引言
在实际应用开发中,时不时的会遇到AI领域相关的一些技术,本节旨在详细讲述关键字获取技术,关键字获取涉及各个领域中,如:游记摘要、新闻标签、杂志文刊等。所以对于HarmonyOS开发者而言,了解和掌握HarmonyOS AI领域相关技术是至关重要的,也是每一个HarmonyOS开发者的一项必不可少的专业技能。
功能介绍
关键字提取主要用于从新闻和邮件里提取出关键字,便于用户快速获取新闻和邮件的主题。关键字可以为有意义的实体,比如,人名、电影,也可以为非实体的关键词汇,如,上课、考研。
开发指南
1、使用NluClient静态类进行初始化,通过异步方式获取服务的连接
- NluClient.getInstance().init(context, new OnResultListener<Integer>(){
- @Override
- public void onResult(Integer result){
- // 初始化成功回调,在服务初始化成功调用该函数
- }
- }, true);
2、调用获取关键词提取方法得到分析结果,同一个接口提供了同步和异步两个方法
同步:
- String requestData= "{number:2,body:'今天我们一起去上课吧',title:'一起去上课'}";
- ResponseResult respResult = NluClient.getInstance().getKeywords(requestData, NluRequestType.REQUEST_TYPE_LOCAL);
- if (null != respResult){
- // 获取接口返回结果,参考接口文档返回使用
- String result = respResult.getResponseResult();
- }
异步:
- // 待分析文本
- String requestData= "{number:2,body:'今天我们一起去上课吧',title:'一起去上课'}";
- // 调用接口
- NluClient.getInstance().getKeywords(requestData, NluRequestType.REQUEST_TYPE_LOCAL,new OnResultListener<ResponseResult>(){
- @Override
- public void onResult(ResponseResult respResult)
- {
- // 异步返回
- if(null != respResult && NluError.SUCCESS_RESULT == respResult.getCode())
- {
- // 获取接口返回结果,参考接口文档返回使用
- String result = respResult.getResponseResult();
- }
- }
- });
3、使用结束调用destroy()方法释放进程资源
- NluClient.getInstance().destroy(this);
示例代码
1、xml布局
- <?xml version="1.0" encoding="utf-8"?>
- <DirectionalLayout
- xmlns:ohos="http://schemas.huawei.com/res/ohos"
- ohos:height="match_parent"
- ohos:orientation="vertical"
- ohos:width="match_parent">
- <Text
- ohos:background_element="$graphic:background_ability_main"
- ohos:height="match_content"
- ohos:layout_alignment="horizontal_center"
- ohos:multiple_lines="true"
- ohos:text="$string:title"
- ohos:top_margin="50vp"
- ohos:text_size="50"
- ohos:width="match_content"
- />
- <Text
- ohos:background_element="$graphic:background_ability_main"
- ohos:height="match_content"
- ohos:layout_alignment="horizontal_center"
- ohos:multiple_lines="true"
- ohos:left_margin="10vp"
- ohos:right_margin="10vp"
- ohos:text="body:'同步-今天我们一起去上课吧',title:'同步-一起去上课'-body:'异步-今天我们一起去上班吧',title:'异步-我们去上班'"
- ohos:top_margin="50vp"
- ohos:text_size="50"
- ohos:width="match_content"
- />
- <Text
- ohos:background_element="$graphic:background_ability_main"
- ohos:height="match_content"
- ohos:id="$+id:text_content"
- ohos:layout_alignment="horizontal_center"
- ohos:multiple_lines="true"
- ohos:top_margin="50vp"
- ohos:left_margin="10vp"
- ohos:right_margin="10vp"
- ohos:text_size="50"
- ohos:width="match_content"
- />
- <Text
- ohos:background_element="$graphic:background_ability_main"
- ohos:height="match_content"
- ohos:id="$+id:text_asynchronous"
- ohos:layout_alignment="horizontal_center"
- ohos:text="$string:asynchronous"
- ohos:top_margin="50vp"
- ohos:text_size="50"
- ohos:width="match_content"
- />
- <Text
- ohos:background_element="$graphic:background_ability_main"
- ohos:height="match_content"
- ohos:id="$+id:text_synchronization"
- ohos:layout_alignment="horizontal_center"
- ohos:text="$string:synchronization"
- ohos:top_margin="50vp"
- ohos:text_size="50"
- ohos:width="match_content"
- />
- </DirectionalLayout>
2、案例代码
- package com.example.keywords.slice;
- import com.example.keywords.ResourceTable;
- import ohos.aafwk.ability.AbilitySlice;
- import ohos.aafwk.content.Intent;
- import ohos.agp.components.Component;
- import ohos.agp.components.Component.ClickedListener;
- import ohos.agp.components.Text;
- import ohos.ai.nlu.NluClient;
- import ohos.ai.nlu.NluRequestType;
- import ohos.ai.nlu.ResponseResult;
- import ohos.ai.nlu.util.NluError;
- public class MainAbilitySlice extends AbilitySlice implements ClickedListener {
- private Text text_content;
- @Override
- public void onStart(Intent intent) {
- super.onStart(intent);
- super.setUIContent(ResourceTable.Layout_ability_main);
- text_content = (Text) findComponentById(ResourceTable.Id_text_content);
- Text text_synchronization = (Text) findComponentById(ResourceTable.Id_text_synchronization);
- Text text_asynchronous = (Text) findComponentById(ResourceTable.Id_text_asynchronous);
- text_synchronization.setClickedListener(this);
- text_asynchronous.setClickedListener(this);
- // 使用NluClient静态类初始化,通过异步方式获取服务连接
- NluClient.getInstance().init(this, null, true);
- }
- @Override
- public void onClick(Component component) {
- switch (component.getId()) {
- case ResourceTable.Id_text_synchronization:
- String requestData = "{number:3,body:'同步-今天我们一起去上课吧',title:'同步-一起去上课'}";
- ResponseResult responseResult = NluClient.getInstance()
- .getKeywords(requestData, NluRequestType.REQUEST_TYPE_LOCAL);
- if (responseResult != null) {
- text_content.setText(responseResult.getResponseResult());
- }
- break;
- case ResourceTable.Id_text_asynchronous:
- String rData = "{number:3,body:'异步-今天我们一起去上班吧',title:'异步-我们去上班'}";
- NluClient.getInstance().getKeywords(rData, NluRequestType.REQUEST_TYPE_LOCAL,
- responseResult1 -> {
- if (responseResult1 != null && NluError.SUCCESS_RESULT == responseResult1.getCode()) {
- getAbility().getUITaskDispatcher().syncDispatch(() -> text_content.setText(responseResult1.getResponseResult()));
- }
- });
- break;
- default:
- break;
- }
- }
- @Override
- protected void onBackground() {
- super.onBackground();
- NluClient.getInstance().destroy(this);
- }
- }
实现效果