureAbility';
import dataAbility from '@ohos.data.dataAbility';
import dataRdb  from '@ohos.data.rdb';

const TABLE_NAME = "book";//表名
const STORE_CONFIG = {name:'book.db'}
const SQL_CREATE_TABLE = 'CREATE TABLE IF NOT EXISTS book(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, introduction TEXT NOT NULL)' //创建表
let rdbStore: dataRdb.RdbStore = undefined //数据存储仓库

export default {
    onInitialized(abilityInfo) {//DataAbility初始化调用
        // hilog.info(0x0000, 'testTag', '%{public}s', 'DataAbility onInitialized');
        console.info("DataAbility onInitialized, abilityInfo:" + abilityInfo.bundleName)
        let context = featureAbility.getContext()//获取当前的对象
        dataRdb.getRdbStore(context, STORE_CONFIG, 1, (err, store) => {
            console.info('DataAbility getRdbStore callback')
            store.executeSql(SQL_CREATE_TABLE, [])
            rdbStore = store
        });
    },
    insert(uri, valueBucket, callback) {
        console.info('DataAbility insert start')
        rdbStore.insert(TABLE_NAME, valueBucket, callback)
    },
    batchInsert(uri, valueBuckets, callback) {
        console.info('DataAbility batch insert start')
        for (let i = 0;i < valueBuckets.length; i++) {
            console.info('DataAbility batch insert i=' + i)
            if (i < valueBuckets.length - 1) {
                rdbStore.insert(TABLE_NAME, valueBuckets[i], (err: any, num: number) => {
                    console.info('DataAbility batch insert ret=' + num)
                })
            } else {
                rdbStore.insert(TABLE_NAME, valueBuckets[i], callback)
            }
        }
    },
    query(uri, columns, predicates, callback) {
        console.info('DataAbility query start')
        let rdbPredicates = dataAbility.createRdbPredicates(TABLE_NAME, predicates)
        rdbStore.query(rdbPredicates, columns, callback)
    },
    update(uri, valueBucket, predicates, callback) {
        console.info('DataAbilityupdate start')
        let rdbPredicates = dataAbility.createRdbPredicates(TABLE_NAME, predicates)
        rdbStore.update(valueBucket, rdbPredicates, callback)
    },
    delete(uri, predicates, callback) {
        console.info('DataAbilitydelete start')
        let rdbPredicates = dataAbility.createRdbPredicates(TABLE_NAME, predicates)
        rdbStore.delete(rdbPredicates, callback)
    }
};
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当你用以下调用

//service.ts(其中一个ability)
import hilog from '@ohos.hilog';

import featureAbility from '@ohos.ability.featureAbility'
import ohos_data_ability from "@ohos.data.dataAbility"
import ohos_data_rdb from '@ohos.data.rdb'

var urivar = "dataability://com.example.myapplication.DataAbility1"
var DAHelper = featureAbility.acquireDataAbilityHelper(
    urivar
);
var valuesBucket = {"name": "chentianyu"}
var da = new ohos_data_ability.DataAbilityPredicates()
var valArray =new Array("value1");
var cars = new Array({"batchInsert1" : "value1",});

export default {

    insertOne(){
        DAHelper.insert(urivar,valuesBucket,(error, data)=>{
            console.log("DAHelper insert result: " + data)
        })
    },
    onStart() {
        // hilog.info(0x0000, 'testTag', '%{public}s', 'ServiceAbility onStart');
        console.info("serive1 start")
        this.insertOne()
    },

    onStop() {
        hilog.info(0x0000, 'testTag', '%{public}s', 'ServiceAbility onStop');
    },
    onCommand(want, startId) {
        hilog.info(0x0000, 'testTag', '%{public}s', 'ServiceAbility onCommand');
    },

};
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启动程序后出现一下日志(Log)

所以我们要看DataAbility接口开发

其实是dataability:///+bundleName+Name不是dataability://+bundleName+Name,这bundleName和Name上面有讲(ets获取service的bundleName)


这样,PageAbility、ServiceAbility、DataAbility就可以联动起来了