Barometer 入门指南
本指南将引导您完成将 Capacitor Barometer 插件集成到应用中的过程。
使用 npm 安装插件:
npm install @capgo/capacitor-barometernpx cap synciOS 配置
Section titled “iOS 配置”将以下内容添加到 Info.plist:
<key>NSMotionUsageDescription</key><string>This app uses the barometer to measure atmospheric pressure</string>Android 配置
Section titled “Android 配置”无需额外配置。插件会自动请求必要的权限。
import { Barometer } from '@capgo/capacitor-barometer';检查传感器可用性
Section titled “检查传感器可用性”const checkBarometer = async () => { const { available } = await Barometer.isAvailable(); console.log('Barometer available:', available);};开始监测气压
Section titled “开始监测气压”const startMonitoring = async () => { await Barometer.start({ interval: 1000 // 更新间隔(毫秒) });
console.log('Barometer monitoring started');};监听气压事件
Section titled “监听气压事件”Barometer.addListener('pressureChange', (data) => { console.log('Pressure (hPa):', data.pressure); console.log('Relative altitude (m):', data.relativeAltitude); console.log('Timestamp:', data.timestamp);});获取当前读数
Section titled “获取当前读数”const getCurrentPressure = async () => { const reading = await Barometer.getCurrentReading(); console.log('Current pressure:', reading.pressure, 'hPa'); console.log('Relative altitude:', reading.relativeAltitude, 'm');};const stopMonitoring = async () => { await Barometer.stop(); console.log('Barometer monitoring stopped');};这是一个显示气压计集成的完整示例:
import { Barometer } from '@capgo/capacitor-barometer';
class BarometerService { private listener: any;
async initialize() { // 检查可用性 const { available } = await Barometer.isAvailable(); if (!available) { console.error('Barometer not available on this device'); return; }
// 开始监测 await Barometer.start({ interval: 1000 });
// 添加监听器 this.listener = Barometer.addListener('pressureChange', (data) => { this.handlePressureChange(data); }); }
handlePressureChange(data: any) { console.log('Pressure:', data.pressure, 'hPa'); console.log('Altitude:', data.relativeAltitude, 'm');
// 更新 UI 或处理数据 this.updateDisplay(data); }
updateDisplay(data: any) { // 将 hPa 转换为其他单位 const inHg = (data.pressure * 0.02953).toFixed(2); const mmHg = (data.pressure * 0.750062).toFixed(1);
console.log(`Pressure: ${data.pressure.toFixed(1)} hPa`); console.log(` ${inHg} inHg`); console.log(` ${mmHg} mmHg`); console.log(`Altitude: ${data.relativeAltitude.toFixed(1)} m`); }
async cleanup() { // 移除监听器 if (this.listener) { this.listener.remove(); }
// 停止监测 await Barometer.stop(); }}
// 使用const barometerService = new BarometerService();barometerService.initialize();
// 完成后清理// barometerService.cleanup();- 以百帕 (hPa) 或毫巴 (mb) 为单位测量
- 标准海平面气压:1013.25 hPa
- 海拔越高 = 气压越低
- 天气系统影响气压读数
- 从气压变化计算得出
- 相对于起始参考点
- 精度:±10-30 米
- 最适合短期跟踪
- 检查可用性:使用前始终验证传感器可用性
- 合理间隔:不要轮询太频繁(1000ms 比较好)
- 移除监听器:不需要时清理监听器
- 校准:使用已知高度进行准确读数
- 电池影响:持续感应时监控电池使用情况
传感器不可用
Section titled “传感器不可用”try { const { available } = await Barometer.isAvailable(); if (!available) { // 回退到 GPS 高度或手动输入 showAlternativeMethod(); }} catch (error) { console.error('Barometer check failed:', error);}class PressureFilter { private readings: number[] = []; private maxReadings = 5;
addReading(pressure: number): number { this.readings.push(pressure); if (this.readings.length > this.maxReadings) { this.readings.shift(); }
// 返回移动平均值 const sum = this.readings.reduce((a, b) => a + b, 0); return sum / this.readings.length; }}