Show the Blue Dot with MapsIndoors - Part 2

Last updated: 4/19/2023

This is part 2 of the tutorial of managing a blue dot on the map. In Part 1 we created the position provider. Now we will create a Fragment displaying a map that shows the users (mock) location.

Create a class ShowUserLocationFragment that inherits from Fragment.

public class ShowUserLocationFragment extends Fragment {

Add a GoogleMap and a MapControl to the class

GoogleMap mGoogleMap;
MapControl mMapControl;

Add a map fragment

SupportMapFragment mMapFragment;

The latitude and longitude of the Venue

static final LatLng VENUE_LAT_LNG = new LatLng( 57.05813067, 9.95058065 );

Set the API key to the MapsIndoors Solution:

if( !MapsIndoors.getAPIKey().equalsIgnoreCase( getString( R.string.mi_api_key ) ) )
{
    MapsIndoors.setAPIKey( getString( R.string.mi_api_key ) );
}
if( getActivity() == null )
{
    return;
}

Instanciate and init the mapControl object

mMapControl = new MapControl( getActivity(), mMapFragment, mGoogleMap );
mMapControl.init( miError -> {
    if( miError == null )
    {
        Activity context = getActivity();
        if( context != null )
        {
            context.runOnUiThread( () -> {
                mMapControl.selectFloor( 1 );
                mGoogleMap.animateCamera( CameraUpdateFactory.newLatLngZoom( VENUE_LAT_LNG, 20f ) );
            });
        }
    }
});

• Create an instance of the 'DemoPositionProvider' that we defined previously

DemoPositionProvider demoPositionProvider = new DemoPositionProvider();

• Assign the DemoPositionProvider instance to the MapsIndoors.positionProvider by calling the 'MapsIndoors.setPositionProvider'

MapsIndoors.setPositionProvider(demoPositionProvider);

• Start positioning

demoPositionProvider.startPositioning(null);

• Tell the mapControl to show the users location

mMapControl.showUserPosition(true);

In the 'onDestroyView' method, we need to free the MapsIndoors PositionProvider

MapsIndoors.setPositionProvider(null);

See the sample in ShowUserLocationFragment.java