构建更智能的可穿戴应用:集成 WeatherKit 与 CalendarKit
Source: Dev.to
项目概述
- 显示当前天气(温度、天气状况)
- 从 CalendarKit 拉取今天的日程事件
- 提供上下文感知的提示(例如:“在上午 10 点的会议前带把伞”)
设置
在 module.json5 中启用 Kit
{
"module": {
"requestPermissions": [
"ohos.permission.READ_CALENDAR",
"ohos.permission.INTERNET",
"ohos.permission.ACCESS_INTERNET"
],
"deviceType": ["wearable"],
"abilities": [
{
"name": "EntryAbility",
"srcEntry": "./ets/MainAbility/EntryAbility.ets"
}
]
},
"features": [
{ "name": "weather", "optional": false },
{ "name": "calendar", "optional": false }
]
}
在 .ets 文件中导入所需 Kit
import weather from '@ohos.weather';
import calendar from '@ohos.calendar';
第一步:使用 WeatherKit 获取天气数据
创建可复用的 WeatherService,根据当前位置信息获取天气(假设已获取位置权限)。
// WeatherService.ets
export class WeatherService {
async getCurrentWeather(): Promise {
const weatherInfo = await weather.getWeatherByLocation();
return {
temperature: weatherInfo.realtime?.temperature ?? '--',
condition: weatherInfo.realtime?.text ?? 'Unknown'
};
}
}
第二步:使用 CalendarKit 获取今天的日程事件
通过 CalendarKit API 拉取今天的事件。
// CalendarService.ets
export class CalendarService {
async getTodayEvents(): Promise {
const start = new Date();
start.setHours(0, 0, 0, 0);
const end = new Date();
end.setHours(23, 59, 59, 999);
const events = await calendar.queryEvents({
beginTime: start.getTime(),
endTime: end.getTime()
});
return events.map(event =>
`${new Date(event.beginTime).toLocaleTimeString()} - ${event.title}`
);
}
}
第三步:生成智能建议
ContextEngine 将天气数据和日程事件结合,生成每日建议。
// ContextEngine.ets
import { WeatherService } from './WeatherService';
import { CalendarService } from './CalendarService';
export class ContextEngine {
private weatherService = new WeatherService();
private calendarService = new CalendarService();
async getDailySuggestion(): Promise {
const weather = await this.weatherService.getCurrentWeather();
const events = await this.calendarService.getTodayEvents();
if (weather.condition.includes('Rain') && events.length > 0) {
return `🌧️ Rain expected. Take an umbrella before your "${events[0]}"`;
} else if (parseInt(weather.temperature) > 30) {
return `🥵 It's hot today. Stay hydrated and wear light clothes.`;
} else {
return `✅ Weather looks good. You’re all set for your day!`;
}
}
}
第四步:在智能手表 UI 上展示所有内容
一个简易的 ArkUI 页面展示天气信息、日程事件以及智能建议。
// pages/PlannerPage.ets
import { ContextEngine } from '../services/ContextEngine';
@Entry
@Component
struct PlannerPage {
@State temperature: string = '--';
@State condition: string = 'Loading...';
@State events: string[] = [];
@State suggestion: string = 'Analyzing...';
private contextEngine = new ContextEngine();
async aboutToAppear() {
const weather = await this.contextEngine.weatherService.getCurrentWeather();
const events = await this.contextEngine.calendarService.getTodayEvents();
const smartSuggestion = await this.contextEngine.getDailySuggestion();
this.temperature = weather.temperature;
this.condition = weather.condition;
this.events = events;
this.suggestion = smartSuggestion;
}
build() {
Column({ space: 10 }) {
Text(`🌡️ ${this.temperature}° - ${this.condition}`)
.fontSize(20)
.fontWeight(FontWeight.Bold)
Text('📅 Today’s Events:')
.fontSize(18)
.fontWeight(FontWeight.Medium)
ForEach(this.events, (event: string) => {
Text(event).fontSize(14)
}, item => item)
Divider()
Text(`🧠 Suggestion:`).fontSize(18).fontWeight(FontWeight.Medium)
Text(this.suggestion).fontSize(16).fontColor(Color.Blue)
}
.padding(20)
}
}
输出预览
手表上的示例界面:
🌡️ 22° — Light Rain
📅 Today’s Events:
09:00 AM - Team Stand‑up
14:30 PM - Project Review
🧠 Suggestion:
🌧️ Rain expected. Take an umbrella before your "09:00 AM - Team Stand‑up"
最后思考
HarmonyOS 可穿戴设备的功能远不止运动追踪。通过结合 WeatherKit 与 CalendarKit,你可以提供深度个性化、实时帮助用户的体验。
想进一步提升?
- 使用 LocationKit 提升定位精度。
- 添加 BackgroundTaskKit 定期刷新数据。
- 扩展至多天预报或循环事件。
结论
Smart Day Planner 应用展示了开发者如何在 HarmonyOS 可穿戴设备上利用 WeatherKit 与 CalendarKit,打造真正的上下文感知与智能用户体验。通过动态组合:
- 实时天气状况
- 今日日程事件
- 基于逻辑的上下文建议
手表从被动配件转变为主动助理。此类集成可用于:
- 健康类应用(根据天气调整补水提醒)
- 健身类应用(在暴雨天推荐室内锻炼)
- 生产力工具(提供穿衣或通勤建议)
- 智能衣橱应用(依据日程和天气推荐穿搭)
在这些核心 Kit 的基础上继续构建,开发者能够在不同情境下扩展逻辑,提供深度个性化的 HarmonyOS 体验。
参考资料
- OpenCms demo – Huawei Developer
- 更多关于 WeatherKit、CalendarKit、LocationKit 与 BackgroundTaskKit 的文档,请访问华为开发者门户。