避免在 android 上重新加载 arcgis 地图

avoid reload arcgis map on android

我经常移动一个点,问题是要将点保持在地图内并且在移动时不会丢失,我必须重新加载地图。怎么能不充电呢,每两秒移动一次,每两秒重新加载一次地图,太难受了。

这里是代码:

  cont++;
        final long EXECUTION_TIME = 2000;
        final Handler handler = new Handler();

       handler.postDelayed(new Runnable() {
            int aux = 0;               
            @Override
            public void run() {

                        GraphicsOverlay graphicsOverlay1 = new GraphicsOverlay();
                        Graphic g1 = new Graphic(getLatLong(aux), attributes, sms);
                        graphicsOverlay1.getGraphics().add(g1);

                        mMap.getGraphicsOverlays().add(graphicsOverlay1);
                        map = new ArcGISMap(basemapType, getLatLong(aux).getY(), getLatLong(aux).getX(), 17);

                        mMap.setMap(map);  //Here is where the map is reloaded, some other way to avoid this burden


                        handler.postDelayed(this, EXECUTION_TIME);
    }
)};

您必须在您的mMap中使用方法:SetViewpointCenterAsync,从而避免在更新地图上的点时加载地图。

代码如下所示:

map = new ArcGISMap(basemapType, getLatLong(aux).getY(), getLatLong(aux).getX(), 17);

mMap.setMap(map); 
cont++;
final long EXECUTION_TIME = 2000;
final Handler handler = new Handler();

  handler.postDelayed(new Runnable() {
int aux = 0;               
@Override
public void run() {

            GraphicsOverlay graphicsOverlay1 = new GraphicsOverlay();
            Graphic g1 = new Graphic(getLatLong(aux), attributes, sms);
            graphicsOverlay1.getGraphics().add(g1);

            mMap.getGraphicsOverlays().add(graphicsOverlay1);

            mMap.setViewpointCenterAsync(new Point( getLatLong(aux).getX(), getLatLong(aux).getY(),SpatialReferences.getWgs84()),6000.0) ;
            handler.postDelayed(this, EXECUTION_TIME);   }   )};