Draw map without basemap defined.

GuilhermeFernandes

Hello everyone.
I'm developing an app that receives bluetooth data from a GPS to draw a map. However I need to make this data collection work offline. Is there any way to work with localization, drawing a map without displaying a background map (basemap)?

See an example in the attached image.

screenshot1.png

RamaChintapalli

Ah I see what you are experiencing. I think you were trying to set a map that is NOT_LOADED to the MapView. (i.e map failing to load due to network unavailability) which is in turn not letting GraphicsOverlay to render.

 

You can try this,

 

@Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // inflate MapView from layout
    mMapView = (MapView) findViewById(R.id.mapView);

    // create a map with just the Spatial Reference, so that only background grid is present
    ArcGISMap map = new ArcGISMap(SpatialReference.create(3857));

    // add graphics overlay to MapView.
    GraphicsOverlay graphicsOverlay = addGraphicsOverlay(mMapView);
    //add some buoy positions to the graphics overlay
    addBuoyPoints(graphicsOverlay);
    //add boat trip polyline to graphics overlay
    addBoatTrip(graphicsOverlay);
    //add nesting ground polygon to graphics overlay
    addNestingGround(graphicsOverlay);
    //add text symbols and points to graphics overlay
    addText(graphicsOverlay);

    // Now set empty map to mapview, that allows graphics overlay to render
    mMapView.setMap(map);
    // Then set the basemap to the map
    map.setBasemap(Basemap.createDarkGrayCanvasVector());
  }

 

Thanks
Rama