如何使一个标记出现或消失的基础上谷歌地图V2缩放级别 [英] How to make a marker appear or disappear based on zoom level on Google Maps v2

问题描述

我们都知道，有些在谷歌地图的predefined地标不会出现在一个较低的缩放级别，但在一个更高的缩放级别，它突然出现。我想知道如果我可以做一个自定义的标记没有出现在较低的缩放级别，则出现在更高的。

We all know that some of the predefined landmarks on Google Maps does not appear on a lower zoom level, but on a higher zoom level, it suddenly appears. I would like to know If I can make a customized marker not appear at lower zoom levels, then appear at higher ones.

编辑：这是我的code的片段

 // Changing marker icon
   marker.icon(BitmapDescriptorFactory.fromResource(R.drawable.gasbig));


   // adding marker
  map.addMarker(marker);

  //position on Center

  CameraPosition cameraPosition = new CameraPosition.Builder().target(
          new LatLng(14.635356, 121.03272914)).zoom(16).build();

  map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

  map.setOnCameraChangeListener(new OnCameraChangeListener() {

        @Override
        public void onCameraChange(CameraPosition arg0) {
            if(arg0.zoom > 7){
                marker.visible(true);

            }


        }
    });

我试过MaciejGórski的建议，但仍然标记在所有缩放级别出现。我很抱歉关于这个问题我还是一个Android新手。

I tried the suggestion of MaciejGórski but the marker still appears on all zoom levels. I'm sorry about the question I'm still an android newbie.

先谢谢了。

推荐答案

您可以做任何标记你想要的：调用调用setVisible 在 OnCameraChangeListener.onCameraChange 回调与真正或假根据 CameraPosition.zoom 值。

You can do that for any Marker you want: call setVisible in OnCameraChangeListener.onCameraChange callback with true or false depending on CameraPosition.zoom value.

问题后编辑编辑：

您需要参考保持标记而不是的MarkerOptions ：

You need to keep a reference to Marker instead of MarkerOptions:

// adding marker
marker = map.addMarker(markerOptions);

和调用调用setVisible 上标记：

    @Override
    public void onCameraChange(CameraPosition cameraPosition) {
        marker.setVisible(cameraPosition.zoom > 7);
    }

注意：调用setVisible 总是叫有，但采用了许多标记 S当这可能不是最佳

Note: setVisible is always called there, but this might not be optimal when using many Markers.

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