ArkUI-X在Android上使用Fragment开发指南
本文介绍将ArkUI框架的UIAbility跨平台部署至Android平台Fragment的使用说明，实现Android原生Fragment和ArkUI跨平台Fragment的混合开发，方便开发者灵活部署跨平台界面。Android工程配置
Android工程的PackageName需要与OpenHarmony工程的BundleName一致；
请在Android应用的gradle.properties文件，使能AndroidX：
android.useAndroidX=true请在Android应用的build.gradle文件增加AndroidX Fragment库的依赖项：
dependencies {
implementation'androidx.appcompat:appcompat:1.4.1'
}ArkUI-X和Android平台集成所用关键类
应用工程Android逻辑部分的StageApplication
应用需要继承arkui_android_adapter.jar包所提供的StageApplication。StageApplication用于初始化资源路径以及加载配置信息，例如：
package com.example.myapplication;
import ohos.stage.ability.adapter.StageApplication;
public class MyApplication extends StageApplication {
}应用工程Android逻辑部分Fragment的宿主Activity
原生Activity需要继承androidx.fragment.app.FragmentActivity，绑定StageFragment示例如下：
package com.example.myapplication;
import android.os.Bundle;
import androidx.fragment.app.FragmentActivity;
import androidx.fragment.app.FragmentManager;
import ohos.stage.ability.adapter.StageFragment;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>super.onCreate(savedInstanceState);
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>setContentView(R.layout.activity_main);
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>StageFragment fragment = new HiFragment();
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>FragmentManager manager = getSupportFragmentManager();
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>manager.beginTransaction().add(R.id.frag,fragment).commit();
}
}其中activity_main.xml文件示例如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>如果当前StageFragment对应的UIAbility涉及页面跳转，Activity需要重写onBackPressed方法，以便在手机back键点击或手势侧滑时逐级返回页面，否则会退出跨平台承载的Activity页面。
@Overridepublic void onBackPressed() { if(fragment.onBackPressed()) {<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>super.onBackPressed(); }}参数传递
StageFragment支持传递参数，参数的传递需要通过setArguments()进行设置，规则如下：
key值为params
value为json格式
{ "params":[<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>{<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout> "key":键,<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout> "type":参数类型值,<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout> "value":值<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>},<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>{<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout> } ]}支持的参数类型列表
参数类型参数类型值boolean1int5double9string10示例：
StageFragment fragment = new HiFragment();
Bundle args = new Bundle();
args.putString("params", "{\"params\":[{\"key\":\"path\",\"type\":10,\"value\":\"local\"}]}");
fragment.setArguments(args);应用工程Android逻辑部分的StageFragment
Fragment需要继承arkui_android_adapter.jar包所提供的StageFragment，StageFragment主要功能是将Android中Fragment的生命周期与OpenHarmony中UIAbility的生命周期进行映射，例如：
package com.example.myapplication;import ohos.stage.ability.adapter.StageFragment;public class HiFragment extends StageFragment { @Override protected void onCreate(Bundle savedInstanceState) {<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>super.setInstanceName("com.example.myapplication:entry:EntryAbility:");<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>super.onCreate(savedInstanceState); }}为了将Fragment和UIAbility进行关联，需要重写StageFragment中的onCreate事件，在super.onCreate(savedInstanceState)之前设置instanceName，规则如下：
bundleName:moduleName:abilityName:其中bundleName的值来自于OpenHarmony应用中app.json5配置文件，moduleName、abilityName的值来自于OpenHarmony应用中的module.json5配置文件。
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