【Harmony OS】【ARK UI】ets使用startAbility或startAbilityForResult方式调起Ability

 今天学习一下怎么实现启动一个Ability文档讲解，主要分为“参考资料”“api讲解”,“运行效果”三个部分讲解，

1.参考资料

参考资料启动一个Ability

2.Api讲解

startAbility

参数

返回值

示例

  var str = { "want": {     "deviceId": "",     "bundleName": "",     "abilityName": "",     "uri": "",     "type": "image/*",     "options": {},     "action": "",     "parameters": {},     "entities": [  "entity.com.example.mytest.ENTITIES"     ] }, "abilityStartSetting": {}};featureAbility.startAbility(str).then((data) => {    console.info('Operation successful. Data: ' + JSON.stringify(data))}).catch((error) => {    console.error('Operation failed. Cause: ' + JSON.stringify(error));})

featureAbility.startAbilityForResult

startAbilityForResult(parameter: StartAbilityParameter, callback: AsyncCallback): void

以异步方法启动Ability并在结束的时候返回执行结果，使用callback形式返回结果。

参数：

示例

var str = {    "want": { "deviceId": "", "bundleName": "", "abilityName": "", "uri": "", "type": "", "action": "", "parameters": {}, "entities": [     "entity.com.example.mytest.ENTITIES" ]    },    "abilityStartSetting": {}};featureAbility.startAbilityForResult(str, (error, data) => {    if (error) { console.error('Operation failed. Cause: ' + error); return;    }    console.info('Operation succeeded: ' + data);});

补充说明

StartAbilityParameter

启动Ability所需参数。

Want

启动信息。

3.运行效果

3.1准备阶段

在新建OnceAbility和TwoAbility两个Ability界面，如下图示所示，包名为“com.harmony.alliance.myapplication”

config.json文件

2.在Index.ets写两个按钮“startAbility启动OnceAbility并传参”和“startAbilityForResult跳转TwoAbility”，代码如下

import featureAbility from '@ohos.ability.featureAbility';@Entry@Componentstruct Index {      build() {    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {      Text('startAbility启动OnceAbility并传参') .fontSize(50) .fontWeight(FontWeight.Bold)Text('startAbilityForResult跳转TwoAbility') .fontSize(50) .fontWeight(FontWeight.Bold).backgroundColor(Color.Red)    }    .width('100%')    .height('100%')  }}

效果如图所示

3.2实现“startAbility启动OnceAbility并传参”

ets 实现点击按钮功能，代码如下

bundleName：就是config.json的bundleName，

abilityName就是ability的名称，

parameters：作为传递的参数

在OnceAbilitySlice使用如下代码进行接收

Intent intent1=  getAbility().getIntent();IntentParams myIntentParams= intent1.getParams();myIntentParams.getParam("key1")

public startOnceAbility(){    var str = {      "want": { "deviceId": "", "bundleName": "com.harmony.alliance.myapplication", "abilityName": "OnceAbility", "uri": "", "action": "", "parameters":{key1:"value1",key2:"value2"}      },    };    featureAbility.startAbility(str)      .then((data) => { console.info('Operation successful. Data: ' + JSON.stringify(data))      }).catch((error) => {      console.error('Operation failed. Cause: ' + JSON.stringify(error));    })  }

OnceAbilitySlice的xml文件

效果如下

onceAbilitySlice代码如下

package com.harmony.alliance.myapplication.slice;import com.harmony.alliance.myapplication.ResourceTable;import ohos.aafwk.ability.AbilitySlice;import ohos.aafwk.content.Intent;import ohos.aafwk.content.IntentParams;import ohos.agp.components.Text;public class OnceAbilitySlice extends AbilitySlice {    Text mTvResult;    @Override    public void onStart(Intent intent) { super.onStart(intent); super.setUIContent(ResourceTable.Layout_ability_once); Intent intent1=  getAbility().getIntent(); IntentParams myIntentParams= intent1.getParams(); mTvResult=findComponentById(ResourceTable.Id_mTvResult); mTvResult.setText("参数："+"key1"+"===>"+myIntentParams.getParam("key1")+  "\n key2:"+"===>"+myIntentParams.getParam("key2"));    }    @Override    public void onActive() { super.onActive();    }    @Override    public void onForeground(Intent intent) { super.onForeground(intent);    }

3.3实现“startAbility启动OnceAbility并传参”

ets实现“startAbilityForResult跳转TwoAbility”ets代码如下

 public startTwoAbility(){    var str = {      "want": { "deviceId": "", "bundleName": "com.harmony.alliance.myapplication", "abilityName": "TwoAbility", "uri": "", "type": "", "action": "",      },      "abilityStartSetting": {}    };    featureAbility.startAbilityForResult(str, (error, data) => {      if (error) { console.error('Operation failed. Cause: ' + error); return;      }      console.info('Operation succeeded: ' + JSON.stringify(data));    });  }

twoAbilitySlice的xml代码如下

效果图如下

TwoabilitySlice的代码如下

package com.harmony.alliance.myapplication.slice;import com.harmony.alliance.myapplication.ResourceTable;import ohos.aafwk.ability.AbilitySlice;import ohos.aafwk.content.Intent;import ohos.agp.components.Component;public class TwoAbilitySlice extends AbilitySlice {    @Override    public void onStart(Intent intent) { super.onStart(intent); super.setUIContent(ResourceTable.Layout_ability_two); findComponentById(ResourceTable.Id_text_helloworld).setClickedListener(new Component.ClickedListener() {     @Override     public void onClick(Component component) {  Intent intent1 = new Intent();  intent1.setParam("key", "value");  getAbility().setResult(1001, intent1);  terminateAbility();     } });    }    @Override    public void onActive() { super.onActive();    }    @Override    public void onForeground(Intent intent) { super.onForeground(intent);    }}

ets全部代码如下

import featureAbility from '@ohos.ability.featureAbility';@Entry@Componentstruct Index {  public startOnceAbility(){    var str = {      "want": { "deviceId": "", "bundleName": "com.harmony.alliance.myapplication", "abilityName": "OnceAbility", "uri": "", "action": "", "parameters":{key1:"value1",key2:"value2"}      },    };    featureAbility.startAbility(str)      .then((data) => { console.info('Operation successful. Data: ' + JSON.stringify(data))      }).catch((error) => {      console.error('Operation failed. Cause: ' + JSON.stringify(error));    })  }  public startTwoAbility(){    var str = {      "want": { "deviceId": "", "bundleName": "com.harmony.alliance.myapplication", "abilityName": "TwoAbility", "uri": "", "type": "", "action": "",      },      "abilityStartSetting": {}    };    featureAbility.startAbilityForResult(str, (error, data) => {      if (error) { console.error('Operation failed. Cause: ' + error); return;      }      console.info('Operation succeeded: ' + JSON.stringify(data));    });  }  build() {    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {      Text('startAbility启动OnceAbility并传参') .fontSize(50) .fontWeight(FontWeight.Bold) .onClick(this.startOnceAbility.bind(this))      Text('startAbilityForResult跳转TwoAbility') .fontSize(50) .fontWeight(FontWeight.Bold) .onClick(this.startTwoAbility.bind(this)) .backgroundColor(Color.Red)    }    .width('100%')    .height('100%')  }}

运行效果如下