cordova location tracker at background

pauseEvent

document.addEventListener("pause", App.pauseEvent, false);

pauseEvent: function(){
             navigator.geolocation.watchPosition(
                function(pos){
                    App.latlngs.push(new L.LatLng(pos.coords.latitude, pos.coords.longitude)); 
                },
                function(err){
                    alert('Error:' + err);
                },
                { frequency:1000, maximumAge: 0 }
                );
        }

watchposition

navigator.geolocation.watchPosition(
                function(pos){
                    // App.map.setView([pos.coords.latitude, pos.coords.longitude], App.curZoom);
                    //build up the latlng array
                    App.latlngs.push(new L.LatLng(pos.coords.latitude, pos.coords.longitude));     
                    //remove the route before
                    if(App.route != null)
                        App.map.removeLayer(App.route);
                    //add the new latlng array on the map
                    App.route = L.polyline(App.latlngs,{color: 'red'}).addTo(App.map); 
                },
                function(err){
                    alert('Error:' + err);
                },
                { frequency:1000, maximumAge: 0 }
                );