Drawing area at Google Map

Please see the image :

alt text http://img.skitch.com/20091211-bybjj3qtasrgr1dfaf4c42p39b.jpg

Any idea how开发者_开发技巧 to do that? drawing an area.

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The toolkit that allows users to draw polygons on MyMaps has been made available as the GeometryControls utility library

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If you're looking to use Google Maps API, check the documentation about Polylines (should be what that is) : http://code.google.com/intl/pt-PT/apis/maps/documentation/overlays.html#Polylines_Overview

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You need to instantiate a GPolygon object and add that (using the addOverlay method) to your GMap2 object:

var polygon = new GPolygon([new GLatLng(48.922499263758255,-94.921875),
    new GLatLng(49.03786794532641,-128.671875),
    new GLatLng(38.95940879245423,-126.38671875),
    new GLatLng(31.95216223802497,-118.30078125),
    new GLatLng(24.686952411999155,-96.50390625),
    new GLatLng(28.149503211544566,-87.1875),
    new GLatLng(23.725011735951796,-79.62890625),
    new GLatLng(44.59046718130883,-59.765625)], "#ff0000", 5, 1, "#0000ff", 0.2);
map.addOverlay (polygon);

The first parameter is an array of points (that make up your polygon), then the stroke (that is the outline)color, weight (thickness) and opacity (how transparent), then the fill color and opacity.

Here is a cut down example:

• GPolygon example
• GPolygon source

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Try this code : This really helped me

PolygonOptions rectOptions = new PolygonOptions()
                          .add(new LatLng(34.578289, 36.277231),
                               new LatLng(34.580568, 36.262041),
                               new LatLng(34.549016, 36.287584),
                               new LatLng(34.560977, 36.282660),
                               new LatLng(34.578289, 36.277231));

            // Get back the mutable Polygon
            Polygon polygon = mMap.addPolygon(rectOptions.strokeColor(Color.RED)
                    .fillColor(Color.BLUE));

Reference : https://developers.google.com/maps/documentation/android/shapes#customizing_appearances

where mMap is GoogleMap mMap; and add : import com.google.android.gms.maps.model.PolygonOptions;

Hope this will help you