如何添加觸摸事件以顯示OSM中的經度和緯度

Question

如何在我的代碼中添加以下函數？網址是這樣的：how to add more marker in osm map in android please help me？我想補充功能打印每一個地方的用戶在吐司消息

public boolean onTouchEvent(MotionEvent event, MapView mapView) { 

    if (event.getAction() == 1) {     
     GeoPoint geopoint = (GeoPoint) mapView.getProjection().fromPixels((int) event.getX(), (int) event.getY()); 
     // latitude 
     double lat = geopoint.getLatitudeE6()/1E6; 
     // longitude 
     double lon = geopoint.getLongitudeE6()/1E6; 
     Toast.makeText(context, "Lat: " + lat + ", Lon: "+lon, Toast.LENGTH_SHORT).show(); 
    }        
    return false; 
} 

Answer 1

使用這段代碼的觸摸屏上顯示其緯度和經度在地圖上的位置的吐司消息和創建這個類的一個對象，並添加它的mapsOverlay

class MapOverlay extends com.google.android.maps.Overlay 
{ 
    @Override 
    public boolean draw(Canvas canvas, MapView mapView, 
    boolean shadow, long when) 
    { 
     //... 
    } 

    @Override 
    public boolean onTouchEvent(MotionEvent event, MapView mapView) 
    { 
     //---when user lifts his finger--- 
     if (event.getAction() == MotionEvent.ACTION_UP) {     
      GeoPoint p = mapView.getProjection().fromPixels(
       (int) event.getX(), 
       (int) event.getY()); 
       Toast.makeText(getBaseContext(), 
        p.getLatitudeE6()/1E6 + "," + 
        p.getLongitudeE6() /1E6 , 
        Toast.LENGTH_SHORT).show(); 
     }        
     return false; 
    }   
} 

加入這一行

mapView.getOverlays().add(new MapOverlay());