I am working in Xamarin Android, I want to set clickable poly line on google map, am using this below code:
GoogleMap.IOnPolylineClickListener
Code:
var polylineoption = new PolylineOptions();
polylineoption.InvokeColor(Android.Graphics.Color.Blue);
polylineoption.Geodesic(true);
polylineoption.Clickable(true);
polylineoption.Add(latLngPoints);
RunOnUiThread(() =>
map.AddPolyline(polylineoption));
public void OnPolylineClick(Polyline polyline)
{
throw new NotImplementedException();
}
Related
var _locator = CrossGeolocator.Current;
var mapPosition = await _locator.GetPositionAsync();
var mapSpan = MapSpan.FromCenterAndRadius(
new Xamarin.Forms.Maps.Position(mapPosition.Latitude, mapPosition.Longitude),
Distance.FromMiles(2)
);
Map.MoveToRegion(mapSpan);
Using Xamarin.Forms.Maps.Postion() the correct lat and lon coordinates are calculated.
However, when I add it to MapSpan, the coordinates change to somewhere in the middle of the Atlantic ocean. Not sure what is causing this?
UPDATE:
So the problem is definitely in the Android project. For some reason, GoogleMaps is not recognizing the location passed by the Map Renderer in the shared project. OnMapReady is just using the default lat/lon.
SUCCESS!!!
async Task<Plugin.Geolocator.Abstractions.Position> GetPositionAsync()
{
var _locator = CrossGeolocator.Current;
Plugin.Geolocator.Abstractions.Position myPosition = await _locator.GetPositionAsync();
return myPosition;
}
public void OnMapReady(GoogleMap googleMap)
{
Plugin.Geolocator.Abstractions.Position myPosition = Task.Run(GetPositionAsync).Result;
map = googleMap;
map.MoveCamera(
CameraUpdateFactory.NewLatLng(
new LatLng(myPosition.Latitude, myPosition.Longitude)));
map.AnimateCamera(
CameraUpdateFactory.ZoomTo(10));
The MapSpan properties LatitudeDegree and LongitudeDegrees refer to the degrees of latitude and longitude that are spanned (i.e. the number of degrees of the map that are shown within its view.)
If you are looking for the lat/lng of the center of the map in your span, refer to the Center properties which is a Maps.Postion object.
Re: https://developer.xamarin.com/api/type/Xamarin.Forms.Maps.MapSpan/
Example:
var mapPosition = new Position(38.29, -77.45);
var mapSpan = MapSpan.FromCenterAndRadius(mapPosition, Distance.FromMiles(2));
map.MoveToRegion(mapSpan);
In Xamarin Forms, I am using a custom renderer in Android for a map I have implemented using Android.Gms.Maps I want to write functionality that adds a marker in the area a user clicked on the map.
public async void OnMapReady(GoogleMap googleMap)
{
map.MapClick+= HandleMapClick;
}
In my HandleMapClick() function, how do I use the addMarker() function to add a marker to the area which a user clicked on the map?
The GoogleMap.MapClickEventArgs contains a "Point" that contains the lat/long of the user' click. Create a MarkerOption, assign it that point and add it to your map.
googleMap.MapClick += (object sender, GoogleMap.MapClickEventArgs e) =>
{
using (var markerOption = new MarkerOptions())
{
markerOption.SetPosition(e.Point);
markerOption.SetTitle("StackOverflow");
// save the "marker" variable returned if you need move, delete, update it, etc...
var marker = googleMap.AddMarker(markerOption);
}
};
I have a page(fragment) that shows google maps together with 1 marker icon. So now i would like to pass source and destination coordinates to this map so that it can show the shortest route together with the distance in Km. E.g i want the map to show the blue path in the image below :
Here is my code :
private void SetUpMap()
{
if (GMap == null)
{
ChildFragmentManager.FindFragmentById<MapFragment>(Resource.Id.googlemap).GetMapAsync(this);
}
}
public void OnMapReady(GoogleMap googleMap)
{
this.GMap = googleMap;
GMap.UiSettings.ZoomControlsEnabled = true;
LatLng latlng = new LatLng(Convert.ToDouble(gpsLatitude), Convert.ToDouble(gpsLongitude));
CameraUpdate camera = CameraUpdateFactory.NewLatLngZoom(latlng, 15);
GMap.MoveCamera(camera);
MarkerOptions options = new MarkerOptions()
.SetPosition(latlng)
.SetTitle("Chennai");
GMap.AddMarker(options);
}
I got my answer from this post :
Adding polyline between two locations google maps api v2
I converted the java code to C# and it worked fine.
