when I try to use mapController?.addSource() method, I need to get point value from web and mobile, so I got deference values for same LatLng.
can I match Point value between mobile and web ?
I was print point from onClick function, and try to convert LatLng to Point using latlngToScreenLocation() method.
await mapController?.addSource(
'parcels',
VectorSourceProperties(
tiles: [
'https://www.example.com/{x}/{y}/{z}'
],
minzoom: 15,
),
);
Related
enter image description hereI have created a 430-radius circle on Google Maps.
I want one functionality when I click outside of the circle radius then the message shows you are out of the zone.
If I clicked within the circle then I want to show the message you are in your zone.
I have created a 430-radius circle on Google Maps and I compared the latitude and longitude of my current location.
In OnTap I have shown on e Toast message you are in your zone.
The problem is when I press out of the circle the message shows you are in your zone.
Same when I clicked within the circle same message showed.
I have used the if-else statement but I can't achieve the functionality which I want.
final List _list = [
Marker(
markerId: MarkerId('1'),
position: LatLng(25.00057631014206, 55.297173890099394),
draggable: false, onDragEnd: (updatedLatLng) {
// checkUp(updatedLatLng);
}),
//position: LatLng(latSelected, lngSelected),
];
Set circles = Set.from([
Circle(
circleId: CircleId('1'),
center: LatLng(25.00057631014206, 55.297173890099394),
radius: 700,
strokeWidth: 2,
// strokeColor: Color(0xFFB2DEFF),
fillColor: Color(0xFFE4F0F9).withOpacity(0.5))
]);
There is a method onTap(LatLng) on google maps it will give you lattitude and longitude coords from parameters.
You can check from there whether the current coords are inside the circle or not.
In my app, posts include a location. Currently, I am able to get coordinates (latitude and longitude), but for obvious reasons, I don't want to display users' coordinates publicly. My goal is to get the city, state, and country from those coordinates and then show a radius over that city on a map instead of a pin directly on the coordinates. Is this possible in Flutter and are there any examples of it?
After checking the source code of google_maps_flutter plugin, there is an example there of using the circles argument of GoogleMap Widget's constructor.
And on Circle's API documentation, you may create a Circle with an unique ID, then supply it to GoogleMap Widget's constructor
import 'package:google_maps_flutter/google_maps_flutter.dart';
// declare one Circle
Circle aCircle = Circle(
circleId: CircleId('unique_id_for_your_circle'), // required, unique
consumeTapEvents: false, // or true if you want it to intercept onTap events
fillColor: Colors.blue.withOpacity(0.5,), // to give it a color
center: const LatLng(0.0, 0.0), // where it is centered on your Map
radius = 100.0, // it's size
onTap: () {}, // if you want it to intercept if consumeTapEvents is true, or set to null if not used
);
// your Widget constructor
GoogleMap(
// ...other required arguments
circles: <Circle>{aCircle,}, // add your [Circle]s here, it's a Set, not a List
);
In Flutter I use
google_maps_flutter, google_directions_api and flutter_polyline_points packages to have a map with the following functionalities;
Drawing routes between current location and destination points, get distance and durations between them, driver must be notified to take left/right while driving to the destination.
I have done these all, but when current location keeps updating on the map I'm calling direction api which return lots of data like legs and steps this api call is almost every second and google will charge me a lot.
Is anybody faced to same issue, I really appreciate a help.
There is part of my codes I have done so far
void _getCurrentLocation(context) {
showGeneralDialog(
context: context,
barrierDismissible: false,
barrierColor: Colors.black45,
pageBuilder: (BuildContext buildContext, Animation animation,
Animation secondaryAnimation) {
return Center(
child: Container(
width: MediaQuery.of(context).size.width - 10,
height: MediaQuery.of(context).size.height - 80,
padding: EdgeInsets.all(20),
color: Tingsapp.transparent,
child: CurrentLocation(),
),
);
}).then((location) {
if (location != null) {
_addMoverMarker(location, 'mover');
//updateFirebase(location);
_animateCameraToCurrentLocation(location);
}
});
}
destination point are already set.
