Lines on a map

public class SampleLinesOnAMapActivity extends AppCompatActivity  implements Style.OnStyleLoaded {

    private MapView mapView;
    private TrimbleMapsMap map;
    private final String SOURCE_ID = "linesource";
    private final String LAYER_ID = "linelayer";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Authorize the API key for the session.
        // .apiKey() requires your Trimble Maps API key
        TrimbleMapsAccount trimbleMapsAccount = TrimbleMapsAccount.builder()
                .apiKey("Your-API-key-here")
                .addLicensedFeature(LicensedFeature.MAPS_SDK)
                .build();

        // Initialize the session
        TrimbleMapsAccountManager.initialize(trimbleMapsAccount);
        TrimbleMapsAccountManager.awaitInitialization();

        // Get an instance of the map, done before the layout is set.
        TrimbleMaps.getInstance(this);
        setContentView(R.layout.activity_sample_lines_on_a_map);

        // Set up the MapView from the layout
        mapView = (MapView) findViewById(R.id.mapView);

        // the onMapReadyCallback is fired when the map is ready to be worked with
        mapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(@NonNull TrimbleMapsMap trimbleMapsMap) {
                // The TrimbleMapsMap object is created, now a style can be applied to render a map.
                map = trimbleMapsMap;
                CameraPosition position = new CameraPosition.Builder()
                        .target(new LatLng(40.60902838712187, -97.73800045737227))
                        .zoom(2.5)
                        .build();
                map.setCameraPosition(position);

                // This class implements the onStyleLoaded method, that will be called when
                // the style has been loaded.
                map.setStyle(Style.MOBILE_DAY, SampleLinesOnAMapActivity.this);
            }
        });
    }

    @Override
    public void onStyleLoaded(Style style) {
        // In this example a .json file from the assets folder is being used as the source
        // Geojson can either be passed in as a string or the result of a URI call.

        try {
            // Create a source and add it to the style. Important to note, sources are linked to styles.
            // If you change the style you may need to re-add your source and layers
            style.addSource(new GeoJsonSource(SOURCE_ID, new URI("asset://lines.json")));
            // See sample JSON file (lines.json) below

            // Create a LineLayer to display our source information.
            LineLayer lineLayer = new LineLayer(LAYER_ID, SOURCE_ID);
            lineLayer.setProperties(
                    PropertyFactory.lineWidth(6f),
                    PropertyFactory.lineColor(Color.BLUE),
                    PropertyFactory.lineOpacity(.8f)

            );

            // add the layer
            style.addLayer(lineLayer);

        } catch (URISyntaxException e) {
            e.printStackTrace();
        }
    }

    /**
     * Activity Overrides
     */
    @Override
    public void onLowMemory() {
        super.onLowMemory();
        mapView.onLowMemory();
    }
    @Override
    public void onStart() {
        super.onStart();
        mapView.onStart();
    }
    @Override
    public void onResume() {
        super.onResume();
        mapView.onResume();
    }
    @Override
    public void onStop() {
        super.onStop();
        mapView.onStop();
    }
    @Override
    public void onPause() {
        super.onPause();
        mapView.onPause();
    }
    @Override
    public void onDestroy() {
        super.onDestroy();
        mapView.onDestroy();
    }
}