如何在mapbox中创建多边形区域

Question

我创建了android app使用mapbox;新的，我想用户挖出多边形区域并在地图上显示;

我怎么能在mapbox中这样做？ mapbox.com

Answer 1

我想你可以使用这个功能：

活动

private MapView mapView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Mapbox access token is configured here. This needs to be called either in your application
    // object or in the same activity which contains the mapview.
    Mapbox.getInstance(this, getString(R.string.mapbox_token));

    // This contains the MapView in XML and needs to be called after the access token is configured.
    setContentView(R.layout.main_activity);

    mapView = (MapView) findViewById(R.id.mapView);
    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(new OnMapReadyCallback() {
      @Override
      public void onMapReady(MapboxMap mapboxMap) {
        drawPolygon(mapboxMap);
      }
    });
  }

函数drawPolygon：

 private void drawPolygon(MapboxMap mapboxMap) {
    List<LatLng> polygon = new ArrayList<>();
    polygon.add(new LatLng(45.522585, -122.685699));
    polygon.add(new LatLng(45.534611, -122.708873));
    polygon.add(new LatLng(45.530883, -122.678833));
    polygon.add(new LatLng(45.547115, -122.667503));
    polygon.add(new LatLng(45.530643, -122.660121));
    polygon.add(new LatLng(45.533529, -122.636260));
    polygon.add(new LatLng(45.521743, -122.659091));
    polygon.add(new LatLng(45.510677, -122.648792));
    polygon.add(new LatLng(45.515008, -122.664070));
    polygon.add(new LatLng(45.502496, -122.669048));
    polygon.add(new LatLng(45.515369, -122.678489));
    polygon.add(new LatLng(45.506346, -122.702007));
    polygon.add(new LatLng(45.522585, -122.685699));
    mapboxMap.addPolygon(new PolygonOptions()
      .addAll(polygon)
      .fillColor(Color.parseColor("#CD0000")));
  }

我希望这可以帮助你。

Answer 2

mapbox api提供了处理地图MapboxMap.setOnMapClickListener(OnMapClickListener)（https://www.mapbox.com/android-docs/api/map-sdk/6.4.0/）点击的功能，它将为您提供位置。

我建议您使用这些位置逐步创建折线，一旦用户完成多边形，然后通过关闭形状将折线转换为多边形。

用户交互示例：https://www.mapbox.com/android-docs/maps/examples/#user-interaction