In the above code I get user current location and add a marker as bellow
void _addMoverMarker(newLocationData, String id) async {
Uint8List imageData = await getMarker();
//LatLng latlng = LatLng(newLocationData.latitude, newLocationData.longitude);
LatLng latlng = LatLng(_moverLatitude!, _moverLongitude!);
MarkerId markerId = MarkerId(id);
Marker marker = Marker(
markerId: markerId,
position: latlng,
zIndex: 2,
icon: BitmapDescriptor.fromBytes(imageData),
infoWindow: InfoWindow(
title: "Mover location",
),
);
markers[markerId] = marker;
circle = Circle(
circleId: CircleId("circle"),
radius: 20,
zIndex: 1,
center: latlng,
strokeColor: Colors.orange.withAlpha(60),
fillColor: Colors.orange.withAlpha(300),
);
_getMoverPolyline(newLocationData);
}
and here I animate the camera
_animateCameraToCurrentLocation(newLocationData) {
if (_locationSubscription != null) {
_locationSubscription!.cancel();
}
_locationSubscription =
_locationTracker.onLocationChanged.listen((newLocationData) {
if (_mapController != null) {
_addMoverMarker(newLocationData, 'mover');
_animateCamera(_moverLatitude, _moverLongitude, 16.0);
//updateFirebase(newLocationData);
}
});
}
when I draw the polyline I call directions api here my problem starts
_getMoverPolyline(LocationData locationData) async {
PolylineResult result = await polylinePoints.getRouteBetweenCoordinates(
mapKey,
PointLatLng(_originLatitude!, _originLongitude!),
PointLatLng(_moverLatitude!, _moverLongitude!),
//PointLatLng(locationData.latitude!, locationData.longitude!),
travelMode: TravelMode.driving,
);
if (result.points.isNotEmpty) {
moverPolylineCoordinates = [];
result.points.forEach((PointLatLng point) {
moverPolylineCoordinates.add(LatLng(point.latitude, point.longitude));
});
}
_addMoverPolyLine();
_getDirections(_moverLatitude, _moverLongitude, _originLatitude,
_originLongitude).then((data){
_updateData(data);
});
}
_getDirections(_moverLatitude, _moverLongitude, _originLatitude, _originLongitude) async {
Api api = Api();
var res = await api.getDirections(
_moverLatitude, _moverLongitude, _originLatitude, _originLongitude);
var jsonData = jsonDecode(res.body);
print(jsonData['routes'][0]['legs'][0]);
return jsonData['routes'][0]['legs'][0];
}
In the above code _getDirections method gets calling every second.
Isn't possible to call directions api one time?
_updateData method update data like tern right/left or Head south on my map
No I don't think that it's good practice to keep calling the API. And even in the google_directions_api documentation, they say,
Note: This service is not designed to respond in real time to user input.
And to answer your main question..
Don't call the API every time the location changes, instead call it once using the current location. And the response contains everything you need to navigate the user. Check the maneuver key inside each step of a leg.
And you should only use the location subscription to update the current location and animate the camera on the map. Use the getLocation() method to get the current location before starting the trip and use that location to generate the route. Store that route in a variable and use the data inside the route response to display whatever you want.
It´s not a good practice to constantly call directionsAPI, for the good of your pocket and to follow the recommendations of google.
If you are creating a Navigation app you first need to call the Api when the user set a destination, capture de coordinates (overview_polyline) and after that if the user goes off the road you can use maps toolkit to determine when this occurs and after that call again directionsAPI.
I am using google_maps_flutter to show the maps of user location, I come up with an idea where user can click anything in maps and show the the coordinates they clicked. What I mean with the coordinates here is Lat and Lng position that the click from the maps. Is that possible to do that ? and are there some articles as guide for me to do that ?
use onTap callback of GoogleMap widget like below to get coordinates from map where use clicks.
GoogleMap(
onTap: (LatLng latLng) {
final lat = latLng.latitude;
final long = latLng.longitude;
},
);
I want to draw the navigation from my live location to destination. So I have used flutter_mapbox_navigation package and its working fine for navigation between two stored points.
RaisedButton(
child: Text("Start"),
onPressed: () async {
var wayPoints = List<WayPoint>();
wayPoints.add(_origin);
wayPoints.add(_stop1);
await _directions.startNavigation(
wayPoints: wayPoints,
options: MapBoxOptions(
mode:
MapBoxNavigationMode.drivingWithTraffic,
simulateRoute: true,
language: "en",
units: VoiceUnits.metric));
},
),
But I want to navigate between my live location and destination. How location package can be used so as to do the following?
A Flutter geolocation plugin that provides easy access to platform-specific location services (FusedLocationProviderClient or if not available the LocationManager on Android and CLLocationManager on iOS).