I use this code to add custom marker to BING map control. The Map component can't draw Image(), but text works fine. Am I wrong?
private void AddMarkerToMap(double Latitude, double Longitude, string Name)
{
Image markerImg = new Image { Width = 63, Height = 46 };
Uri imgUri = new Uri("Images/GeoPin.png", UriKind.RelativeOrAbsolute);
if (imgUri == null)
{
throw new Exception("Image can't be find");
}
markerImg.Source = new BitmapImage(imgUri);
markerImg.Tag = Name;
//markerImg.Tap += delegate
//{
// // handle tap
//};
var overlay = new MapOverlay
{
PositionOrigin = new Point(0.5, 0.5),
GeoCoordinate = new GeoCoordinate(Latitude, Longitude),
Content = markerImg,
//Content = Name,
};
var mapLayer = new MapLayer { overlay };
MyMap.Layers.Add(mapLayer);
}
If you want to add a pin to Map, use MapIcon class. This can display images as well as text.
private void AddMapIcon()
{
MapIcon MapIcon1 = new MapIcon();
MapIcon1.Location = new Geopoint(new BasicGeoposition() { Latitude = 47.620, Longitude = -122.349 });
MapIcon1.NormalizedAnchorPoint = new Point(0.5, 1.0);
MapIcon1.Title = "Space Needle";
MapIcon1.Image = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/customicon.png"));
MapControl1.MapElements.Add(MapIcon1);
}
Does MapIcon present in Windows Phone 8 SDK?
You could use the Phone.Controls.Toolkit in order to have a custom Pushpin as an image on your map.
Reference: Image as pushpin on maps - Windows phone 8
I want to store the previous location before dragging a marker using PrimeFaces GMap - Draggable Markers
How to do it ?
showcase : GMap - Draggable Markers :
http://www.primefaces.org/showcase/ui/gmapDraggableMarkers.jsf
You could store copies of the original Marker objects and then, in the onMarkerDrag handler, you could find the original Marker that corresponds to the one passed by the MarkerDragEvent.
I say "copies" because it is possible that Primefaces modifies the LatLng of original Marker instead of creating a new one (most likely). You can use the "data" or "title" attributes to give them IDs and correctly match the copied Markers.
I can probably explain this with code, let me know if you need help.
Edit:
To meet your requirement, I would adapt the Primefaces showcase example as follows (notice that it requires the Marker's title to be unique. If this is not possible, implement this using the data attribute of the Marker class.):
package org.primefaces.examples.view;
//...
public class MapBean implements Serializable {
private MapModel draggableModel;
private Map<String, LatLng> positions = new HashMap<String, LatLng>(); // new
public MapBean() {
draggableModel = new DefaultMapModel();
positions.put("Konyaalti", new LatLng(36.879466, 30.667648));
positions.put("Ataturk Parki", new LatLng(36.883707, 30.689216));
positions.put("Karaalioglu Parki", new LatLng(36.879703, 30.706707));
positions.put("Kaleici", new LatLng(36.885233, 30.702323));
for (Map.Entry<String, LatLng> e : positions.entrySet()) {
Marker m = new Marker(e.getValue(), e.getKey());
m.setDraggable(true);
draggableModel.addOverlay(m);
}
}
public void onMarkerDrag(MarkerDragEvent event) {
marker = event.getMarker();
addMessage(new FacesMessage(FacesMessage.SEVERITY_INFO, "Marker Dragged", "Lat:" + marker.getLatlng().getLat() + ", Lng:" + marker.getLatlng().getLng()));
// update position and get the old one
LatLng oldPosition = positions.put(marker.getTitle(), marker.getLatlng());
// ...
}
// ...
}