在地圖上僅顯示一次可點按

Question

按類重疊並從該類調用onTap方法我可以在我的地圖上顯示drawable。我想要做的事情只是當用戶點擊地圖時（第一個水龍頭）顯示一個可繪製的圖標，而不是通過點擊一次又一次顯示在不同的地方繪製。這可能嗎？

Answer 1

override you onTap() method of Overlay 

    @Override 
    protected boolean onTap(int index) { 
     Drawable srcdrawable = getApplicationContext().getResources().getDrawable(R.drawable.pin_blue); 
    CustomItemizedOverlay srcitemizedOverlay = new CustomItemizedOverlay(srcdrawable, getApplicationContext()); 
    forloop(setoflocations){ 
    GeoPoint srcpoint = new GeoPoint((int)(Double.parseDouble(lat) * 1E6),(int)(//latitude and longitude of user tapped location... 
Double.parseDouble(lng)* 1E6)); 
    OverlayItem srcoverlayitem = new OverlayItem(srcpoint, "Hello!", "This is your Location."); 
    if(srcitemizedOverlay!=null && mapController!=null){ 
    srcitemizedOverlay.addOverlay(overlayitem); 
    mapController.animateTo(point); 
    animatePoint = point; 
    } 
    } 
    mapView.getOverlays().clear(); 
    mapView.getOverlays().add(srcitemizedOverlay); 

    // pop up a alert dialog here and ask user for confirmation 

    }