HarmonyOS实现Java端类似Nine-Patch气泡聊天框代码

import ohos.aafwk.ability.delegation.AbilityDelegatorRegistry;
import ohos.agp.components.*;
import ohos.agp.components.element.PixelMapElement;
import ohos.app.Context;
import ohos.media.image.PixelMap;

public class ChatBubble extends DirectionalLayout {
    private Context context;

    public ChatBubble(Context context) {
        super(context);
        this.context = context;
        init();
    }

    private void init() {
        // 设置布局方向
        setOrientation(VERTICAL);

        // 加载 Nine-Patch 图片资源
        PixelMapElement ninePatchElement = new PixelMapElement(getPixelMap("resources/base/media/bubble.9.png"));
        
        // 创建 Text 组件，用于显示聊天文本
        Text chatText = new Text(context);
        chatText.setText("Hello, this is a sample chat bubble!");
        chatText.setTextSize(50);
        chatText.setPadding(50, 20, 50, 20);
        
        // 将 Nine-Patch 背景设置给 Text 组件
        chatText.setBackground(ninePatchElement);

        // 将 Text 组件添加到当前布局
        addComponent(chatText);
    }

    private PixelMap getPixelMap(String path) {
        try {
            ResourceManager resourceManager = AbilityDelegatorRegistry.getAbilityDelegator().getAppContext().getResourceManager();
            if (resourceManager != null) {
                Resource resource = resourceManager.getRawFileEntry(path).openRawFile();
                return PixelMap.decodeStream(resource, null);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

import ohos.aafwk.ability.Ability;
import ohos.aafwk.content.Intent;
import ohos.agp.components.ComponentContainer;
import ohos.agp.window.service.Window;

public class MainAbility extends Ability {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setMainRoute(MainAbilitySlice.class.getName());
        
        // 获取窗口并设置内容视图
        Window window = getWindow();
        ComponentContainer rootLayout = (ComponentContainer) LayoutScatter.getInstance(this)
                .parse(ResourceTable.Layout_ability_main, null, false);

        // 实例化单个聊天气泡
        ChatBubble chatBubble = new ChatBubble(this);
        
        // 添加聊天气泡到根布局
        rootLayout.addComponent(chatBubble);

        // 设置窗口显示内容
        window.setUIContent(rootLayout);
    }
}