Java教程

【Harmony OS】【JAVA UI】鸿蒙应用如何集成OKHttp网络三方库

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 准备资料

接口准备

准备get请求接

cke_626.png​

Post接口

cke_1283.png​

参考资料

1.OKHttp

2.Android OkHttp常用详解

如何集成

1参考OKHttp的方法三

在项目级别的build.gradle添加如下代码

allprojects {
    repositories {
        maven {
            url 'https://repo.huaweicloud.com/repository/maven/'
        }
        maven {
            url 'https://developer.huawei.com/repo/'
        }
        allprojects{
            repositories{
                mavenCentral()
            }
        }
    }
}

在entry的build.gradle添加如下代码

  implementation 'io.openharmony.tpc.thirdlib:okgo:1.0.2'
    implementation 'io.openharmony.tpc.thirdlib:okrx:1.0.2'
    implementation 'io.openharmony.tpc.thirdlib:okrx2:1.0.2'
    implementation 'io.openharmony.tpc.thirdlib:okserver:1.0.2'

在entry的config.json添加 权限 代码如下

 "reqPermissions": [
      {
        "name": "ohos.permission.INTERNET"
      }
    ],

注意事项

如果接口是https的话需要在config.json的deviceConfig里添加如下代码

  "deviceConfig": {
    "default": {
      "network": {
        "cleartextTraffic": true
      }
    }
  },

 

界面实现

在layout的xml中写三个Text标签，第一个Text用于触发get请求的事件，第二个Text用于触发Post请求的事件，第三个Text用于显示结果，代码和效果图如下

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:alignment="horizontal_center"
    ohos:orientation="vertical">

    <Text
        ohos:id="$+id:text_type_get"
        ohos:height="100vp"
        ohos:width="match_parent"
        ohos:text_alignment="center"
        ohos:layout_alignment="horizontal_center"
        ohos:text="Get请求"
        ohos:text_size="40vp"
        />
    <Text
        ohos:id="$+id:text_type_Post"
        ohos:height="100vp"
        ohos:text_alignment="center"
        ohos:width="match_parent"
        ohos:background_element="#ed6262"
        ohos:layout_alignment="horizontal_center"
        ohos:text="Post请求"
        ohos:text_size="40vp"
        />
    <Text
        ohos:id="$+id:text_result"
        ohos:height="match_parent"
        ohos:multiple_lines="true"
        ohos:text_alignment="center"
        ohos:width="match_parent"
        ohos:layout_alignment="horizontal_center"
        ohos:text="显示结果"
        ohos:text_size="40vp"
        />


</DirectionalLayout>

cke_16866.png​

 

Get请求实现

在Get的Text点击事件，实现 Get请求和请求成功之后和请求失败之后（参考 线程管理开发指导）需要将子线程切到Ui线程进行显示数据，代码如下

    TextGet.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                OkHttpClient client = new OkHttpClient();
                Request.Builder requestBuilder = new Request.Builder();
                HttpUrl.Builder urlBuilder=HttpUrl.parse("http://web.juhe.cn/environment/air/cityair").newBuilder();//todo 接口链接
                urlBuilder.addQueryParameter("city","shanghai");//todo  参数
                urlBuilder.addQueryParameter("Key","******");// todo 密钥 key自己申请
                requestBuilder.url(urlBuilder.build());
                Call call = client.newCall(requestBuilder.build());
                call.enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        //todo 失败回调 需要回到主线程显示结果
                        getUITaskDispatcher().asyncDispatch(new Runnable() {
                            @Override
                            public void run() {
                                textResult.setText(e.getMessage());
                            }
                        });

                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        if(response.isSuccessful()){
                            String result = response.body().string();
                            //todo 处理UI需要切换到UI线程处理
                            getUITaskDispatcher().asyncDispatch(new Runnable() {
                                @Override
                                public void run() {
                                    textResult.setText(result);
                                }
                            });

                        }
                    }
                });
            }
        });

 

Post请求实现

在Post的Text实现点击事件，具体参考Android OkHttp常用详解，代码如下

TextPost.setClickedListener(new Component.ClickedListener() {
    @Override
    public void onClick(Component component) {
        OkHttpClient client = new OkHttpClient();
        FormBody body = new FormBody.Builder()
                .add("key","*****")// todo 密钥 key自己申请
                .add("date","10/1")//todo 日期参数
                .build();
        Request request = new Request.Builder()
                .url("http://v.juhe.cn/todayOnhistory/queryEvent.php")
                .post(body)
                .build();
        Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                //todo 失败回调 需要回到主线程显示结果
                getUITaskDispatcher().asyncDispatch(new Runnable() {
                    @Override
                    public void run() {
                        textResult.setText(e.getMessage());
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                if(response.isSuccessful()){
                    String result = response.body().string();
                    //处理UI需要切换到UI线程处理
                    //todo 失败回调 需要回到主线程显示结果
                    getUITaskDispatcher().asyncDispatch(new Runnable() {
                        @Override
                        public void run() {
                            textResult.setText(result);
                        }
                    });
                }
            }
        });
    }
});

