How openharmony starts fa (local and remote)

Hello everyone , Today, let's learn about distributed related content , In fact, for distributed task scheduling , Is another form of data management

Start local device FA

First create a project

As shown in the figure ：

Click on finish that will do

Then let's start with some basic settings

We will be having DAYU200 Run this instance on the development board , So make a signature setting

Click on File--- Project Struct,

And then click Signing Configs Complete signature settings

Click on ok Will complete automatic signature . In the here , Our first step is finished , Next, let's take a look at the next step

Back to our theme today , We are going to start another local FA, But there is only one , So we need to create another one at this time

stay entry Modules click New-Ability-PageAbility, You can create another FA, We call it SecondAbility

As shown in the figure below , We've created it

modify SecondAbility Default in message

  @State message: string = 'SecondAbility'​

Here, our second step is finished

Because we started it locally FA, In order to distinguish the remote startup FA, So we need to rename the file , This is convenient for us to know .

We click MainAbility‘ Medium index.ets, Right click to rename

Complete the above steps , The editor will help us with onfig.json Refactoring the project

{  "app": {    "vendor": "example",    "bundleName": "com.jianguo.openharmony",    "version": {      "code": 1000000,      "name": "1.0.0"    }  },  "deviceConfig": {},  "module": {    "mainAbility": ".MainAbility",    "deviceType": [      "phone",      "tablet"    ],    "abilities": [      {        "skills": [          {            "entities": [              "entity.system.home"            ],            "actions": [              "action.system.home"            ]          }        ],        "orientation": "unspecified",        "visible": true,        "srcPath": "MainAbility",        "name": ".MainAbility",        "srcLanguage": "ets",        "icon": "$media:icon",        "description": "$string:MainAbility_desc",        "formsEnabled": false,        "label": "$string:MainAbility_label",        "type": "page",        "launchType": "standard"      },      {        "orientation": "unspecified",        "srcPath": "SecondAbility",        "name": ".SecondAbility",        "srcLanguage": "ets",        "icon": "$media:icon",        "description": "$string:SecondAbility_desc",        "formsEnabled": false,        "label": "$string:SecondAbility_label",        "type": "page",        "launchType": "standard"      }    ],    "distro": {      "moduleType": "entry",      "installationFree": false,      "deliveryWithInstall": true,      "moduleName": "entry"    },    "package": "com.example.entry",    "srcPath": "",    "name": ".entry",    "js": [      {        "mode": {          "syntax": "ets",          "type": "pageAbility"        },        "pages": [          "pages/start_local_fa"        ],        "name": ".MainAbility",        "window": {          "designWidth": 720,          "autoDesignWidth": false        }      },      {        "mode": {          "syntax": "ets",          "type": "pageAbility"        },        "pages": [          "pages/index"        ],        "name": ".SecondAbility",        "window": {          "designWidth": 720,          "autoDesignWidth": false        }      }    ]  }}

Next, let's take a look at the most critical step , How to start local FA

We can use a button Button to jump it

The main thing is onclick The events inside

As shown in the figure below ：

Pay attention to importing packages when using ：

import featureAbiltty from '@ohos.ability.featureAbility'

featureAbiltty.startAbility({           want:           {             // equipment Id, This machine defaults to empty              deviceId:"",             //app name , stay config.json Of bundleName             bundleName:"com.jianguo.openharmony",             // Page name , Pay attention to the package name              abilityName:"com.example.entry.SecondAbility"​​           }

Then I'm on the top

• deviceId： For description, this machine defaults to empty ,

• bundleName： stay config.json Of bundleName

• abilityName： Page name , Pay attention to the package name

And then we were in DATU20 function

Find that you can jump , Then we have achieved this function

Cross device startup FAs

Next, let's see how to start the remote deviceId

before this , All we need to do is , stay config.json Configure permissions

Just define non sensitive permissions here , If it is a sensitive permission , It is necessary to send a pop-up window to deal with it at runtime .

"reqPermissions": [      {        "name": "ohos.permission.DISTRIBUTED_DATASYNC"      }    ]

Precautions for remote startup ：

jurisdiction deviceId

Dynamic application authority

// Device manager import deviceMAnager from'@ohos.distributedHardware.deviceManager'

import featureAbilty from '@ohos.ability.featureAbility'// Device manager import deviceMAnager from '@ohos.distributedHardware.deviceManager'// Distal app Information import bundle from '@ohos.bundle';import abilityAccessCtrl from '@ohos.abilityAccessCtrl';​// Dynamic application authority , Pop up window form , Can be used in general , Pay attention to modifying two places , One is the package name , One is the permission list async function requestPermision() {  let array: Array<string> = ["ohos.permission.DISTRIBUTED_DATASYNC"]​  const appInfo = await bundle.getApplicationInfo("com.jianguo.openharmony", 0, 100)  let tolenId = appInfo.accessTokenId;  const atManger = abilityAccessCtrl.createAtManager();  let requestPressions: Array<string> = []  // Traverse whether the permission passes   for (let i = 0;i < array.length; i++) {    let result = await atManger.verifyAccessToken(tolenId, array[i]);    if (result != abilityAccessCtrl.GrantStatus.PERMISSION_DENIED) {      requestPressions.push(array[i]);    }  }  if (requestPressions.length == 0 || requestPressions == []) {    return;​  }​  let context = featureAbilty.getContext();  context.requestPermissionsFromUser(requestPressions, 1, (data) => {​    console.info("XXXXXX data" + JSON.stringify(data))  })}​@[email protected] Index {  @State message: string = 'MainAbility'​  aboutToAppear() {    // When the page is about to be displayed , The runtime sends a pop-up window to handle     requestPermision();​​  }​  build() {    Row() {      Column() {        Text(this.message)          .fontSize(50)          .fontWeight(FontWeight.Bold)        Button(" Jump to remote SecondAbility", {          type: ButtonType.Capsule        }).backgroundColor(Color.Orange).onClick((event: ClickEvent) => {​​          deviceMAnager.createDeviceManager("com.jianguo.openharmony", (err, value) => {​​            if (!err) {              let devManager = value;              // Get the trusted list by synchronization               let deviceList = devManager.getTrustedDeviceListSync();              featureAbilty.startAbility({                want:                {                  // equipment Id, This machine defaults to empty , There are only two devices here , So use arrays [0] Express                   deviceId: deviceList[0].deviceId,                  //app name , stay config.json Of bundleName                  bundleName: "com.jianguo.openharmony",                  // Page name , Pay attention to the package name                   abilityName: "com.example.entry.SecondAbility"​​                }              }).then((value) => {​                console.log("Succes Data" + JSON.stringify(value))              }).catch((error) => {                console.log("failed Data" + JSON.stringify(error))              })            }          })​​        }).width(199)      }      .width('100%')    }    .height('100%')  }}

Connect local service

Why connect locally service, Background interaction needs

First create a local service

stay entry Modules click New-Ability-ServiceAbility, You can create another FA, We call it ServiceAbility, Click on Finish

You can see this information in the default file , Actually, we don't need , We can remove

export default {    onStart() {        console.info('ServiceAbility onStart');    },    onStop() {        console.info('ServiceAbility onStop');    },    onCommand(want, startId) {        console.info('ServiceAbility onCommand');    }};

Basic components

• Button