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README
Apache-2.0

ArkUI Android平台适配层

简介

ArkUI框架是OpenHarmony UI开发框架,提供基础类、容器类、画布类等UI组件,当前支持类Web编程范式和声明式编程范式。

图 1 ArkUI框架架构

ArkUI框架包括应用层(Application)、前端框架层(Framework)、引擎层(Engine)和平台适配层(Porting Layer)。

  • Application

    应用层表示开发者使用JS UI框架开发的FA应用,这里的FA应用特指JS FA应用。

  • Framework

    前端框架层主要完成前端页面解析,以及提供MVVM(Model-View-ViewModel)开发模式、页面路由机制和自定义组件等能力。

  • Engine

    引擎层主要提供动画解析、DOM(Document Object Model)树构建、布局计算、渲染命令构建与绘制、事件管理等能力。

  • Porting Layer

    适配层主要完成对平台层进行抽象,提供抽象接口,可以对接到系统平台。比如:事件对接、渲染管线对接和系统生命周期对接等。

本项目基于上述平台适配层的接口,实现对接Android平台的适配,可以帮助开发者将基于ArkUI开发的应用运行在标准的Android设备上。

目录介绍

ArkUI开发框架的源代码结构参见代码工程结构及构建说明,Android平台的适配代码在/foundation/arkui/ace_engine/adapter/android下,目录结构如下图所示:

/foundation/arkui/ace_engine/adapter/android
├── build                         # 编译配置
├── capability                    # 系统平台能力适配
├── entrance                      # 启动入口相关适配
├── osal                          # 操作系统抽象层
└── test                          # 测试相关

使用说明

参考应用开发者文档可以创建出跨平台应用工程,在Android平台集成开发时,Android应用的入口Application和Activity需要继承自ArkUI-X提供的两个基类AceActivity和AceApplication,并调用相应接口传入开发范式类型以及ArkUI模块实例名称,即可构建ArkUI跨Android平台应用,具体如下:

Android应用的入口Application和Activity需要继承自ArkUI提供的基类,具体如下:

import ohos.ace.adapter.AceApplication;

public class MyApplication extends AceApplication {
    @Override
    public void onCreate() {
        super.onCreate();
    }
}
import ohos.ace.adapter.AceActivity;

public class MainActivity extends AceActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setVersion(VERSION_ETS);            // ArkUI开发范式类型,VERSION_JS:兼容JS的类Web开发范式,VERSION_ETS:基于ArkTS的声明式开发范式。
        setInstanceName("MainAbility");   // ArkUI JSBundle在应用工程assets/js中存放的目录名(即模块实例名)。
        super.onCreate(savedInstanceState);
    }
}

其中AceActivity提供两个方法,分别用于设置当前Activity对应的ArkUI模块实例名称和使用的开发范式:

/**
* set the instance name, should called before super.onCreate()
* 
* @param name the instance name to set
*/
public void setInstanceName(String name);

/**
* set arkui app type version
* 
* @param version the version of app type, can be one of this:
*                VERSION_JS / VERSION_ETS, should called before super.onCreate()
*/
public void setVersion(int version);

经过上述配置,该应用启动时会自动加载对应的ArkUI模块源码执行并渲染显示。

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ArkUI-X adaptation to Android | ArkUI-X支持Android平台的适配层 展开 收起
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