无法单独获取选定的叠加值

Posted 2023-03-13

【中文标题】无法单独获取选定的叠加值

【英文标题】：Can't get the selected overlay values individually

【发布时间】：2012-10-19 06:37:12

【问题描述】：

我正在使用一个面向谷歌地图的 android 项目，现在我在这个类中遇到了一个问题，我使用某些覆盖来标记最近的地方，当我们触摸特定覆盖时，它会显示一个包含名称和引用的警报框现在我我现在使用getsnipet（）方法检索引用我不想显示警报对话框但是当我禁用那个东西时我无法获得引用任何人都可以帮助我修复这个错误，这是我的代码......

public class PlacesMapActivity extends MapActivity 
    // Nearest places
    PlacesList nearPlaces;

    // Map view
    MapView mapView;

    // Map overlay items
    List<Overlay> mapOverlays;

    AddItemizedOverlay itemizedOverlay;

    GeoPoint geoPoint;
    // Map controllers
    MapController mc;

    double latitude;
    double longitude;
    OverlayItem overlayitem;

    String p_u_name;
    Place reference;


    @Override
    public void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map_places);

        // Getting intent data
        Intent i = getIntent();

        p_u_name=i.getStringExtra("p_u_name");
        reference = (Place) i.getSerializableExtra("place_reference");


        i.putExtra("p_u_name",p_u_name);



        // Users current geo location
        String user_latitude = i.getStringExtra("user_latitude");
        String user_longitude = i.getStringExtra("user_longitude");

        System.out.println("sarath"+user_latitude + user_longitude);

        // Nearplaces list
        nearPlaces = (PlacesList) i.getSerializableExtra("near_places");

        mapView = (MapView) findViewById(R.id.mapView);
        mapView.setBuiltInZoomControls(true);

        mapOverlays = mapView.getOverlays();

        // Geopoint to place on map
        geoPoint = new GeoPoint((int) (Double.parseDouble(user_latitude) * 1E6),
                (int) (Double.parseDouble(user_longitude) * 1E6));

        // Drawable marker icon
        Drawable drawable_user = this.getResources()
                .getDrawable(R.drawable.mark_red);

        itemizedOverlay = new AddItemizedOverlay(drawable_user, this);

        // Map overlay item
        overlayitem = new OverlayItem(geoPoint, "Your Location",
                "That is you!");

        itemizedOverlay.addOverlay(overlayitem);

        mapOverlays.add(itemizedOverlay);
        itemizedOverlay.populateNow();

        // Drawable marker icon
        Drawable drawable = this.getResources()
                .getDrawable(R.drawable.mark_blue);

        itemizedOverlay = new AddItemizedOverlay(drawable, this);

        mc = mapView.getController();

        // These values are used to get map boundary area
        // The area where you can see all the markers on screen
        int minLat = Integer.MAX_VALUE;
        int minLong = Integer.MAX_VALUE;
        int maxLat = Integer.MIN_VALUE;
        int maxLong = Integer.MIN_VALUE;

        // check for null in case it is null
        if (nearPlaces.results != null) 
            // loop through all the places
            for (Place place : nearPlaces.results) 
                latitude = place.geometry.location.lat; // latitude
                longitude = place.geometry.location.lng; // longitude

                // Geopoint to place on map
                geoPoint = new GeoPoint((int) (latitude * 1E6),
                        (int) (longitude * 1E6));
                String s = place.formatted_address;
                String p = place.formatted_phone_number;
                String n = s;
                System.out.println("sarath"+s);



                // Map overlay item
                                 //Here it passes the selected overlay name and reference to the alerdialog box 
                overlayitem = new OverlayItem(geoPoint,place.name,place.reference);

                i.putExtra("place_reference", place.reference);

//              System.out.println("this is mapactivity and reference is:"+ab);

                itemizedOverlay.addOverlay(overlayitem);



                // calculating map boundary area
                minLat  = (int) Math.min( geoPoint.getLatitudeE6(), minLat );
                minLong = (int) Math.min( geoPoint.getLongitudeE6(), minLong);
                maxLat  = (int) Math.max( geoPoint.getLatitudeE6(), maxLat );
                maxLong = (int) Math.max( geoPoint.getLongitudeE6(), maxLong );
            
            mapOverlays.add(itemizedOverlay);

            // showing all overlay items
            itemizedOverlay.populateNow();
        

        // Adjusting the zoom level so that you can see all the markers on map
        mapView.getController().zoomToSpan(Math.abs( minLat - maxLat ), Math.abs( minLong - maxLong ));

        // Showing the center of the map
        mc.animateTo(new GeoPoint((maxLat + minLat)/2, (maxLong + minLong)/2 ));
        mapView.postInvalidate();

    

    @Override
    protected boolean isRouteDisplayed() 
        return false;
    

【问题讨论】：

这与 Google Maps API V3 无关。 （标签已删除）

【参考方案1】：

您的问题很不清楚...我认为“参考”是指“描述”，在这种情况下，您使用getsnippet() 是正确的。如果您已经通过AlertDialog 看到了String，那么取出对话框应该不会阻止您看到sn-p。您能否就您的具体问题再详细说明一下？