iOS Question How to draw a circle in Google Maps

Luiz Fernando Orlandini · Feb 18, 2015

Hi All...

How can I draw a Circle over a marker using b4i? In B4A we have GoogleMapsExtra library, but it is incompatible with B4i

Thanks.

Erel · Feb 19, 2015

Initialize it and then you can add circles with this code:

B4X:

Sub gmap_Click (Point As LatLng)
   gextra.AddCircle(Point.Latitude, Point.Longitude, 10000, Colors.Red)
End Sub

Luiz Fernando Orlandini · Feb 19, 2015

Erel said:
Initialize it and then you can add circles with this code:

B4X:

Sub gmap_Click (Point As LatLng) gextra.AddCircle(Point.Latitude, Point.Longitude, 10000, Colors.Red) End Sub

Thanks Erel. I just received a message saying that GoogleMapsExtras was created in a newer version than mine. I'm using B4i 1.8, we have any new version?

Thanks.

Luiz Fernando Orlandini · Feb 19, 2015

Erel said:
Initialize it and then you can add circles with this code:

B4X:

Sub gmap_Click (Point As LatLng) gextra.AddCircle(Point.Latitude, Point.Longitude, 10000, Colors.Red) End Sub

Erel it works very well =D

Just one more requirement... Is it possible to set a alpha in fillColor, since it's necessary to see the map content below draw circle

Luiz Fernando Orlandini · Feb 19, 2015

I found the code below in GMaps docs...

B4X:

CLLocationCoordinate2D circleCenter = CLLocationCoordinate2DMake(37.35, -122.0);
GMSCircle *circ = [GMSCircle circleWithPosition:circleCenter
                                         radius:1000];

circ.fillColor = [UIColor colorWithRed:0.25 green:0 blue:0 alpha:0.05];
circ.strokeColor = [UIColor redColor];
circ.strokeWidth = 5;
circ.map = mapView;

But I don't know how to write this code in B4i.

Erel · Feb 19, 2015

Luiz Fernando Orlandini said:
But I don't know how to write this code in B4i.

B4X:

 gextra.AddCircle(Point.Latitude, Point.Longitude, 10000, Colors.ARGB(100, 255, 0, 0,))

Fabio vega · Jul 26, 2020

Hello, some example with transparent color like: This no found

B4X:

Public Sub AddCircle (  gplt As LatLng , Radius As Double, Color As Int)
    Dim no As NativeObject = Me
    Dim circle As NativeObject = no.RunMethod( "createCircle:::", Array(gplt.Latitude, gplt.Longitude, Radius))
    circle.SetField("map", gmap)
    circle.SetField("strokeWidth", 2)
    circle.SetField("fillColor", circle.ColorToUIColor( Colors.Transparent) )
    circle.SetField("strokeColor", circle.ColorToUIColor( Color)) 

End Sub

iOS Question How to draw a circle in Google Maps

Luiz Fernando Orlandini

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Erel

B4X founder

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Luiz Fernando Orlandini

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Luiz Fernando Orlandini

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Luiz Fernando Orlandini

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Erel

B4X founder

Fabio vega

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iOS Question How to draw a circle in Google Maps

Luiz Fernando Orlandini

Active Member

Erel

B4X founder

Attachments

Luiz Fernando Orlandini

Active Member

Luiz Fernando Orlandini

Active Member

Luiz Fernando Orlandini

Active Member

Erel

B4X founder

Fabio vega

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