HarmonyOSArkUI 鸿蒙 ets怎么调用PA

Posted 2022-05-16 华为开发者论坛

【问题描述】

文档描述了js调用pa案例，没有ets调用pa用例？接下来就是ets怎么调用pa

参考文档链接

​​https://developer.harmonyos.com/cn/docs/documentation/doc-references/js-apis-fa-calls-pa-featureability-0000000000617992​​

【解决方案】

第一步：新建pa的Ability（目前命名为MyServiceAbility）

参考资料链接

​​https://developer.harmonyos.com/cn/docs/documentation/doc-references/js-apis-fa-calls-pa-examples-0000000000618000​​

代码如下

// ohos相关接口包
 
public class ComputeInternalAbility extends AceInternalAbility 
    private static final String BUNDLE_NAME = "com.harmony.alliance.myets";
    private static final String ABILITY_NAME = "com.harmony.alliance.myets.ComputeInternalAbility";
    private static final int SUCCESS = 0;
    private static final int ERROR = 1;
    private static final int PLUS = 1001;
// 定义日志标签
private static final HiLogLabel LABEL = new HiLogLabel(HiLog.LOG_APP, 0, "MY_TAG");
    private static ComputeInternalAbility instance;
    private AbilityContext abilityContext;
    // 如果多个Ability实例都需要注册当前InternalAbility实例，需要更改构造函数，设定自己的bundleName和abilityName
    public ComputeInternalAbility() 
        super(BUNDLE_NAME, ABILITY_NAME);
    
    /**
     * Internal ability 注册接口。
     */
    public static void register(AbilityContext abilityContext) 
        instance = new ComputeInternalAbility();
        instance.onRegister(abilityContext);
    
 
    /**
     * Internal ability 注销接口。
     */
    public static void unregister() 
        instance.onUnregister();
    
 
    public boolean onRemoteRequest(int code, MessageParcel data, MessageParcel reply, MessageOption option) 
        switch (code) 
            case PLUS: 
               System.err.println("app log pa得到ets数据"+data.readString());
                Map<String, Object> result = new HashMap<String, Object>();
                result.put("code", SUCCESS);
                result.put("abilityResult", "Pa data");
                MessageParcel responseData = MessageParcel.obtain();
                responseData.writeString(ZSONObject.toZSONString(result));
                IRemoteObject remoteReply = reply.readRemoteObject();
                try 
                    remoteReply.sendRequest(0, responseData, MessageParcel.obtain(), new MessageOption());
                 catch (RemoteException exception) 
                    return false;
                 finally 
                    responseData.reclaim();
                
                break;
            
            default: 
                Map<String, Object> result = new HashMap<String, Object>();
                result.put("abilityError", ERROR);
                reply.writeString(ZSONObject.toZSONString(result));
                return false;
            
        
        return true;
    
 
    private void onRegister(AbilityContext abilityContext) 
        this.abilityContext = abilityContext;
        this.setInternalAbilityHandler((code, data, reply, option) -> 
            return this.onRemoteRequest(code, data, reply, option);
        );
    
 
private void onUnregister() 
        abilityContext = null;
        this.setInternalAbilityHandler(null);
    

第二步 查看config.json是否abilities是否该Pa配置文件

第三步 书写MainAbility的onStart（）和onStop（）代码 代码如下

package com.harmony.alliance.myets;
 
import ohos.ace.ability.AceAbility;
import ohos.aafwk.content.Intent;
import ohos.security.SystemPermission;
 
public class MainAbility extends AceAbility 
    @Override
    public void onStart(Intent intent) 
 
        ComputeInternalAbility.register(this);
        super.onStart(intent);
    
@Override
   public void onStop() 
        ComputeInternalAbility.unregister();
        super.onStop();
        SampleJSInterface.getInstance().deregister(this);
    

第四步 书写ets文件

@Entry
@Component
struct MyService 
  build() 
Flex( direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center ) 
      Text(ets调用pa)
        .fontSize(50)
        .onClick(function () 
          FeatureAbility.callAbility(
            bundleName: com.harmony.alliance.myets,
            abilityName: com.harmony.alliance.myets.ComputeInternalAbility,
            messageCode: 1001,
            abilityType: 1,
            data:  firstNum: 1, secondNum: 2 ,
            syncOption: 0
          ).then((data) => 
             console.log(pa传递给ets的数据  + data);
          )
 
        )
        .fontWeight(FontWeight.Bold)
    
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