Mark Mobile Location on Google Map using Xamarin.Android - google-maps

Question

Sir,
Developed an application using Xamarin on Visual Studio 2017 where I need to locate the current location of mobile when user turn on Location on his android device and then mark that location on Google Map using MarkerOption. For this I have followed steps as guided in following video https://www.youtube.com/watch?v=rCZN1c2azyE. But didn't got current location on map.
Below is my code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.Gms.Maps;
using Android.Locations;
using Android.Util;
using Android.Gms.Maps.Model;
namespace smvdappdev
{
[Activity(Label = "LOCATION MAP")]
//for google map, for gps location
public class UserLocationMap_Act : Activity, IOnMapReadyCallback, ILocationListener
{
//Map variable
private GoogleMap gooMap;
//Location
LocationManager locManager;
String provider;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
SetContentView(Resource.Layout.UserLocationMap);
//Back Button
ActionBar.SetDisplayHomeAsUpEnabled(true);
//Method for Map
SetUpMap();
locManager = (LocationManager)GetSystemService(Context.LocationService);
provider = locManager.GetBestProvider(new Criteria(), false);
Location location = locManager.GetLastKnownLocation(provider);
if (location == null)
{
System.Diagnostics.Debug.WriteLine("No location available!");
}
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
switch (item.ItemId)
{
case Android.Resource.Id.Home:
Finish();
return true;
default:
return base.OnOptionsItemSelected(item);
}
}
//for setting map on fragment placed on activity page
private void SetUpMap()
{
if (gooMap == null)
{
FragmentManager.FindFragmentById<MapFragment>(Resource.Id.fragment1).GetMapAsync(this);
}
}
//to draw map on map display view
public void OnMapReady(GoogleMap googleMap)
{
this.gooMap = googleMap;
//LatLng latlng = new LatLng()
//MarkerOptions mo = new MarkerOptions();
//mo.SetPosition(new LatLng(Convert.ToDouble(32.73), Convert.ToDouble(74.86)));
//mo.SetTitle("Civil Secretarait Jammu");
//googleMap.AddMarker(mo);
googleMap.UiSettings.CompassEnabled = true;
googleMap.UiSettings.ZoomControlsEnabled = true;
googleMap.MoveCamera(CameraUpdateFactory.ZoomIn());
//throw new NotImplementedException();
}
//*** Here all code for getting location via GPS
protected override void OnResume()
{
base.OnResume();
provider = LocationManager.GpsProvider;
//if (locManager.IsProviderEnabled(provider))
//{
locManager.RequestLocationUpdates(provider, 2000, 1, this);
//}
//else
//{
// Log.Info(tag, provider + " is not available. Does the device have location services enabled?");
//}
}
protected override void OnPause()
{
base.OnPause();
locManager.RemoveUpdates(this);
}
public void OnProviderEnabled(string provider)
{
}
public void OnProviderDisabled(string provider)
{
}
public void OnStatusChanged(string provider, Availability status, Bundle extras)
{
}
public void OnLocationChanged(Location location)
{
Double lat, lng;
lat = location.Latitude;
lng = location.Longitude;
MarkerOptions mo = new MarkerOptions();
mo.SetPosition(new LatLng(lat, lng));
//Toast.MakeText(this, "Latitude:" + lat.ToString() + ", Longitude:" + lng.ToString(), ToastLength.Long).Show();
mo.SetTitle("You are here!");
gooMap.AddMarker(mo);
CameraPosition.Builder builder = CameraPosition.InvokeBuilder();
builder.Target(new LatLng(lat, lng));
CameraPosition camPos = builder.Build();
CameraUpdate camUpdate = CameraUpdateFactory.NewCameraPosition(camPos);
gooMap.MoveCamera(camUpdate);
}
}
}

Answer 1

You can just use gooMap.MyLocationEnabled = true. You need to check and request location permission first in order for this to work.
With MyLocationEnabled set to true, it will show a precision circle and a blue dot showing where you are.