零基础学鸿蒙编程网络请求

　　简要介绍
　　本文介绍如何在鸿蒙中使用网络请求，获取服务器数据并进行处理。 集成步骤entry工程的build.gradle中添加依赖     implementation ＂com.squareup.retrofit2:retrofit:2.5.0＂     implementation ＂com.squareup.retrofit2:converter-gson:2.5.0＂ 在config.json中添加权限     ＂reqPermissions＂: [       {         ＂name＂: ＂ohos.permission.INTERNET＂       }     ] 添加数据类:Task.java public class Task {     private int id;     private String name;      public int getId() {         return id;     }      public void setId(int id) {         this.id = id;     }      public String getName() {         return name;     }      public void setName(String name) {         this.name = name;     } }  添加网络接口管理类：ApiManager.java public class ApiManager {     private static final String BASE_URL = ＂https://gitee.com/＂;      private static ApiService apiService;     private static ApiManager instance = new ApiManager();      private ApiManager() {         apiService = new Retrofit.Builder()                 .baseUrl(BASE_URL)                 .addConverterFactory(GsonConverterFactory.create())                 .client(new OkHttpClient.Builder().build())                 .build().create(ApiService.class);     }      public static ApiManager getInstance() {         return instance;     }      public ApiService getApiService() {         return apiService;     } } 添加网络接口调用类:ApiService.java public interface ApiService {     @GET(＂hspbc/harmonyos_demos/raw/master/networkDemo/data.json＂)     Call queryTask(); }  java代码中调用:MainAbilitySlice.java public class MainAbilitySlice extends AbilitySlice {      @Override     public void onStart(Intent intent) {         super.onStart(intent);         super.setUIContent(ResourceTable.Layout_ability_main);         findComponentById(ResourceTable.Id_text).setClickedListener(component -> query());     }      private void query() {         ApiManager.getInstance().getApiService().queryTask().enqueue(new Callback() {             @Override             public void onResponse(Call call, Response response) {                 if (!response.isSuccessful() || response.body() == null) {                     onFailure(null, null);                     return;                 }                 Task result = response.body();                 new ToastDialog(getContext()).setText(result.getName()).show();             }              @Override             public void onFailure(Call call, Throwable throwable) {                 HiLog.warn(new HiLogLabel(HiLog.LOG_APP, 0, ＂===demo===＂), ＂网页访问异常＂);             }         });     } } 效果图
　　完整源代码
　　https://gitee.com/hspbc/harmonyos_demos/tree/master/networkDemo