在Android上的谷歌地图缩放事件

问题描述

我有我的MapController和MapView，我启用了内置的缩放控件使用：

  mapView.setBuiltInZoomControls（true）; 
  

现在我想在用户实际放大地图时收到一个事件，我该怎么走关于那个？我可以找到没有这样的事件或任何一般的事件，我可以检测到缩放级别的变化。

更新

。并且文档建议改用mapView.setBuiltInZoomControls（bool）。这是可以的，但我根本无法弄清楚如何对内置的缩放控件中的事件进行处理。

解决方案

Maps Android API v2可以使用如下所示：

  mMap.setOnCameraChangeListener（new OnCameraChangeListener（）{
 
 private float currentZoom = -1; 
 
 @Override 
 public void onCameraChange（CameraPosition pos）{
 if（pos.zoom！= currentZoom）{
 currentZoom = pos.zoom; 
 //你在这里行动
} 
} 
}）; 
  

We're building an application which is using the google maps api for android.

I have my MapController and MapView, and I enable the built-in zoom controls using:

mapView.setBuiltInZoomControls(true);

I would now like to get an event when the user actually zooms on the map, how do I go about that? I can find no such event or any general event where I could detect a change in zoom level.

Update

The mapView.getZoomControls() is deprecated. And the documentation suggests using mapView.setBuiltInZoomControls(bool) instead. This is okay, but I simply cannot figure out how to act on events from the built in zoom controls.

解决方案

With the Google Maps Android API v2 you can use a GoogleMap.OnCameraChangeListener like this:

mMap.setOnCameraChangeListener(new OnCameraChangeListener() {

    private float currentZoom = -1;

    @Override
    public void onCameraChange(CameraPosition pos) {
        if (pos.zoom != currentZoom){
            currentZoom = pos.zoom;
            // do you action here
        }
    }
});

这篇关于在Android上的谷歌地图缩放事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！