Android MapView：ItemizedOverlay 的 ZoomToSpan 方法存在问题

发布于 2024-11-16 00:35:27 字数 406 浏览 4 评论 0原文

我使用以下代码来缩放以查看 MapView 上的所有点：

mMapController.zoomToSpan(myOverlay.getLatSpanE6(), myOverlay.getLonSpanE6());

它可以工作，但它只考虑点而不考虑覆盖，因此给了我以下内容结果：

problem illustration

有办法解决这个问题吗？我想手动向 getLatSpanE6()/getLonSpanE6() 添加/减去一些纬度/经度，但这会很脏，而且我不知道应该添加/减去多少。有人有什么想法吗？

谢谢！

原文

I am using the following code to zoom to view all point on a MapView:

mMapController.zoomToSpan(myOverlay.getLatSpanE6(), myOverlay.getLonSpanE6());

It works, except a problem that it only considers points but not overlays, thus gives me the following result:

problem illustration

Is there anyway to deal with this? I was thinking that manually add/subtract some latitude/longitude to/from getLatSpanE6()/getLonSpanE6(), but this is going to be dirty and I don't know how much should I add/subtract. Does anyone have any ideas?

Thanks!

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情归归情 2024-11-23 00:35:27

请参阅我的回答此处

您唯一需要做的不同是考虑覆盖项目的高度及其宽度。

IE
伪代码：

projection of (latitude) + width of one overlay 

projection of (longitude) + height of one overlay

Refer to my answer here

The only thing you have to do different is take into account the height of the overlay item and its width.

i.e
pseudo-code :

projection of (latitude) + width of one overlay 

projection of (longitude) + height of one overlay

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瑶笙 2024-11-23 00:35:27

mapView.setBuiltInZoomControls(true);
MapController mapcontroller = mapView.getController();
mapcontroller.animateTo(gp);
mapcontroller.setCenter(point)
mapcontroller.setZoom(9);

根据您的要求设置给定方法的值，如果您希望答案更清晰，那么首先您应该阅读与 givn 方法相关的 android 的谷歌文档，然后您就明白了。我希望您能使用它解决您的问题。

mapView.setBuiltInZoomControls(true);
MapController mapcontroller = mapView.getController();
mapcontroller.animateTo(gp);
mapcontroller.setCenter(point)
mapcontroller.setZoom(9);

set the value of the given method according to your requirement if you want more clarity in the answer then first you should read the google documentation for android related to the givn method then you understand. I hope you got solution of your problem using it.

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