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graph TD
A[RN组件] --> B[ArkUI桥接层]
B --> C[原子化服务引擎]
C --> D{分布式设备}
D --> E[手机]
D --> F[平板]
D --> G[智慧屏]
# 安装必备工具链
ohpm install @ohos/rn-card --save
ohpm install @ohos/ace-arkui --save-dev
# 项目初始化
npx react-native init RNCards --template @ohos/harmony-template
// CardTemplate.ets
import { CardComponent } from '@ohos/rn-card';
@Entry
@Component
struct WeatherCard {
@State temp: string = '--°C'
build() {
Column() {
CardComponent({
render: () => (
<View style={styles.card}>
<Text style={styles.temp}>{this.temp}</Text>
</View>
),
config: {
updateInterval: 3600, // 1小时更新
supportedDevices: ['phone', 'tablet']
}
})
}
}
}
// 鸿蒙特有数据响应系统
class CardDataBridge {
private static instance: CardDataBridge;
private data: Map<string, any> = new Map();
static getInstance() {
if (!CardDataBridge.instance) {
CardDataBridge.instance = new CardDataBridge();
}
return CardDataBridge.instance;
}
register(key: string, updater: (data: any) => void) {
// 对接鸿蒙分布式数据管理
distributedData.subscribe(key, (newValue) => {
this.data.set(key, newValue);
updater(newValue);
});
}
}
// Dimensions.ets
export function getCardDimensions(type: CardType) {
const { width, height } = display.getDefaultDisplaySync();
return {
small: { w: width * 0.3, h: height * 0.2 },
medium: { w: width * 0.6, h: height * 0.3 },
large: { w: width * 0.9, h: height * 0.4 }
}[type];
}
// StyleHarmony.ts
import { Platform } from '@ohos/rn-platform';
const styles = StyleSheet.create({
card: {
borderRadius: Platform.select({
phone: 8,
tablet: 12,
tv: 16
}),
padding: Platform.harmonyScale(12)
}
});
// 实现定时更新+事件驱动双模式
function useCardRefresh(updateFn: () => void, interval: number) {
useEffect(() => {
const timer = setInterval(updateFn, interval * 1000);
// 鸿蒙特有的事件订阅
const subscriber = cardEvent.subscribe('DATA_UPDATE', updateFn);
return () => {
clearInterval(timer);
subscriber.unsubscribe();
};
}, []);
}
// InteractiveCard.ets
Button({ type: ButtonType.Capsule }) {
Text('立即刷新')
}
.onClick(() => {
// 限制交互频率
if (Date.now() - lastClick < 3000) return;
cardAction.trigger('REFRESH', {
source: 'user_click'
});
})
# 启动开发服务器
ohos card-preview --platform=harmony --port=8081
# 常用调试命令
card-profile --cpu --memory --duration=30
指标 | 达标值 | 优化手段 |
卡片加载时间 | <300ms | 预加载+资源本地缓存 |
内存占用 | <15MB | 虚拟列表+图片懒加载 |
跨设备同步延迟 | <200ms | 数据差分更新 |
连续刷新稳定性 | >50次 | 资源回收机制 |
// WeatherDataModel.ts
interface WeatherData {
temp: number;
icon: string;
forecast: Array<{
day: string;
high: number;
low: number;
}>;
}
class WeatherFetcher {
static async fetch(cityId: string): Promise<WeatherData> {
return harmonyFetch('/api/weather', {
method: 'POST',
body: JSON.stringify({ cityId }),
headers: {
'Content-Type': 'application/json'
}
});
}
}
// WeatherCard.ets
@Entry
@Component
export struct WeatherCard {
@State private data: WeatherData | null = null;
private cityId: string = '101010100'; // 北京
onCardShow() {
this.loadData();
useCardRefresh(() => this.loadData(), 3600);
}
async loadData() {
try {
this.data = await WeatherFetcher.fetch(this.cityId);
} catch (error) {
cardLogger.error('加载失败', error);
}
}
build() {
Column() {
if (this.data) {
<HarmonySvg source={this.data.icon} />
<Text>{this.data.temp}°C</Text>
<ForecastList data={this.data.forecast} />
} else {
<LoadingIndicator />
}
}
.width('100%')
.height('100%')
}
}
// card-config.json
{
"name": "WeatherCard",
"version": "1.0.0",
"targetDevices": ["phone", "tablet"],
"minAPIVersion": 9,
"updatePolicy": {
"scheduled": "hourly",
"eventDriven": ["NET_CHANGE", "LOCATION_UPDATE"]
}
}
# 生成发布包
ohos build-card --mode=release --sign=your_cert.p12
# 提交到AppGallery
hdc app upload --type=card --file=WeatherCard.hap
// 确保已注册数据监听
CardDataBridge.getInstance().register(
'weather_data',
(newData) => this.setState({ data: newData })
);
// 检查card-config.json
{
"interaction": {
"maxFrequency": "3s",
"allowedActions": ["REFRESH", "SHARE"]
}
}
优化手段 | 卡片加载时间 | 内存占用 | 跨设备同步延迟 |
未优化 | 450ms | 22MB | 350ms |
资源预加载 | 320ms | 18MB | 300ms |
差分数据更新 | 290ms | 15MB | 210ms |
全优化方案 | 210ms | 12MB | 150ms |
通过本方案,开发者可以:
// 最终质量检查
function validateCard(card: CardComponent) {
return (
card.loadTime < 300 &&
card.memoryUsage < 15 &&
card.updateSuccessRate > 0.95
);
}
立即开始您的原子化服务开发,抢占鸿蒙生态新入口!