安装软件

参考HUAWEI DevEco Studio – HarmonyOS应用开发官网，随后根据个人喜好进行个性化设置

注册登录

注册华为开发者账号，并进行实名认证，在软件中登录，登录成功后如下：

HelloWorld

HelloWorld代码不需要写，创建的时候就已经写好，我们重点要知道项目的目录结构，以及如何运行项目

目录结构及其内容

运行项目

随后单击如下位置的运行按钮即可

页面的包含关系

页面Ability，子页面AbilitySlice，也叫切片或者片段，随后才是内容

包含关系:
最外面是: Ability
Ability中是一-个或多个子页面: AbilitySlice
子页面中有要展示的内容:图片,文本等信息

配置文件

{
  "app": {
    "bundleName": "top.zhmq.myapplication",
    "vendor": "zhmq",
    "version": {
      "code": 1000000,
      "name": "1.0.0"
    }
  },
  "deviceConfig": {},
  "module": {
    "package": "top.zhmq.myapplication",
    "name": ".MyApplication",
    "mainAbility": "top.zhmq.myapplication.MainAbility",
    "deviceType": [
      "phone"
    ],
    "distro": {
      "deliveryWithInstall": true,
      "moduleName": "entry",
      "moduleType": "entry",
      "installationFree": false
    },
    "abilities": [
      {
        "skills": [
          {
            "entities": [
              "entity.system.home"
            ],
            "actions": [
              "action.system.home"
            ]
          }
        ],
        "orientation": "unspecified",
        "name": "top.zhmq.myapplication.MainAbility",
        "icon": "$media:icon",
        "description": "$string:mainability_description",
        "label": "$string:entry_MainAbility",
        "type": "page",
        "launchType": "standard"
      }
    ]
  }
}

项目的配置
app

厂商信息
项目的版本号

代码中的配置
module
比如:
所有的Ability

应用在设备上的配置信息
deviceConfig
比如:
应用运行时进程名
是否允许使用流量
是否支持未解锁时启动

启动流程

1. 解析config.json文件
2. 初始化
3. 获取入口Ability的全类名
4. 找到Ability,井运行
5. 运行Ability中的子界面
6. 加载xml文件，展示内容

相关核心代码，及其位置

"module": {
  "package": "top.zhmq.myapplication",
  "name": ".MyApplication",
  "mainAbility": "top.zhmq.myapplication.MainAbility",

public class MyApplication extends AbilityPackage {
    @Override
    public void onInitialize() {
        super.onInitialize();
    }
}

public class MainAbility extends Ability {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setMainRoute(MainAbilitySlice.class.getName());
    }
}

public class MainAbilitySlice extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);
    }

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

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

<?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="center"
    ohos:orientation="vertical">

    <Text
        ohos:id="$+id:text_helloworld"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:background_element="$graphic:background_ability_main"
        ohos:layout_alignment="horizontal_center"
        ohos:text="$string:mainability_HelloWorld"
        ohos:text_size="40vp"
        />

</DirectionalLayout>

{
  "string": [
    {
      "name": "entry_MainAbility",
      "value": "entry_MainAbility"
    },
    {
      "name": "mainability_description",
      "value": "Java_Empty Ability"
    },
    {
      "name": "mainability_HelloWorld",
      "value": "你好，世界"
    }
  ]
}