Location permission for Android above 6.0 with Xamarin.Forms.Maps

add this inside android MainActiviy OnCreate()

Plugin.CurrentActivity.CrossCurrentActivity.Current.Activity = this;

add this to android mainactivity:

public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Android.Content.PM.Permission[] grantResults)
{
    Plugin.Permissions.PermissionsImplementation.Current.OnRequestPermissionsResult(requestCode, permissions, grantResults);
    base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}

then this code will function, prompting user for location permission.

                var locator = CrossGeolocator.Current;
                locator.DesiredAccuracy = 1000;
                var position = await locator.GetPositionAsync(timeoutMilliseconds: 10000);

refer to:

https://jamesmontemagno.github.io/GeolocatorPlugin/

Be sure that you have set all necessary permissions. If you want to use Xamarin.Forms.Maps on Android be sure that you have the following permissions set in the AndroidManifest.xml file of your project:

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />

You can also set the permissions by clicking with the right mouse on your Android Project and selecting Properties. Go to the tab Android Manifest and mark all necessary permissions.

Be also sure that you have added the following two Statements in the application tag:

<meta-data android:name="com.google.android.geo.API_KEY" android:value="ADD_YOUR_KEY_HERE" />
<meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />

Location permission for Android above 6.0 with Xamarin.Forms.Maps

You wrote a lot of code about permission but I can't find where you request the permission, you need request the permission before you use it.

When you set IsShowingUser property to true, you should request the permission first, here are three solutions.

Solution 1:

I notice that you are using PermissionsPlugin in your code, if you need request this permission in PCL, you could refer to the PermissionsPlugin official sample.

Add this code in your MainActivity:

public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
{
    PermissionsImplementation.Current.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}

Request permission when you need it:

try
{
    var status = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Location);
    if (status != PermissionStatus.Granted)
    {
        if(await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.Location))
        {
            await DisplayAlert("Need location", "Gunna need that location", "OK");
        }

        var results = await CrossPermissions.Current.RequestPermissionsAsync(Permission.Location);
        status = results[Permission.Location];
     }

     if (status == PermissionStatus.Granted)
     {
         //Permission granted, do what you want do.
     }
     else if(status != PermissionStatus.Unknown)
     {
         await DisplayAlert("Location Denied", "Can not continue, try again.", "OK");
     }
}
catch (Exception ex)
{
    //...
}

Solution 2:

When you open your application, request the permission first, in MainActivity OnStart method:

protected override void OnStart()
{
    base.OnStart();

    if (ContextCompat.CheckSelfPermission(this, permission) != Permission.Granted)
    {
        ActivityCompat.RequestPermissions(this, new String[] { Manifest.Permission.AccessCoarseLocation, Manifest.Permission.AccessFineLocation }, 0);
    }
    else
    {
        System.Diagnostics.Debug.WriteLine("Permission Granted!!!");
    }
}

Solution 3:

Use DependencyService to request the permission when you need it, here is the sample related to the tutorial you have read. In this example, it requests permission when execute this line:

buttonGetLocation.Click += async (sender, e) => await TryGetLocationAsync();