谷歌地图API的Andr​​oid V2 - 应用覆盖的形状之外 [英] Google Map Android API v2 - Apply an overlay outside of a shape

问题描述

使用谷歌地图API的Andr​​oid V2，我想申请一个形状之外的叠加。例如，我想提请形状围绕一个标记的应用灰色覆盖各地的这种形状。

Using Google Map Android API v2, I'm trying to apply an overlay outside of a shape. For example, I would like to draw a shape around a marker an apply a grey overlay all around this shape.

下面的结果，我想有： HTTP：//www.hostingpics .NET / viewer.php？ID = 221191googlemap.png

Here the result I would like to have : http://www.hostingpics.net/viewer.php?id=221191googlemap.png

我知道如何绘制形状，我知道如何使用的GroundOverlay 类应用所有地图上的灰色覆盖，但我不知道如何申请覆盖所有的地图上，除了在造型。

I know how to draw a shape and I know how to apply the grey overlay on all the map using the GroundOverlay class but I don't know how to apply the overlay on all the map except in the shape.

我真的希望有人可以帮我：）

I really hope that somebody will be able to help me :)

感谢你在前进！

推荐答案

您可以尝试在中间孔多边形叠加。即你的整个地图是由一个多边形不透明度值小于一粒铺上。可以在多边形的中间指定孔。见多边形覆盖的文件：

You can try polygon overlay with holes in the middle. i.e. your entire map is covered by a polygon with an opacity value less then one. You can specify holes in the middle of the polygon. See the documents of polygon overlay:

的http://developer.android.com/reference/com/google/android/gms/maps/model/Polygon.html

它说：

 A polygon can be convex or concave, it may span the 180 meridian and it can have holes that are not filled in

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