Java Google Maps V2 - Android - 获取当前缩放级别
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Google Maps V2 - Android - Get the current zoom level
提问by user268397
How do I get the current zoom level as an integer on a GoogleMap. I need to take this code from GMaps v1.1:
如何在 GoogleMap 上以整数形式获取当前缩放级别。我需要从 GMaps v1.1 中获取此代码：
MapView mGoogleMapView;
int zoomLevel = mGoogleMapView.getZoomLevel();
I am aware of the methods getMinZoomLevel() and getMaxZoomLevel() however I can't find anything in the Android GMap V2 documentation that will give the current zoom level. Does anyone have any pointers on how to do this?
我知道 getMinZoomLevel() 和 getMaxZoomLevel() 方法，但是我在 Android GMap V2 文档中找不到任何可以提供当前缩放级别的内容。有没有人对如何做到这一点有任何指示？
Any help would be appreciated.
任何帮助，将不胜感激。
采纳答案by Pavel Dudka
GoogleMap map;
....
....
float zoom = map.getCameraPosition().zoom;
回答by CommonsWare
Call getCameraPosition()on the GoogleMap, and read the zoomfield of the resulting CameraPositionobject.
打电话getCameraPosition()的GoogleMap，并读取zoom所产生的领域CameraPosition对象。
回答by ridoy
I think OnCameraChangeListenerwill do the trick..
我认为OnCameraChangeListener会做到这一点..
map.setOnCameraChangeListener(new OnCameraChangeListener() {
private float currentZoom = -1;
@Override
public void onCameraChange(CameraPosition position) {
if (position.zoom != currentZoom){
currentZoom = position.zoom; // here you get zoom level
}
}
});
Update:
更新：
From Google Play service 9.4.0 OnCameraChangeListenerhas been deprecated and it will no longer work soon.Alternately they are replaced by OnCameraMoveStarted??Listener,OnCameraMoveListener,OnCameraMoveCancel??edListenerand OnCameraIdleListener.
从 Google Play 服务 9.4.0 OnCameraChangeListener已被弃用，它很快将不再工作。或者它们被OnCameraMoveStarted??Listener、OnCameraMoveListener、OnCameraMoveCancel??edListener和OnCameraIdleListener 取代。
Hence we can use OnCameraIdleListenerhere to get camera's current zoom level.
因此我们可以在这里使用OnCameraIdleListener来获取相机的当前缩放级别。
Code Sample:
代码示例：
map.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
@Override
public void onCameraIdle() {
int zoomLevel = map.getCameraPosition().zoom;
//use zoomLevel value..
}
});
