开发者

Get the center coordinates of map in Android Mapview

In my application I'm trying to get the center coordinates of map when user 开发者_开发知识库scroll around the map.

I want to get the co-ordinates and set it on the text view.

Here is my code for that:

public boolean onTouchEvent(MotionEvent event) {
        int action=event.getAction();
        projection=mapView.getProjection();
        int X = (int)event.getX();          
        int Y = (int)event.getY();
        if(action==MotionEvent.ACTION_MOVE)
        {


            metrics = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(metrics);

            GeoPoint G = projection.fromPixels(metrics.heightPixels/2, metrics.widthPixels/2);
        //GeoPoint p=   mapView.getMapCenter();
            int lati=p.getLatitudeE6();
            Log.i("Lat : ",""+lati);
            Toast.makeText(this,""+lati,Toast.LENGTH_LONG);

            int longi=p.getLongitudeE6();
            Log.i("Lon : ",""+longi);
            Toast.makeText(this,""+longi,Toast.LENGTH_LONG);
            lat.setText(""+lati);
            lon.setText(""+longi);
        }
        return true;
    }


Use this article:

http://mobiforge.com/developing/story/using-google-maps-android

It will answer all of your questions about using mapview.(mostly all). Plus for your particular need:

search for "Getting the Location that was touched" on the page.


The OP included the correct answer in his question. This is how to do it:

GeoPoint mapCenter = mapView.getProjection().fromPixels(
        mapView.getWidth()/2,
        mapView.getHeight()/2);

int lat = mapCenter.getLatitudeE6();
int lon = mapCenter.getLongitudeE6();


API is slightly updated. Here's actual version:

val mapViewCenter = Point(
    googleMapView.width / 2,
    googleMapView.height / 2
)
val mapCenter: LatLng = googleMap.projection.fromScreenLocation(mapViewCenter)
0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