我使用此代码来查看用户当前位置。当前位置

Question

我使用此代码查看用户当前位置。但我也需要在上面放一个标记。我已经看到了一些关于这方面的教程，但我仍然不明白。

这里是我的活动

public class MapViewActivity extends MapActivity { 
    @Override 
    protected void onCreate(Bundle arg0) { 
     // TODO Auto-generated method stub 
     super.onCreate(arg0); 
     setContentView(R.layout.mapview); 


//------------Start Displaying Map View--------------//  
    LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); 

      LocationListener locationListener = new LocationListener() { 
       public void onLocationChanged(Location location) { 
        int lat = (int) (location.getLatitude() * 1E6); 
        int lng = (int) (location.getLongitude() * 1E6); 
        GeoPoint test= new GeoPoint(
          lat,lng); 

        MapView mapview = (MapView) findViewById(R.id.mvmap); 
        MapController mapcontrol = mapview.getController(); 
        mapcontrol.animateTo(test); 
        mapcontrol.setZoom(10); 
        mapview.setStreetView(true); 
        mapview.setSatellite(true); 
        mapview.setBuiltInZoomControls(true); 
       } 


       public void onProviderDisabled(String provider) { 
        // TODO Auto-generated method stub 

       } 

       public void onProviderEnabled(String provider) { 
        // TODO Auto-generated method stub 

       } 

       public void onStatusChanged(String provider, int status, Bundle extras) { 
        // TODO Auto-generated method stub 

       } 
      }; 
      locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener); 

Answer 1

使用这个类ItemizedOverlay。

public class CustomItemizedOverlay extends ItemizedOverlay<OverlayItem> { 

private ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>(); 

private Context context; 

public CustomItemizedOverlay(Drawable defaultMarker) { 
    super(boundCenterBottom(defaultMarker)); 
} 

public CustomItemizedOverlay(Drawable defaultMarker, Context context) { 
    this(defaultMarker); 
    this.context = context; 
} 

@Override 
protected OverlayItem createItem(int i) { 
    return mapOverlays.get(i); 
} 

@Override 
public int size() { 
    return mapOverlays.size(); 
} 

@Override 
protected boolean onTap(int index) { 
    OverlayItem item = mapOverlays.get(index); 
    Log.e(" on tap item value ", "" + mapOverlays.get(index) + " Index " 
      + index); 
    AlertDialog.Builder dialog = new AlertDialog.Builder(context); 
    dialog.setTitle(item.getTitle()); 
    dialog.setMessage(item.getSnippet()); 
    dialog.show(); 

    return true; 
} 

public void addOverlay(OverlayItem overlay) { 
    mapOverlays.add(overlay); 
    this.populate(); 
} 

public void removeOverlay() { 
    mapOverlays.clear(); 
    // this.populate(); 
} 

}

在你MapViewActivity，声明，

CustomItemizedOverlay itemizedOverlay; 
List<Overlay> mapOverlays; 

mapOverlays = mapView.getOverlays(); 
Drawable drawable = this.getResources().getDrawable(R.drawable.marker); 
itemizedOverlay = new CustomItemizedOverlay(drawable, this); 


OverlayItem overlayitem = new OverlayItem(test," "," "); 
itemizedOverlay.addOverlay(overlayitem); 
mapOverlays.add(itemizedOverlay);