鸿蒙开发入门指南_Python

// 引入组件  
import { text, button } from '@ohos.ui.components';  
  
@entry  
@component  
struct helloworld {  
  private message: string = 'hello, harmonyos!';  
  
  build() {  
    column() {  
      text(this.message)  
        .fontsize(50)  
        .fontweight(fontweight.bold)  
        .margin({ top: 20 })  
  
      button('click me')  
        .onclick(() => {  
          this.message = 'hello, world!';  
          this.$update(); // 更新ui  
        })  
        .margin({ top: 10 })  
    }  
  }  
}

3.4 页面路由与导航

// 在某个组件的某个方法中  
navigatetonewpage() {  
    router.push({  
        uri: 'pages/newpage/newpage',  
        params: {  
            key: 'value'  
        }  
    });  
}

3.5 应用配置与权限

{  
  "app": {  
    "bundlename": "com.example.myapp",  
    "vendor": "com.example",  
    "version": {  
      "code": 1,  
      "name": "1.0"  
    },  
    "permissions": [  
      {  
        "name": "ohos.permission.internet"  
      }  
    ]  
  },  
  "deviceconfig": {  
    "default": {}  
  },  
  "module": {  
    "package": "com.example.myapp",  
    "name": ".mainability",  
    "reqcapabilities": [  
      "video_support",  
      "microphone"  
    ],  
    "devicetype": [  
      "phone",  
      "tablet"  
    ],  
    "distro": {  
      "deliverywithinstall": true,  
      "modulename": "entry",  
      "moduletype": "entry"  
    },  
    "abilities": [  
      {  
        "name": "mainability",  
        "srcpath": "entry/src/main/ets/mainability/mainability.ts",  
        "visible": true,  
        "description": "$string:mainability_description",  
        "icon": "$media:icon",  
        "label": "$string:entry_mainability",  
        "type": "page",  
        "orientation": "landscape"  
      }  
    ]  
  }  
}

四、鸿蒙系统的高级特性

4.1 分布式能力

4.2 安全与隐私

4.3 ai与机器学习

4.4 性能优化与调试

五、实战案例：开发一个简单的鸿蒙应用

5.1 创建项目

5.2 设计页面布局

// indexpage.ets  
@entry  
@component  
struct indexpage {  
  private message: string = 'hello, harmonyos!';  
  
  build() {  
    column() {  
      text(this.message)  
        .fontsize(24)  
        .fontweight(fontweight.bold)  
        .textalign(textalign.center)  
        .margin({ top: 50 })  
  
      button('change message')  
        .onclick(() => {  
          this.message = 'hello, world from harmonyos!';  
          this.$update();  
        })  
        .margin({ top: 20 })  
    }  
    .justifycontent(flexalign.center)  
    .alignitems(itemalign.center)  
  }  
}

5.3 配置应用入口

{  
  // ... 其他配置 ...  
  "module": {  
    // ... 其他模块配置 ...  
    "abilities": [  
      {  
        "name": "mainability",  
        "srcpath": "pages/index/indexpage.ets",  
        "visible": true,  
        "description": "$string:mainability_description",  
        "icon": "$media:icon",  
        "label": "$string:entry_mainability",  
        "type": "page",  
        "orientation": "portrait"  
      }  
    ]  
  }  
}