将后台地理位置数据发送到服务器

Question

我正在将数据从Ionic 3中的后台地理位置发送到服务器，因为我为此使用了REST API，但在我的情况下，API并未将数据发送到服务器。

这是我的代码：

this.userData = this.navParams.get('data');
        let clientId = this.userData.clientId;
        let role = this.userData.role;
        const config: BackgroundGeolocationConfig = {
            desiredAccuracy: 10,
            stationaryRadius: 20,
            distanceFilter: 1,
            debug: true, //  enable this hear sounds for background-geolocation life-cycle.
            stopOnTerminate: false, // enable this to clear background location settings when the app terminates
            notificationTitle: 'Nearby people check',
            notificationText: 'Share your location',
            interval: 500,
        }; 
        this.backgroundGeolocation.configure(config)
        .subscribe((location) => { 
            let longitude = location.longitude;
            let latitude = location.latitude;
            this.apiProvider.location(clientId, role, longitude, latitude).then(data=>{
                let apiData: any;
                apiData = data
                alert(apiData.code);
            });
        }); 
        this.backgroundGeolocation.start();

我想向服务器发送经度和纬度。