Background Geolocation For Ionic2 - background

Question

i'm trying to use background geolocation , i found this link :
[a link] https://www.joshmorony.com/adding-background-geolocation-t…/ .
"Geoposition is not knwon " type script error .
ionic version :2.2.1 , node version :6.10.0 , cordova version:6.5.0 .any suggestion for ionic2 geoloca
location-tracker :
import { Injectable, NgZone } from '#angular/core';
import { Geolocation,Geoposition, BackgroundGeolocation } from 'ionic-native';
import 'rxjs/add/operator/filter';
#Injectable()
export class LocationTracker {
public watch: any;
public lat: number = 0;
public lng: number = 0;
constructor(public zone: NgZone) {
}
startTracking() {
// Background Tracking
let config = {
desiredAccuracy: 0,
stationaryRadius: 20,
distanceFilter: 10,
debug: true,
interval: 2000
};
BackgroundGeolocation.configure((location) => {
console.log('BackgroundGeolocation: ' + location.latitude + ',' + location.longitude);
// Run update inside of Angular's zone
this.zone.run(() => {
this.lat = location.latitude;
this.lng = location.longitude;
});
}, (err) => {
console.log(err);
}, config);
// Turn ON the background-geolocation system.
BackgroundGeolocation.start();
// Foreground Tracking
let options = {
frequency: 3000,
enableHighAccuracy: true
};
this.watch = Geolocation.watchPosition(options).filter((p: any) => p.code === undefined).subscribe((position: Geoposition ) => {
console.log(position);
// Run update inside of Angular's zone
this.zone.run(() => {
this.lat = position.coords.latitude;
this.lng = position.coords.longitude;
});
});
}
stopTracking() {
console.log('stopTracking');
BackgroundGeolocation.finish();
this.watch.unsubscribe();
}
}
tion

Answer 1

Assuming that you have already run the following commands;
ionic plugin add cordova-plugin-geolocation
npm install --save #ionic-native/geolocation
ionic plugin add cordova-plugin-mauron85-background-geolocation
npm install --save #ionic-native/background-geolocation
try importing the plugins as follows:
import { BackgroundGeolocation } from '#ionic-native/background-geolocation';
import { Geolocation, Geoposition } from '#ionic-native/geolocation';