 

运行效果

具体代码如下

java 代码

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;
import ohos.agp.components.Text;
import okhttp3.*;

import java.io.IOException;

public class MainAbilitySlice extends AbilitySlice {
    Text TextGet,TextPost,textResult;
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);
        TextGet=findComponentById(ResourceTable.Id_text_type_get);
        TextPost=findComponentById(ResourceTable.Id_text_type_Post);
        textResult=findComponentById(ResourceTable.Id_text_result);
        TextGet.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                OkHttpClient client = new OkHttpClient();
                Request.Builder requestBuilder = new Request.Builder();
                HttpUrl.Builder urlBuilder=HttpUrl.parse("http://web.juhe.cn/environment/air/cityair").newBuilder();//todo 接口链接
                urlBuilder.addQueryParameter("city","shanghai");//todo  参数
                urlBuilder.addQueryParameter("Key","6fba58dc50a8e3d92e8a2f63d25c7750");// todo key 密钥
                requestBuilder.url(urlBuilder.build());
                Call call = client.newCall(requestBuilder.build());
                call.enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        //todo 失败回调 需要回到主线程显示结果
                        getUITaskDispatcher().asyncDispatch(new Runnable() {
                            @Override
                            public void run() {
                                textResult.setText(e.getMessage());
                            }
                        });

                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        if(response.isSuccessful()){
                            String result = response.body().string();
                            //todo 处理UI需要切换到UI线程处理
                            getUITaskDispatcher().asyncDispatch(new Runnable() {
                                @Override
                                public void run() {
                                    textResult.setText(result);
                                }
                            });

                        }
                    }
                });
            }
        });
        TextPost.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                OkHttpClient client = new OkHttpClient();
                FormBody body = new FormBody.Builder()
                        .add("key","7496ca7e5e12c408ef14e465c2bacc79")// todo 密钥
                        .add("date","10/1")//todo 日期参数
                        .build();
                Request request = new Request.Builder()
                        .url("http://v.juhe.cn/todayOnhistory/queryEvent.php")
                        .post(body)
                        .build();
                Call call = client.newCall(request);
                call.enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        //todo 失败回调 需要回到主线程显示结果
                        getUITaskDispatcher().asyncDispatch(new Runnable() {
                            @Override
                            public void run() {
                                textResult.setText(e.getMessage());
                            }
                        });
                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        if(response.isSuccessful()){
                            String result = response.body().string();
                            //处理UI需要切换到UI线程处理
                            //todo 失败回调 需要回到主线程显示结果
                            getUITaskDispatcher().asyncDispatch(new Runnable() {
                                @Override
                                public void run() {
                                    textResult.setText(result);
                                }
                            });
                        }
                    }
                });
            }
        });
    }

    @Override
    public void onActive() {
        super.onActive();
    }

    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }
}

 

xml 代码

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:alignment="horizontal_center"
    ohos:orientation="vertical">

    <Text
        ohos:id="$+id:text_type_get"
        ohos:height="100vp"
        ohos:width="match_parent"
        ohos:text_alignment="center"
        ohos:layout_alignment="horizontal_center"
        ohos:text="Get请求"
        ohos:text_size="40vp"
        />
    <Text
        ohos:id="$+id:text_type_Post"
        ohos:height="100vp"
        ohos:text_alignment="center"
        ohos:width="match_parent"
        ohos:background_element="#ed6262"
        ohos:layout_alignment="horizontal_center"
        ohos:text="Post请求"
        ohos:text_size="40vp"
        />
    <Text
        ohos:id="$+id:text_result"
        ohos:height="match_parent"
        ohos:multiple_lines="true"
        ohos:text_alignment="center"
        ohos:width="match_parent"
        ohos:layout_alignment="horizontal_center"
        ohos:text="显示结果"
        ohos:text_size="40vp"
        />


</DirectionalLayout>

运行效果如下

04e802c1050ff1f71619ef29fbeb1738_384x811.gif%40900-0-90-f.gif​

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欲了解更多更全技术文章，欢迎访问https://developer.huawei.com/consumer/cn/forum/?ha_source=zzh

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